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From Ted Dunning <tdunn...@maprtech.com>
Subject Re: Heap fragmentation
Date Thu, 20 Jan 2011 17:48:17 GMT
Nice work Todd.

Were these numbers extracted using jconsole?

On Thu, Jan 20, 2011 at 9:33 AM, Todd Lipcon <todd@cloudera.com> wrote:

> I did some experiments to understand our full GC issues better last night.
> Here are the results:
> http://people.apache.org/~todd/hbase-fragmentation/
>
> <http://people.apache.org/~todd/hbase-fragmentation/>Basically my
> conclusion
> here is that (for these YCSB workloads) the memstore is way worse for heap
> fragmentation than the block cache.
>
> Also we now have some tools and reference for comparison if we make any
> changes to memstore to try to combat this issue.
>
> -Todd
> --
> Todd Lipcon
> Software Engineer, Cloudera
>

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