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From Azuryy Yu <azury...@gmail.com>
Subject Re: 答复: flushing + compactions after config change
Date Thu, 27 Jun 2013 14:53:27 GMT
your JVM options arenot enough. I will give you some detail when I go back
office tomorrow.

--Send from my Sony mobile.
On Jun 27, 2013 6:09 PM, "Viral Bajaria" <viral.bajaria@gmail.com> wrote:

> I do have a heavy write operation going on. Actually heavy is relative. Not
> all tables/regions are seeing the same amount of writes at the same time.
> There is definitely a burst of writes that can happen on some regions. In
> addition to that there are some processing jobs which play catch up and
> could be processing data in the past and they could have more heavy write
> operations.
>
> I think my main problem is, my writes are well distributed across regions.
> A batch of puts most probably end up hitting every region since they get
> distributed fairly well. In that scenario, I am guessing I get a lot of
> WALs though I am just speculating.
>
> Regarding the JVM options (minus some settings for remote profiling):
> -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -verbose:gc
> -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation
> -XX:NumberOfGCLogFiles=1 -XX:GCLogFileSize=512M
>
> On Thu, Jun 27, 2013 at 2:48 AM, Azuryy Yu <azuryyyu@gmail.com> wrote:
>
> > Can you paste your JVM options here? and Do you have an extensive write
> on
> > your hbase cluster?
> >
>

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