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<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title>matteo's blog</title><link>https://matteo-gz.github.io/</link><description>This is my cool site</description><generator>Hugo -- gohugo.io</generator><language>en-us</language><lastBuildDate>Sun, 22 Jun 2025 14:58:36 +0800</lastBuildDate><atom:link href="https://matteo-gz.github.io/index.xml" rel="self" type="application/rss+xml"/><item><title>go大小压缩</title><link>https://matteo-gz.github.io/posts/binsize/</link><pubDate>Sun, 22 Jun 2025 14:58:36 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/binsize/</guid><description><![CDATA[<h2 id="官方自带">官方自带</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">go build -ldflags <span class="s1">'-s -w'</span> </span></span></code></pre></div></div>
<h2 id="upx-降低">upx 降低</h2>
<p><a href="https://github.com/upx/upx" target="_blank" rel="noopener noreffer ">https://github.com/upx/upx</a> 要选择最新版本,有优化效果</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">upx -9 ./your-bin</span></span></code></pre></div></div>
<p>这个推荐在服务端使用,客户端不可控(会遇到运行不起来case).</p>
<h2 id="减少包依赖大小">减少包依赖大小</h2>
<h3 id="大小分析">大小分析</h3>
<p><a href="https://github.com/Zxilly/go-size-analyzer" target="_blank" rel="noopener noreffer ">https://github.com/Zxilly/go-size-analyzer</a></p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># download</span>
</span></span><span class="line"><span class="cl">go install github.com/Zxilly/go-size-analyzer/cmd/gsa@latest
</span></span><span class="line"><span class="cl"><span class="c1"># 分析大小</span>
</span></span><span class="line"><span class="cl">gsa --web ./your-bin</span></span></code></pre></div></div>
<h3 id="依赖分析">依赖分析</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">go mod graph</span></span></code></pre></div></div>]]></description></item><item><title>Clickhouse</title><link>https://matteo-gz.github.io/posts/clickhouse/</link><pubDate>Sun, 09 Feb 2025 20:43:04 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/clickhouse/</guid><description><![CDATA[<p>Clickhouse作为一种数据仓库的产品.</p>
<h2 id="优点">优点</h2>
<ul>
<li>文档清晰且有AI问答工具.</li>
<li>入门难度很低,拥有Mysql的经验即可.</li>
<li>阿里云也有其产品可以购买,生产稳定,出问题概率低.</li>
<li>数据压缩,存储成本低.</li>
<li>索引速度快.</li>
<li>可以直接录入Mysql作为data source.</li>
<li>交互协议上支持Http协议,伪Mysql协议和原生高性能协议.</li>
</ul>
<h2 id="gui推荐">GUI推荐</h2>
<p>DataGrip.</p>
<h2 id="sql操作">SQL操作</h2>
<p>数据管理利用TTL特性进行数据回收.</p>
<h3 id="数据分布">数据分布</h3>
<p>查询</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">select</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">from</span><span class="w"> </span><span class="k">system</span><span class="p">.</span><span class="n">parts</span><span class="w"> </span><span class="k">limit</span><span class="w"> </span><span class="mi">10</span><span class="p">;</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="o">#</span><span class="w"> </span><span class="err">目前转移的数据</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">select</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">from</span><span class="w"> </span><span class="k">system</span><span class="p">.</span><span class="n">mutations</span><span class="p">;</span></span></span></code></pre></div></div>
<h3 id="计算表大小">计算表大小</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">SELECT</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">total_bytes</span><span class="o">/</span><span class="n">total_rows</span><span class="p">,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="k">table</span><span class="p">,</span><span class="k">database</span><span class="p">,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">formatReadableSize</span><span class="p">(</span><span class="n">total_bytes</span><span class="p">)</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">total_bytes_on_disk</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">FROM</span><span class="w"> </span><span class="k">system</span><span class="p">.</span><span class="n">tables</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">WHERE</span><span class="w"> </span><span class="k">table</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'table'</span><span class="p">;</span></span></span></code></pre></div></div>
<h3 id="表转移">表转移</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">RENAME</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="k">database</span><span class="p">.</span><span class="n">exist_table</span><span class="w"> </span><span class="k">TO</span><span class="w"> </span><span class="k">database</span><span class="p">.</span><span class="n">old_table</span><span class="p">,</span><span class="w"> </span><span class="k">database</span><span class="p">.</span><span class="n">new_table</span><span class="w"> </span><span class="k">TO</span><span class="w"> </span><span class="k">database</span><span class="p">.</span><span class="n">exist_table</span><span class="p">;</span></span></span></code></pre></div></div>
<h3 id="数据回收">数据回收</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="k">database</span><span class="p">.</span><span class="k">table</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="n">PARTITION</span><span class="w"> </span><span class="s1">'20240925'</span><span class="p">;</span></span></span></code></pre></div></div>
<h3 id="修改ttl">修改TTL</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="k">database</span><span class="p">.</span><span class="k">table</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">MODIFY</span><span class="w"> </span><span class="n">TTL</span><span class="w"> </span><span class="k">timestamp</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">toIntervalMonth</span><span class="p">(</span><span class="mi">2</span><span class="p">);</span></span></span></code></pre></div></div>
<h3 id="查看表结构">查看表结构</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">SELECT</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">field_name</span><span class="p">,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="k">table</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="k">table_name</span><span class="p">,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="k">type</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">field_type</span><span class="p">,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="k">comment</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">field_comment</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">FROM</span><span class="w"> </span><span class="k">system</span><span class="p">.</span><span class="n">columns</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">WHERE</span><span class="w"> </span><span class="k">database</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'database'</span><span class="w"> </span><span class="k">AND</span><span class="w"> </span><span class="k">table</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'table'</span><span class="p">;</span></span></span></code></pre></div></div>
<h2 id="常用函数">常用函数</h2>
<h3 id="易读数量">易读数量</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="n">formatReadableQuantity</span><span class="p">(</span><span class="k">count</span><span class="p">())</span></span></span></code></pre></div></div>
<h3 id="时间切割">时间切割</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="n">toStartOfInterval</span><span class="p">(</span><span class="n">toDateTime</span><span class="p">(</span><span class="k">timestamp</span><span class="p">),</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="k">day</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="n">interval1</span></span></span></code></pre></div></div>
<h3 id="截取数据">截取数据</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">substring</span><span class="p">(</span><span class="n">message</span><span class="p">,</span><span class="w"> </span><span class="o">-</span><span class="mi">20</span><span class="p">)</span><span class="w"> </span></span></span></code></pre></div></div>
<h3 id="数据类型转换">数据类型转换</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="n">toString</span></span></span></code></pre></div></div>
<h3 id="数据拼接">数据拼接</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="n">concat</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="s1">''</span><span class="p">,</span><span class="n">toString</span><span class="p">(</span><span class="n">b</span><span class="p">))</span></span></span></code></pre></div></div>
<h2 id="clickhouse-同步mysql数据">clickhouse 同步mysql数据</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="k">SET</span><span class="w"> </span><span class="n">allow_experimental_database_materialized_mysql</span><span class="o">=</span><span class="mi">1</span><span class="p">;</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">CREATE</span><span class="w"> </span><span class="k">DATABASE</span><span class="w"> </span><span class="n">new_database</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">ENGINE</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">MaterializedMySQL</span><span class="p">(</span><span class="s1">'host:3306'</span><span class="p">,</span><span class="s1">'database'</span><span class="p">,</span><span class="w"> </span><span class="s1">'user'</span><span class="p">,</span><span class="w"> </span><span class="s1">'password'</span><span class="p">)</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">SETTINGS</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">allows_query_when_mysql_lost</span><span class="o">=</span><span class="k">true</span><span class="p">,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="n">max_wait_time_when_mysql_unavailable</span><span class="o">=</span><span class="mi">10000</span><span class="p">;</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="c1">-- drop database new_database;</span></span></span></code></pre></div></div>
<h3 id="mysql-服务端">mysql 服务端</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-sql">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-sql" data-lang="sql"><span class="line"><span class="cl"><span class="n">default_authentication_plugin</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">mysql_native_password</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="n">gtid_mode</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">on</span></span></span></code></pre></div></div>
<h3 id="mysql-表条件">mysql 表条件</h3>
<p>MySQL中的每个表都应包含PRIMARY KEY，并且如果表中包含ENUM字段值超出范围（在ENUM签名中指定），则无法进行复制。</p>]]></description></item><item><title>Go 内存泄漏排查</title><link>https://matteo-gz.github.io/posts/memprofiling/</link><pubDate>Wed, 14 Aug 2024 07:33:07 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/memprofiling/</guid><description><![CDATA[<h2 id="背景">背景</h2>
<p>某次发版后,生产机器的内存相比之前相同负载条件下使用率高,业务无异常影响.
而后带来的影响是,数据库连接资源随着pod数量提升占用提高.</p>
<h3 id="间接处理">间接处理</h3>
<ul>
<li>回滚版本</li>
<li>每隔固定时间定时重新发版</li>
<li>把所有依赖pkg升级至最新,把Go版本升级至最新</li>
<li>服务拆分,让业务链路保持简单.</li>
</ul>
<h3 id="直接处理">直接处理</h3>
<ul>
<li>排查内存泄漏与修复</li>
</ul>
<h3 id="思路">思路</h3>
<h4 id="复现生产环境场景">复现生产环境场景</h4>
<p>在测试环境里,对比此次版本的功能改动点进行压测,难以压测的直接for循环将变动函数调用增加10倍来调试或者将time.ticker的频率放大10倍.</p>
<h4 id="使用pyroscope分析">使用pyroscope分析</h4>
<p>pyroscope <a href="https://pyroscope.io/" target="_blank" rel="noopener noreffer ">https://pyroscope.io/</a> 是基于golang的<code>pprof</code>工具进行采集.</p>
<h4 id="使用pprof">使用pprof</h4>
<p>go官方自带的工具 <a href="https://github.com/google/pprof" target="_blank" rel="noopener noreffer ">https://github.com/google/pprof</a></p>
<h4 id="使用perf">使用perf</h4>
<p>perf是个经典的分析工具, <a href="https://github.com/google/perf_data_converter" target="_blank" rel="noopener noreffer ">https://github.com/google/perf_data_converter</a> 可以将<code>perf</code>的分析报告转化为<code>pprof</code>的格式进行分析</p>
<h2 id="pprof着手分析">pprof着手分析</h2>
<h3 id="下载heap分析文件">下载heap分析文件</h3>
<p>接入pprof后,可用<code>curl</code>下载分析文件 <code>curl -o heapfile http://localhost/debug/pprof/heap?seconds=30</code> .
上述命令可捕获30秒的堆文件分析.</p>
<h3 id="查看pprof官方自带文档">查看pprof官方自带文档</h3>
<p>关于pprof的使用说明,请务必看完 <a href="https://github.com/google/pprof/blob/main/doc/README.md" target="_blank" rel="noopener noreffer ">https://github.com/google/pprof/blob/main/doc/README.md</a>
该文讲述了</p>
<ul>
<li>pprof字段 <code>flat</code> <code>cum</code> 代表的含义.</li>
<li>可通过web的方式进行UI交互或者cli方式交互. <code>go tool pprof -http :8810 heapfile</code></li>
<li>调用图里面的颜色,矩形大小,矩形边缘粗细,虚线箭头和实线箭头的含义解释</li>
<li>可对比2个时间段的pprof文件,<code>go tool pprof --base base.heap current.heap</code></li>
</ul>
<h3 id="内存采样率控制">内存采样率控制</h3>
<p><a href="https://github.com/golang/go/blob/release-branch.go1.23/src/runtime/mprof.go#L938" target="_blank" rel="noopener noreffer ">runtime.MemProfileRate</a> 采样率控制.</p>
<p>假设runtime.MemProfileRate=N,那么采样为1/N进行.如果觉得采样率小了,可以在测试环境进行调整.</p>
<h3 id="空闲-heap">空闲 Heap</h3>
<p><a href="http://localhost/debug/pprof/heap?debug=1" target="_blank" rel="noopener noreffer ">http://localhost/debug/pprof/heap?debug=1</a> 有个<code>HeapIdle</code>指标.</p>]]></description></item><item><title>linux压测配置优化</title><link>https://matteo-gz.github.io/posts/press_linux/</link><pubDate>Wed, 29 May 2024 00:21:12 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/press_linux/</guid><description><![CDATA[<h2 id="背景">背景</h2>
<p>临时租赁服务器,进行灰度压测,进行大量并发cURL.测试机器压榨单机极限性能.</p>
<h2 id="修改单进程句柄限制">修改单进程句柄限制</h2>
<h3 id="查看进程最大文件数">查看进程最大文件数</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 查看进程最大文件数</span>
</span></span><span class="line"><span class="cl"><span class="nb">ulimit</span> -n</span></span></code></pre></div></div>
<h3 id="修改进程最大文件数">修改进程最大文件数</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="nb">ulimit</span> -SHn <span class="m">1048576</span></span></span></code></pre></div></div>
<ul>
<li>S 表示设置软限制（soft limit）。软限制是指系统允许进程使用的资源上限，但进程可以尝试超过这个限制。</li>
<li>H 表示设置硬限制（hard limit）。硬限制是指系统绝对允许进程使用的资源上限，即使进程尝试超过这个限制，系统也会阻止它。</li>
<li>n 表示设置进程可以打开的文件描述符的最大数量</li>
</ul>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 防止重启后失效</span>
</span></span><span class="line"><span class="cl"><span class="nb">echo</span> <span class="nb">ulimit</span> -HSn <span class="m">1048576</span> >> /etc/rc.local
</span></span><span class="line"><span class="cl"><span class="nb">echo</span> <span class="nb">ulimit</span> -HSn <span class="m">1048576</span> >>/root/.bash_profile</span></span></code></pre></div></div>
<h3 id="ulimit影响因素">ulimit影响因素</h3>
<ul>
<li><code>fs.nr_open</code>;进程最大文件描述符数</li>
<li><code>fs.file-max</code>;系统最大文件描述符数</li>
</ul>
<h3 id="修改etcsysctlconf">修改<code>/etc/sysctl.conf</code></h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># /etc/sysctl.conf</span>
</span></span><span class="line"><span class="cl">fs.file-max <span class="o">=</span> <span class="m">1048576</span>
</span></span><span class="line"><span class="cl">fs.nr_open<span class="o">=</span><span class="m">1048576</span></span></span></code></pre></div></div>
<h2 id="nf_conntrack_max-开启">nf_conntrack_max 开启</h2>
<p>防止配置<code>net.nf_conntrack_max</code>报错</p>]]></description></item><item><title>linux排查</title><link>https://matteo-gz.github.io/posts/linux_debug/</link><pubDate>Sat, 25 May 2024 14:45:53 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/linux_debug/</guid><description><![CDATA[<blockquote>
<p>Linux性能优化实战 笔记
<a href="https://time.geekbang.org/column/intro/100020901" target="_blank" rel="noopener noreffer ">https://time.geekbang.org/column/intro/100020901</a></p></blockquote>
<h2 id="模拟工具">模拟工具</h2>
<h3 id="stress">stress</h3>
<blockquote>
<p>stress 是一个 Linux 系统压力测试工具，这里我们用作异常进程模拟平均负载升高的场景</p></blockquote>
<p><code>apk add stress-ng</code></p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 一个 CPU 使用率 100%</span>
</span></span><span class="line"><span class="cl">stress --cpu <span class="m">1</span> --timeout <span class="m">600</span></span></span></code></pre></div></div>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 模拟 I/O 压力</span>
</span></span><span class="line"><span class="cl">stress -i <span class="m">1</span> --timeout <span class="m">600</span></span></span></code></pre></div></div>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 8个进程</span>
</span></span><span class="line"><span class="cl"> stress -c <span class="m">8</span> --timeout <span class="m">600</span></span></span></code></pre></div></div>
<h3 id="sysbench">sysbench</h3>
<blockquote>
<p>sysbench 是一个多线程的基准测试工具，一般用来评估不同系统参数下的数据库负载情况</p>]]></description></item><item><title>supervisor搭建</title><link>https://matteo-gz.github.io/posts/supervisor/</link><pubDate>Thu, 23 May 2024 17:44:27 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/supervisor/</guid><description><![CDATA[<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><pre tabindex="0"><code># 下载
pip install supervisor
# 初始化配置
echo_supervisord_conf > /etc/supervisord.conf</code></pre></div>
<p>vim <code>/etc/supervisord.conf</code> append</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><pre tabindex="0"><code>[program:process1]
command=/root/process1
autorestart=true</code></pre></div>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 载入服务</span>
</span></span><span class="line"><span class="cl">supervisord -c /etc/supervisord.conf
</span></span><span class="line"><span class="cl"><span class="c1"># 启动</span>
</span></span><span class="line"><span class="cl">supervisorctl start process1
</span></span><span class="line"><span class="cl"><span class="c1"># 停止</span>
</span></span><span class="line"><span class="cl">supervisorctl stop process1
</span></span><span class="line"><span class="cl"><span class="c1"># 更新了 /etc/supervisord.conf后</span>
</span></span><span class="line"><span class="cl">supervisorctl reload</span></span></code></pre></div></div>]]></description></item><item><title>排查网络</title><link>https://matteo-gz.github.io/posts/network_check/</link><pubDate>Sat, 27 Apr 2024 18:17:11 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/network_check/</guid><description><![CDATA[<h2 id="检查tcp端口连通性">检查TCP端口连通性</h2>
<p><code>nc -vz www.example.com 80 </code></p>
<p>v是verbose mode</p>
<p>使用-z参数快速扫描端口状态,是否开放</p>
<h3 id="window下powershell">window下powershell</h3>
<p><code>Test-NetConnection -ComputerName 127.0.0.1 -Port 6379</code></p>
<h2 id="检查网络延时">检查网络延时</h2>
<p><code>mtr baidu.com -r</code>
数字单位是ms,r是report的意思</p>
<h2 id="ping">ping</h2>
<p>ping检查范围限于ICMP协议</p>
<h2 id="kill端口">kill端口</h2>
<p>window</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 寻找占用80端口</span>
</span></span><span class="line"><span class="cl">netstat -ano <span class="p">|</span>findstr <span class="m">80</span>
</span></span><span class="line"><span class="cl"><span class="c1"># kill进程</span>
</span></span><span class="line"><span class="cl">taskkill /f /pid <span class="m">28020</span></span></span></code></pre></div></div>
<h3 id="找到进程的启动命令">找到进程的启动命令</h3>
<p>window环境</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">wmic process where <span class="s2">"processid=1323"</span> get processid,commandline</span></span></code></pre></div></div>]]></description></item><item><title>Redis实操记录</title><link>https://matteo-gz.github.io/posts/redis/</link><pubDate>Sat, 27 Apr 2024 00:18:43 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/redis/</guid><description><![CDATA[<h2 id="redis架构">redis架构</h2>
<p>目的: 针对不同的业务特性,选择合适的架构.</p>
<h3 id="单机模式">单机模式</h3>
<p>一台redis节点,适合本地使用.</p>
<p>若机器挂了则无解.</p>
<h3 id="主从模式">主从模式</h3>
<p>一台写节点,多台从节点,适合多读少写场景.</p>
<p>若写压力上来,则无解.</p>
<h3 id="哨兵模式">哨兵模式</h3>
<p>写节点自动转移,满足高可用.适合多读少写场景.</p>
<p>若写压力上来,则有瓶颈.写节点挂了会转移,写节点会故障一段时间.
若不彻底解决写压力,无法根治问题.</p>
<h3 id="集群模式">集群模式</h3>
<p>属于分布式架构,可以堆机器解决写压力.</p>
<h2 id="redis连接数">redis连接数</h2>
<p>目的: 提高应用性能,避免频繁的创建和销毁连接.</p>
<p>使用redis连接池.</p>
<p>需要埋点redis连接池的<strong>命中率</strong>.</p>
<p>若<strong>空闲连接</strong>持续为空,则明显连接数不够用需要<strong>提升</strong>.</p>
<p>根据业务<strong>压测</strong>,确定redis连接数的合理范围.</p>
<h3 id="关闭连接">关闭连接</h3>
<p>当应用关闭时,记得close连接.</p>
<h2 id="redis缓存策略">redis缓存策略</h2>
<h3 id="获取redis缓存策略">获取redis缓存策略</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">config get maxmemory-policy</span></span></code></pre></div></div>
<p>默认是<code>noeviction</code></p>
<h3 id="lru与lfu算法">LRU与LFU算法</h3>
<ul>
<li>Least Recently Used :最近最少使用</li>
<li>Least Frequently Used : 最近最不常用</li>
</ul>
<p>阿里云的redis策略是选择<code>volatile-lru</code></p>
<p>redis.conf</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">maxmemory-policy volatile-lru</span></span></code></pre></div></div>
<h3 id="查询redis的热点key">查询redis的热点key</h3>
<p>lfu算法下可使用<code>redis-cli --hotkeys</code>,查询redis的热点key.</p>]]></description></item><item><title>Go metrics</title><link>https://matteo-gz.github.io/posts/gometrics/</link><pubDate>Thu, 08 Feb 2024 10:20:57 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/gometrics/</guid><description><![CDATA[<h2 id="导入包">导入包</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">go get -u github.com/go-kratos/kratos/contrib/metrics/prometheus/v2</span></span></code></pre></div></div>
<h2 id="注册路由">注册路由</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-go">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="c1">// 导入pkg</span>
</span></span><span class="line"><span class="cl"> <span class="kn">import</span> <span class="s">"github.com/prometheus/client_golang/prometheus/promhttp"</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="c1">// http 服务注册此路由</span>
</span></span><span class="line"><span class="cl"><span class="nx">router</span><span class="p">.</span><span class="nf">Handle</span><span class="p">(</span><span class="s">"/metrics"</span><span class="p">,</span> <span class="nx">promhttp</span><span class="p">.</span><span class="nf">Handler</span><span class="p">())</span></span></span></code></pre></div></div>
<h2 id="验证是否引入metrics">验证是否引入metrics</h2>
<p><code>curl /metrics</code> 可以看到默认的数据</p>
<h2 id="定义一个指标">定义一个指标</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-go">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="kd">var</span> <span class="nx">_metricRequests</span> <span class="p">=</span> <span class="nx">prometheus</span><span class="p">.</span><span class="nf">NewCounterVec</span><span class="p">(</span><span class="nx">prometheus</span><span class="p">.</span><span class="nx">CounterOpts</span><span class="p">{</span>
</span></span><span class="line"><span class="cl"> <span class="nx">Namespace</span><span class="p">:</span> <span class="s">"server"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nx">Subsystem</span><span class="p">:</span> <span class="s">"requests"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nx">Name</span><span class="p">:</span> <span class="s">"code_total"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"> <span class="nx">Help</span><span class="p">:</span> <span class="s">"The total number of processed requests"</span><span class="p">,</span>
</span></span><span class="line"><span class="cl"><span class="p">},</span> <span class="p">[]</span><span class="kt">string</span><span class="p">{</span><span class="s">"kind"</span><span class="p">,</span> <span class="s">"operation"</span><span class="p">,</span> <span class="s">"code"</span><span class="p">,</span> <span class="s">"reason"</span><span class="p">})</span></span></span></code></pre></div></div>
<h2 id="注册该指标">注册该指标</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-go">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="kn">import</span> <span class="s">"github.com/prometheus/client_golang/prometheus"</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="nx">prometheus</span><span class="p">.</span><span class="nf">MustRegister</span><span class="p">(</span><span class="nx">_metricRequests</span><span class="p">)</span></span></span></code></pre></div></div>
<h2 id="使用指标">使用指标</h2>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-go">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="kd">var</span> <span class="nx">requests</span> <span class="p">=</span> <span class="nx">prom</span><span class="p">.</span><span class="nf">NewCounter</span><span class="p">(</span><span class="nx">_metricRequests</span><span class="p">)</span>
</span></span><span class="line"><span class="cl"><span class="nx">requests</span><span class="p">.</span><span class="nf">With</span><span class="p">(</span><span class="s">"get"</span><span class="p">,</span> <span class="s">"/"</span><span class="p">,</span> <span class="s">"200"</span><span class="p">,</span> <span class="s">"OK"</span><span class="p">).</span><span class="nf">Inc</span><span class="p">()</span></span></span></code></pre></div></div>
<h2 id="验证定义指标是否生效">验证定义指标是否生效</h2>
<p>当我们使用完指标后 即可查看</p>]]></description></item><item><title>小米解锁BL</title><link>https://matteo-gz.github.io/posts/xiaomiunlock/</link><pubDate>Sat, 30 Dec 2023 17:01:21 +0800</pubDate><author>xxxx</author><guid>https://matteo-gz.github.io/posts/xiaomiunlock/</guid><description><![CDATA[<p>这个办法是通过<code>闲鱼APP</code>上找人,利用<code>UBL key</code>解锁小米BL.</p>
<p>此方法需要<strong>消耗金钱</strong>,即购买<code>UBL key</code>的钱.</p>
<p>免费的方法为 <code>https://github.com/MlgmXyysd/Xiaomi-HyperOS-BootLoader-Bypass</code> ,但是无法解锁小米14之后的机型.</p>
<h2 id="准备工作">准备工作</h2>
<h3 id="下载客户端">下载客户端</h3>
<p><a href="https://xiaomikey.net/" target="_blank" rel="noopener noreffer ">https://xiaomikey.net/</a>
window环境需要</p>
<h3 id="下载驱动">下载驱动</h3>
<p><a href="https://xiaomiflashtool.com/" target="_blank" rel="noopener noreffer ">https://xiaomiflashtool.com/</a></p>
<p>让xiaomikey客户端识别出小米手机,</p>
<p>理论上<code>xiaomikey软件</code>里面包含了<code>xiaomiflash</code></p>
<h3 id="下载adb">下载ADB</h3>
<p><a href="https://developer.android.com/tools/releases/platform-tools" target="_blank" rel="noopener noreffer ">https://developer.android.com/tools/releases/platform-tools</a></p>
<p>将路径追加尽系统path.</p>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">adb devices</span></span></code></pre></div></div>
<h2 id="准备刷机">准备刷机</h2>
<h3 id="小米手机进入开发者模式">小米手机进入开发者模式</h3>
<p>点击系统版本 连续点击5次 即可进入开发者模式</p>
<h3 id="开发者模式下进行usb调试">开发者模式下进行USB调试</h3>
<p>要求</p>
<ul>
<li>必须登录小米账号</li>
<li>必须插入sim卡</li>
<li>必须使用移动网络</li>
</ul>
<p>在开发者模式下 打开允许USB调试.</p>
<p>电脑插入手机,手机选择信任电脑的连接.</p>
<h3 id="adb进入fastboot模式">adb进入fastboot模式</h3>
<div class="code-block code-line-numbers open" style="counter-reset: code-block 0">
<div class="code-header language-shell">
<span class="code-title"><i class="arrow fas fa-angle-right fa-fw" aria-hidden="true"></i></span>
<span class="ellipses"><i class="fas fa-ellipsis-h fa-fw" aria-hidden="true"></i></span>
<span class="copy" title="Copy to clipboard"><i class="far fa-copy fa-fw" aria-hidden="true"></i></span>
</div><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl"><span class="c1"># 查看设备</span>
</span></span><span class="line"><span class="cl">adb devices
</span></span><span class="line"><span class="cl"><span class="c1"># 进入fastboot</span>
</span></span><span class="line"><span class="cl">adb reboot bootloader</span></span></code></pre></div></div>
<h3 id="登录xiaomikey">登录xiaomikey</h3>
<p>打开软件,选择 <code>unlock boot- ubl key</code>.</p>]]></description></item></channel></rss>