Do you see fsync() warnings in your ZooKeeper log? It could be disk writes
taking too long.
On Thu, Aug 8, 2013 at 10:37 AM, Jun Rao <[EMAIL PROTECTED]> wrote:
> 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?