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docs/VictoriaLogs/README.md: add tuning chapter

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@ -31,6 +31,20 @@ you can join it via [Slack Inviter](https://slack.victoriametrics.com/).
See [Quick start docs](https://docs.victoriametrics.com/victorialogs/quickstart/) for start working with VictoriaLogs. See [Quick start docs](https://docs.victoriametrics.com/victorialogs/quickstart/) for start working with VictoriaLogs.
## Tuning
* No need in tuning for VictoriaLogs - it uses reasonable defaults for command-line flags, which are automatically adjusted for the available CPU and RAM resources.
* No need in tuning for Operating System - VictoriaLogs is optimized for default OS settings.
The only option is increasing the limit on [the number of open files in the OS](https://medium.com/@muhammadtriwibowo/set-permanently-ulimit-n-open-files-in-ubuntu-4d61064429a).
* The recommended filesystem is `ext4`, the recommended persistent storage is [persistent HDD-based disk on GCP](https://cloud.google.com/compute/docs/disks/#pdspecs),
since it is protected from hardware failures via internal replication and it can be [resized on the fly](https://cloud.google.com/compute/docs/disks/add-persistent-disk#resize_pd).
If you plan to store more than 1TB of data on `ext4` partition or plan extending it to more than 16TB,
then the following options are recommended to pass to `mkfs.ext4`:
```sh
mkfs.ext4 ... -O 64bit,huge_file,extent -T huge
```
## Monitoring ## Monitoring
VictoriaLogs exposes internal metrics in Prometheus exposition format at `http://localhost:9428/metrics` page. VictoriaLogs exposes internal metrics in Prometheus exposition format at `http://localhost:9428/metrics` page.