Do you see fsync() warnings in your ZooKeeper log? It could be disk writes taking too long.
Best Regards, Martin Kou On Thu, Aug 8, 2013 at 10:37 AM, Jun Rao <[email protected]> wrote: > Hi, > > We have a 3-node ZK cluster running 3.3.4 that are experiencing high > latency. From "stat", we saw avg latency to be 300-400ms consistently. > Outstanding requests jumps to ~600 from time to time. However, the server's > I/O and CPU are both low. If I start a new ZK client and do a few writes, > the observed response time in the client is also low (1ms). > > What's the best way to figure out why the reported latency in ZK server is > high? Also, are min/avg/max latency computed on a rolling time window? > > Thanks, > > Jun >
