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Posted to user@hbase.apache.org by abhishek1015 <ab...@gmail.com> on 2014/08/13 08:05:35 UTC

blockcache usage

Hello everyone,

I am wondering if someone has experimentally determined how much a 64 MB
block of hfile will occupy once it is loaded in block cache. I suppose some
overhead of storing as java object.   

Thanks
Abhishek



--
View this message in context: http://apache-hbase.679495.n3.nabble.com/blockcache-usage-tp4062639.html
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Re: blockcache usage

Posted by Anoop John <an...@gmail.com>.

Pls have a look at HFileBlock#heapSize()

You can know the overhead reading this.

-Anoop-

On Fri, Aug 15, 2014 at 1:50 AM, Nick Dimiduk <nd...@gmail.com> wrote:

> I'm not aware of specifically this experiment. You might have a look at our
> HeapSize interface and it's implementations for things like HFileBlock.
>
>
> On Tue, Aug 12, 2014 at 11:05 PM, abhishek1015 <ab...@gmail.com>
> wrote:
>
> > Hello everyone,
> >
> > I am wondering if someone has experimentally determined how much a 64 MB
> > block of hfile will occupy once it is loaded in block cache. I suppose
> some
> > overhead of storing as java object.
> >
> > Thanks
> > Abhishek
> >
> >
> >
> > --
> > View this message in context:
> > http://apache-hbase.679495.n3.nabble.com/blockcache-usage-tp4062639.html
> > Sent from the HBase User mailing list archive at Nabble.com.
> >
>

Re: blockcache usage

Posted by Nick Dimiduk <nd...@gmail.com>.

I'm not aware of specifically this experiment. You might have a look at our
HeapSize interface and it's implementations for things like HFileBlock.

On Tue, Aug 12, 2014 at 11:05 PM, abhishek1015 <ab...@gmail.com>
wrote:

> Hello everyone,
>
> I am wondering if someone has experimentally determined how much a 64 MB
> block of hfile will occupy once it is loaded in block cache. I suppose some
> overhead of storing as java object.
>
> Thanks
> Abhishek
>
>
>
> --
> View this message in context:
> http://apache-hbase.679495.n3.nabble.com/blockcache-usage-tp4062639.html
> Sent from the HBase User mailing list archive at Nabble.com.
>