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lib/promscrape/discovery/kubernetes: limit the minimum sleep time between updating dependent ScrapeWork objects

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Previously the sleep time could be dropped to nanoseconds, which could result in CPU time waste
This commit is contained in:
Aliaksandr Valialkin 2022-04-22 23:13:33 +03:00
parent a89e31b304
commit c2b13e6a04
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1 changed files with 6 additions and 2 deletions
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8
lib/promscrape/discovery/kubernetes/api_watcher.go
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@ -304,7 +304,8 @@ func (gw *groupWatcher) startWatchersForRole(role string, aw *apiWatcher) {
// as soon as the objects they depend on are updated.
// This should fix https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240 .
go func() {
sleepTime := 20 * time.Second
const minSleepTime = 5 * time.Second
sleepTime := minSleepTime
for {
time.Sleep(sleepTime)
startTime := time.Now()
@ -312,9 +313,12 @@ func (gw *groupWatcher) startWatchersForRole(role string, aw *apiWatcher) {
if uw.needUpdateScrapeWorks {
uw.needUpdateScrapeWorks = false
uw.updateScrapeWorksLocked(uw.objectsByKey, uw.aws)
sleepTime = time.Since(startTime)
if sleepTime < minSleepTime {
sleepTime = minSleepTime
}
}
gw.mu.Unlock()
sleepTime = time.Since(startTime)
}
}()
}