update

Author: ntk148v

linux/linux-swap-space-note.md

@@ -2,6 +2,11 @@
 
 <https://ntk148v.github.io/blog/posts/linux-swap-space-note/>
 
+Source:
+- [RedHad guideline](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/installation_guide/sect-disk-partitioning-setup-x86#sect-recommended-partitioning-scheme-x86)
+- [Chris Down's post](https://chrisdown.name/2018/01/02/in-defence-of-swap.html)
+- [Linux Hint - Understanding vm.swappiness](https://linuxhint.com/understanding_vm_swappiness/)
+
 ## 1. What is Swap?
 
 Swap file systems support virtual memory, data is written to a swap file system when there is not enough RAM to store the data your system is processing.
@@ -68,10 +73,10 @@ swap <= 10% * total-size-hard-drives && swap <= 128GB (if hibernation is allowed
 
 - Swap is not generally about getting emergency memory, it's about making memory reclamation egalitarian and efficient. In fact, using it as "emergency memory" is generally actively harmful.
 
-## 4. References
-
-1. [RedHad guideline](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/installation_guide/sect-disk-partitioning-setup-x86#sect-recommended-partitioning-scheme-x86)
+## 4. Check which processes are eating swap on linux
 
-2. [Chris Down's post](https://chrisdown.name/2018/01/02/in-defence-of-swap.html)
+Source: <https://superuser.com/questions/1677225/check-which-processes-are-eating-swap-on-linux>
 
-3. [Linux Hint - Understanding vm.swappiness](https://linuxhint.com/understanding_vm_swappiness/)
+- Use [smem](https://manpages.debian.org/bullseye/smem/smem.8.en.html):
+- Use [smemstat](http://manpages.org/smemstat/8): `smemstat -mT`
+- Use `top` and `htop` by adding SWAP column.

linux/tuned.md

@@ -0,0 +1,13 @@
+# TuneD
+
+Soruce:
+
+- <https://documentation.ubuntu.com/server/explanation/performance/perf-tune-tuned/>
+- <https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/performance_tuning_guide/chap-red_hat_enterprise_linux-performance_tuning_guide-tuned>
+
+TuneD*1 is a service used to tune your system and optimise the performance under certain workloads. At the core of TuneD are profiles, which tune your system for different use cases. TuneD is distributed with a number of predefined profiles for use cases such as:
+- High throughput
+- Low latency
+- Saving power
+
+It is possible to modify the rules defined for each profile and customise how to tune a particular device. When you switch to another profile or deactivate TuneD, all changes made to the system settings by the previous profile revert back to their original state.