hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Todd Lipcon <t...@cloudera.com>
Subject Re: Heap fragmentation
Date Thu, 20 Jan 2011 18:39:39 GMT
On Thu, Jan 20, 2011 at 10:34 AM, Vladimir Rodionov <vrodionov@carrieriq.com
> wrote:

> BigMemory anyone?
>
> http://www.terracotta.org/bigmemory
>
>
Yea, something like that, minus the commercial license ;-)

-Todd
____

> From: Todd Lipcon [todd@cloudera.com]
> Sent: Thursday, January 20, 2011 9:33 AM
> To: dev
> Subject: Heap fragmentation
>
> 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
>



-- 
Todd Lipcon
Software Engineer, Cloudera

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message