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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Slow full-table scans
Date Sun, 12 Aug 2012 14:11:47 GMT
Gurjeet:
Can you tell us which HBase version you are using ?

Thanks

On Sun, Aug 12, 2012 at 5:32 AM, Gurjeet Singh <gurjeet@gmail.com> wrote:

> Thanks for the reply Stack. My comments are inline.
>
> > You've checked out the perf section of the refguide?
> >
> > http://hbase.apache.org/book.html#performance
>
> Yes. HBase has 8GB RAM both on my cluster as well as my dev machine.
> Both configurations are backed by SSDs and Hbase options are set to
>
> HBASE_OPTS="-ea -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode"
>
> The data that I am dealing with is static. The table never changes
> after the first load.
>
> Even some of my GET requests are taking up to a full 60 seconds when
> the row sizes reach ~10MB. In general, taking 5 seconds to fetch a
> single row (~1MB) seems a extremely high to me.
>
> Thanks again for your help.
>

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