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From Zhu Han <schumi....@gmail.com>
Subject Re: reduced cached mem; resident set size growth
Date Thu, 17 Mar 2011 02:27:50 GMT
On Thu, Feb 3, 2011 at 1:49 AM, Ryan King <ryan@twitter.com> wrote:

> On Wed, Feb 2, 2011 at 6:22 AM, Chris Burroughs
> <chris.burroughs@gmail.com> wrote:
> > On 01/28/2011 09:19 PM, Chris Burroughs wrote:
> >> Thanks Oleg and Zhu.  I swear that wasn't a new hotspot version when I
> >> checked, but that's obviously not the case.  I'll update one node to the
> >> latest as soon as I can and report back.
> >
> >
> > RSS over 48 hours with java 6 update 23:
> >
> > http://img716.imageshack.us/img716/5202/u2348hours.png
> >
> > I'll continue monitoring but RSS still appears to grow without bounds.
> > Zhu reported a similar problem with Ubuntu 10.04.  While possible, it
> > would seem seam extraordinary unlikely that there is a glibc or kernel
> > bug affecting us both.
>
> We're seeing a similar problem with one of our clusters (but over a
> longer time scale). Its possible that its not a leak, but just
> fragmentation. Unless you've told it otherwise, the jvm uses glibc's
> malloc implementation for off-heap allocations. We're currently
> running a test with jemalloc on one node to see if the problem goes
> away.
>

Ryan, does jemalloc solve the RSS growth problem in your test?

-ryan
>

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