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etcdserver: add "etcd_server_slow_read_indexes_total"

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Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
This commit is contained in:
Gyuho Lee 2018-07-02 12:53:01 -07:00
parent 82e670766a
commit 4481238224
2 changed files with 9 additions and 0 deletions
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7
etcdserver/metrics.go
View File

@ -71,6 +71,12 @@ var (
Name: "lease_expired_total",
Help: "The total number of expired leases.",
})
slowReadIndex = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "slow_read_indexes_total",
Help: "The total number of pending read indexes not in sync with leader's or timed out read index requests.",
})
currentVersion = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: "etcd",
Subsystem: "server",
@ -89,6 +95,7 @@ func init() {
prometheus.MustRegister(proposalsPending)
prometheus.MustRegister(proposalsFailed)
prometheus.MustRegister(leaseExpired)
prometheus.MustRegister(slowReadIndex)
prometheus.MustRegister(currentVersion)
currentVersion.With(prometheus.Labels{

2
etcdserver/v3_server.go
View File

@ -655,12 +655,14 @@ func (s *EtcdServer) linearizableReadLoop() {
id2 = binary.BigEndian.Uint64(rs.RequestCtx)
}
plog.Warningf("ignored out-of-date read index response; local node read indexes queueing up and waiting to be in sync with leader (request ID want %d, got %d)", id1, id2)
slowReadIndex.Inc()
}
case <-time.After(s.Cfg.ReqTimeout()):
plog.Warningf("timed out waiting for read index response")
nr.notify(ErrTimeout)
timeout = true
slowReadIndex.Inc()
case <-s.stopping:
return