metrics,store: add a metric for ttlManager to record the lifet… (#14300)

pingcap · Jan 7, 2020 · 00f0015 · 00f0015
1 parent ca3e7ec
commit 00f0015
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Showing 3 changed files with 10 additions and 0 deletions.
diff --git a/metrics/metrics.go b/metrics/metrics.go
@@ -156,4 +156,5 @@ func RegisterMetrics() {
 	prometheus.MustRegister(TiKVTxnHeartBeatHistogram)
 	prometheus.MustRegister(TiKVPessimisticLockKeysDuration)
 	prometheus.MustRegister(GRPCConnTransientFailureCounter)
+	prometheus.MustRegister(TiKVTTLLifeTimeReachCounter)
 }
diff --git a/metrics/tikvclient.go b/metrics/tikvclient.go
@@ -240,4 +240,12 @@ var (
 			Buckets:   prometheus.ExponentialBuckets(0.001, 2, 24), // 1ms ~ 16777s
 			Help:      "tidb txn pessimistic lock keys duration",
 		})
+
+	TiKVTTLLifeTimeReachCounter = prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: "tidb",
+			Subsystem: "tikvclient",
+			Name:      "ttl_lifetime_reach_total",
+			Help:      "Counter of ttlManager live too long.",
+		})
 )
diff --git a/store/tikv/2pc.go b/store/tikv/2pc.go
@@ -703,6 +703,7 @@ func (tm *ttlManager) keepAlive(c *twoPhaseCommitter) {
 				// the key will not be locked forever.
 				logutil.Logger(context.Background()).Info("ttlManager live up to its lifetime",
 					zap.Uint64("txnStartTS", c.startTS))
+				metrics.TiKVTTLLifeTimeReachCounter.Inc()
 				return
 			}