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lib/promscrape: do not spend CPU time on constructing scrapeWork key if clustering is disabled

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This commit is contained in:
Aliaksandr Valialkin 2021-04-07 21:54:06 +03:00
parent 1177dca3da
commit 5a0938d807
1 changed files with 9 additions and 6 deletions
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15
lib/promscrape/config.go
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@ -795,12 +795,15 @@ func appendSortedKeyValuePairs(dst []byte, m map[string]string) []byte {
var scrapeWorkKeyBufPool bytesutil.ByteBufferPool
func (swc *scrapeWorkConfig) getScrapeWork(target string, extraLabels, metaLabels map[string]string) (*ScrapeWork, error) {
// Verify whether the scrape work must be skipped.
bb := scrapeWorkKeyBufPool.Get()
defer scrapeWorkKeyBufPool.Put(bb)
bb.B = appendScrapeWorkKey(bb.B[:0], target, extraLabels, metaLabels)
if needSkipScrapeWork(bytesutil.ToUnsafeString(bb.B), *clusterMembersCount, *clusterReplicationFactor, *clusterMemberNum) {
return nil, nil
// Verify whether the scrape work must be skipped because of `-promscrape.cluster.*` configs.
if *clusterMembersCount > 1 {
bb := scrapeWorkKeyBufPool.Get()
bb.B = appendScrapeWorkKey(bb.B[:0], target, extraLabels, metaLabels)
needSkip := needSkipScrapeWork(bytesutil.ToUnsafeString(bb.B), *clusterMembersCount, *clusterReplicationFactor, *clusterMemberNum)
scrapeWorkKeyBufPool.Put(bb)
if needSkip {
return nil, nil
}
}
labels := mergeLabels(swc.jobName, swc.scheme, target, swc.metricsPath, extraLabels, swc.externalLabels, metaLabels, swc.params)