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feat(prometheus.exporter.postgres): Update to version 0.19.0 and expose new collectors settings (#4640)
#### PR Description
Update the `postgres_exporter` to version
[v0.19.0](https://github.com/prometheus-community/postgres_exporter/releases/tag/v0.19.0)
(but continue to use our
[fork](https://github.com/grafana/postgres_exporter/tree/exporter-package-v0.19.0)).
The update adds support for configuring the `stat_statements` collector
flags, including `limit`, `exclude_databases`, and `exclude_users`.
#### Which issue(s) this PR fixes
Fixes#5502
#### Notes to the Reviewer
#### PR Checklist
<!-- Remove items that do not apply. For completed items, change [ ] to
[x]. -->
- [ ] CHANGELOG.md updated
- [x] Documentation added
- [ ] Tests updated
- [ ] Config converters updated
---------
Co-authored-by: Clayton Cornell <131809008+clayton-cornell@users.noreply.github.com>
***database_observability.mysql:** Make query sample text nullable in MySQL query details collector [backport] ([#5519](https://github.com/grafana/alloy/issues/5519)) ([fc49bfe](https://github.com/grafana/alloy/commit/fc49bfe172aaed8a9ef5ee8bce7e639e59f432fb))
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***database_observability.mysql:** Skip wait events with `NULL` timer_wait [backport] ([#5521](https://github.com/grafana/alloy/issues/5521)) ([2f43c91](https://github.com/grafana/alloy/commit/2f43c9123ef8ad75af72bd7c85dc3d08b4034ed1))
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***database_observability.postgres:** Improvements to SET search_path for postgres explain plans [backport] ([#5520](https://github.com/grafana/alloy/issues/5520)) ([ecbb577](https://github.com/grafana/alloy/commit/ecbb577fce3ca5061294aae74406e98f5f2a464a))
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***loki.process:** Registration of stage.metric when used inside stage.match [backport] ([#5495](https://github.com/grafana/alloy/issues/5495)) ([2bbc37e](https://github.com/grafana/alloy/commit/2bbc37e1c810d4c6c5655ec4204ff7e30a703d05))
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***loki.source.docker:** Parse timestamp correctly when log line only contains newline [backport] ([#5496](https://github.com/grafana/alloy/issues/5496)) ([55a82f0](https://github.com/grafana/alloy/commit/55a82f0f634f57bbd5634e486afe276d8c176e51))
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***loki.source.file:** Close file if we cannot find encoding [backport] ([#5531](https://github.com/grafana/alloy/issues/5531)) ([ccda4a5](https://github.com/grafana/alloy/commit/ccda4a50c38e230b2ed9caff718a8487da2b3f73))
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***prometheus.receive_http:** Bump prometheus patch for bugfix [backport] ([#5516](https://github.com/grafana/alloy/issues/5516)) ([b3531fb](https://github.com/grafana/alloy/commit/b3531fb8730256eac7f34c877fa6cf73c5a8a60b))
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***scheduling:** Shutdown runnables with a timeout before starting new ones [backport] ([#5443](https://github.com/grafana/alloy/issues/5443)) ([d446610](https://github.com/grafana/alloy/commit/d44661062d11711e9dae216fa98aaad61f027c30))
# Fork to grafana repo to address issue with freebsd build tags. This can be removed once https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/42645 is fixed
Copy file name to clipboardExpand all lines: docs/sources/reference/components/prometheus/prometheus.exporter.postgres.md
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@@ -45,6 +45,8 @@ There are a number of environment variables that aren't recommended for use, as
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Refer to the [`postgres_exporter` repository](https://github.com/prometheus-community/postgres_exporter#environment-variables) for a full list of environment variables.
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{{< /admonition >}}
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The `prometheus.exporter.postgres` component configures the embedded [`postgres_exporter`](https://github.com/prometheus-community/postgres_exporter) to run with a collection timeout of 10 seconds.
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By default, the same set of metrics is enabled as in the upstream [`postgres_exporter`](https://github.com/prometheus-community/postgres_exporter/).
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If `custom_queries_config_path` is set, additional metrics defined in the given configuration file will be exposed.
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If `disable_default_metrics` is set to `true`, only the metrics defined in the `custom_queries_config_path` file will be exposed.
@@ -132,10 +134,13 @@ The `stat_statements` block configures the selection of both the query ID and th
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This configuration takes effect only when the `stat_statements` collector is enabled.
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The following arguments are supported:
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| Name | Type | Description | Default | Required |
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