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backend: add prometheus metric for large snapshot duration.

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FIXES #7878
This commit is contained in:
fanmin shi 2017-05-05 16:34:22 -07:00
parent db6f45e939
commit 230106dd3c
2 changed files with 11 additions and 0 deletions
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1
mvcc/backend/backend.go
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@ -176,6 +176,7 @@ func (b *backend) Snapshot() Snapshot {
case <-ticker.C:
plog.Warningf("snapshotting is taking more than %v seconds to finish [started at %v]", time.Since(start).Seconds(), start)
case <-stopc:
snapshotDurations.Observe(time.Since(start).Seconds())
return
}
}

10
mvcc/backend/metrics.go
View File

@ -24,8 +24,18 @@ var (
Help: "The latency distributions of commit called by backend.",
Buckets: prometheus.ExponentialBuckets(0.001, 2, 14),
})
snapshotDurations = prometheus.NewHistogram(prometheus.HistogramOpts{
Namespace: "etcd",
Subsystem: "disk",
Name: "backend_snapshot_duration_seconds",
Help: "The latency distribution of backend snapshots.",
// 10 ms -> 655 seconds
Buckets: prometheus.ExponentialBuckets(.01, 2, 17),
})
)
func init() {
prometheus.MustRegister(commitDurations)
prometheus.MustRegister(snapshotDurations)
}