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Zookeeper, mail # user - determining ZK latency issues


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Jun Rao 2013-08-08, 17:37
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Re: determining ZK latency issues
Martin Kou 2013-08-08, 18:18
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
>
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Neha Narkhede 2013-08-08, 18:40
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Thawan Kooburat 2013-08-09, 02:35
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Martin Kou 2013-08-09, 09:31