zookeeper-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Martin Kou <bitana...@gmail.com>
Subject Re: determining ZK latency issues
Date Thu, 08 Aug 2013 18:18:48 GMT
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 <junrao@gmail.com> 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
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message