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Subject: Re: DirectoryScanner performance
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	<ab8e556c0809182141pfa4b7b5i714fb16d5cce9856@mail.gmail.com>
From: Stefan Bodewig <bodewig@apache.org>
Date: Fri, 19 Sep 2008 09:53:05 +0200
In-Reply-To: <ab8e556c0809182141pfa4b7b5i714fb16d5cce9856@mail.gmail.com>
 (Kevin Jackson's message of "Fri\, 19 Sep 2008 05\:41\:48 +0100")
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On Fri, 19 Sep 2008, Kevin Jackson <foamdino@gmail.com> wrote:

> Hi,
>> At the same time memory usage has increased with 1.7.0 and never
>> decreased after that, in fact the current HEAD uses more memory
>> than ever before.  Something between revisions 687768 and 693846
>> has bumped the memory mark without gaining us much in terms of
>> performance, I'll try to isolate and remove that later.
> 
> This is an issue.

Absolutely.

> Looking at your results, memory has significantly increased
> somewhere and for large builds we were already causing OutOfMemory
> errors.

I'll be working on this and now have a self-contained testbed (and I
invite others to use the tests on their systems to see whether they
get different results).  Getting memory consumption at least down to
where it was with 1.7.1 is my goal.

OTOH my clumsy method of measuring memory consumption (watching task
manager or top) doesn't tell us the full story since it only shows the
peak memory consumption and after a GC things may look differently
inside of the VM.

Stefan

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