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README.md: add a section about Go profiling

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Aliaksandr Valialkin 2019-08-23 13:36:56 +03:00
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@ -88,6 +88,7 @@ Cluster version is available [here](https://github.com/VictoriaMetrics/VictoriaM
- [Monitoring](#monitoring)
- [Troubleshooting](#troubleshooting)
- [Backfilling](#backfilling)
- [Profiling](#profiling)
- [Roadmap](#roadmap)
- [Contacts](#contacts)
- [Community and contributions](#community-and-contributions)
@ -691,6 +692,25 @@ historical data with timestamps from the past, since the cache assumes that the
the current timestamps. Query cache can be enabled after the backfilling is complete.
### Profiling
VictoriaMetrics provides handlers for collecting the following [Go profiles](https://blog.golang.org/profiling-go-programs):
- Memory profile. It can be collected with the following command:
```
curl -s http://<victoria-metrics-host>:8428/debug/pprof/heap > mem.pprof
```
- CPU profile. It can be collected with the following command:
```
curl -s http://<victoria-metrics-host>:8428/debug/pprof/profile > cpu.pprof
```
The command for collecting CPU profile waits for 30 seconds before returning.
The collected profiles may be analyzed with [go tool pprof](https://github.com/google/pprof).
## Roadmap
- [ ] Replication [#118](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/118)