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docs/Cluster-VictoriaMetrics.md: sync with upstream

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Aliaksandr Valialkin 2020-08-14 19:15:25 +03:00
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docs/Cluster-VictoriaMetrics.md
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@ -259,8 +259,8 @@ Each instance type - `vminsert`, `vmselect` and `vmstorage` - can run on the mos
* The recommended total number of vCPU cores for all the `vminsert` instances can be calculated from the ingestion rate: `vCPUs = ingestion_rate / 150K`.
* The recommended number of vCPU cores per each `vminsert` instance should equal to the number of `vmstorage` instances in the cluster.
* The amount of RAM per each `vminsert` instance should be 1GB or more. RAM is used as a buffer for spikes in ingestion rate.
The maximum amount of used RAM per `vminsert` node can be tuned with `-memory.allowedPercent` command-line flag. For instance, `-memory.allowedPercent=20`
limits the maximum amount of used RAM to 20% of the available RAM on the host system.
The maximum amount of used RAM per `vminsert` node can be tuned with `-memory.allowedPercent` or `-memory.allowedBytes` command-line flags.
For instance, `-memory.allowedPercent=20` limits the maximum amount of used RAM to 20% of the available RAM on the host system.
* Sometimes `-rpc.disableCompression` command-line flag on `vminsert` instances could increase ingestion capacity at the cost
of higher network bandwidth usage between `vminsert` and `vmstorage`.