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Re: Poor performance after upgrade to 1.4.5

From: Marvin Greenberg (P) <public.marvin_at_gmail.com>
Date: 2007-09-26 22:06:33 CEST

Norbert Unterberg wrote:
> 2007/9/25, marvingreenberg <public.marvin@gmail.com>:
>> We've upgraded to SVN 1.4.5, with apache 2.2.6, mod_dav_svn,
>> mod_authz_svn,
>> and bdb 4.6. We were running SVN 1.3.1 and apache 2.0.52, bdb 4.2.
>> This is
>> running on a FC3 box with 2.6.11, using source builds of svn, bdb,
>> apache,
>> and dependencies. [Hmmm... I just found a thread suggesting bdb 4.6
>> isn't
>> "officially" supported, although it seems expected to improve
>> performance]
>> We upgraded to get all the performance/stability improvements we were
>> supposed to get. But now when our build system does simultaneous
>> checkouts
>> (25 or 30 'svn co' from different hosts) the web server gets pegged,
>> and the
>> concurrent checkouts which used to take 10-15 minutes now take 4 hours.
>> Nothing unusual showing up in the logs or anywhere. Any suggestions
>> on what
>> might be happening, or what we can do to diagnose things? Our
>> repository is
>> about 13000 files, 80mb
> Try to add
> SVNPathAuthz off
> to the subversion section of your apache config file.
> Norbert
Thanks for the suggestion. We tried that, didn't appear to have any
noticeable effect. Here's another data point (actually 3). If I do a
single checkout of the whole repository it takes about 30s. If I do 2
at the same time, each takes 90s. If I do 8 at the same time it takes
20 minutes or so. (30 takes 4 hours from earlier experience.) The
server is a four processor (intel xeon 2.8ghz) with 4gb memory. And the
total size of the db 'strings' file of the repository is 2.0GB or so.
We are checking out a HEAD revision.


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Received on Wed Sep 26 22:07:26 2007

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