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Change default value of '-remoteWrite.queues' to cgroup.AvailableCPUs * 2 (#1385)

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* Change default value of '-remoteWrite.queues' to cgroup.AvailableCPUS() * 2 to reduce scrape interval

Default value of vmagent option '-remotewrite.queues' is 4 and default
size of vmagent ScheudleUnmarshalWorkers is number of CPUs, when available
CPUs is much greater than 4, e.g 32, worker are competing push queues
which will increase scrape interval and may cause scrape timeout.

* Update README and flag description

Co-authored-by: xiaozy <xiaozy01@fenbi.com>
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Zongyang 2021-06-16 17:16:44 +08:00 committed by GitHub
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2
app/vmagent/README.md
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@ -719,7 +719,7 @@ See the docs at https://docs.victoriametrics.com/vmagent.html .
Optional proxy URL for writing data to -remoteWrite.url. Supported proxies: http, https, socks5. Example: -remoteWrite.proxyURL=socks5://proxy:1234
Supports an array of values separated by comma or specified via multiple flags.
-remoteWrite.queues int
The number of concurrent queues to each -remoteWrite.url. Set more queues if default number of queues isn't enough for sending high volume of collected data to remote storage (default 4)
The number of concurrent queues to each -remoteWrite.url. Set more queues if default number of queues isn't enough for sending high volume of collected data to remote storage (default 2 * numberOfAvailableCPUs)
-remoteWrite.rateLimit array
Optional rate limit in bytes per second for data sent to -remoteWrite.url. By default the rate limit is disabled. It can be useful for limiting load on remote storage when big amounts of buffered data is sent after temporary unavailability of the remote storage
Supports array of values separated by comma or specified via multiple flags.

4
app/vmagent/remotewrite/remotewrite.go
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@ -28,8 +28,8 @@ var (
"Pass multiple -remoteWrite.url flags in order to write data concurrently to multiple remote storage systems")
tmpDataPath = flag.String("remoteWrite.tmpDataPath", "vmagent-remotewrite-data", "Path to directory where temporary data for remote write component is stored. "+
"See also -remoteWrite.maxDiskUsagePerURL")
queues = flag.Int("remoteWrite.queues", 4, "The number of concurrent queues to each -remoteWrite.url. Set more queues if default number of queues "+
"isn't enough for sending high volume of collected data to remote storage")
queues = flag.Int("remoteWrite.queues", cgroup.AvailableCPUs() * 2, "The number of concurrent queues to each -remoteWrite.url. Set more queues if default number of queues "+
"isn't enough for sending high volume of collected data to remote storage. Default value if 2 * numberOfAvailableCPUs")
showRemoteWriteURL = flag.Bool("remoteWrite.showURL", false, "Whether to show -remoteWrite.url in the exported metrics. "+
"It is hidden by default, since it can contain sensitive info such as auth key")
maxPendingBytesPerURL = flagutil.NewBytes("remoteWrite.maxDiskUsagePerURL", 0, "The maximum file-based buffer size in bytes at -remoteWrite.tmpDataPath "+