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Re: subversion _really_ slow

From: <kfogel_at_collab.net>
Date: 2005-02-13 03:35:55 CET

Thanks for the detailed description.

This is unexpectedly slow behavior. However, I'm not sure how to
reproduce it, since, clearly, it's not being that slow for any of the
developers :-(. The fact that it's unpredictable is also strange.

What kind of repository back end are you using -- BDB, or FSFS? If
you switch it, does that change anything?


Marton Fabo <morton@eik.bme.hu> writes:
> I have a really unacceptable performance problem with subversion. I have
> searched the mailing lists for reports of similar problems, but I have
> not found any valuable information.
> We have a Linux file server running svnserve, with a repository holding
> around 60000 files. We also have a Linux development machine. We are
> using the command-line client for accessing the repository through
> svn:// URLs.
> On one branch, we made a change of modifying, adding and deleting of
> binary files, amounting to about 4000 items in total, and around 20 MB.
> Checking that change in took about 1.5-2 hours. Then we tried to merge
> those changes to another branch, which took almost 4 hours, but finally
> succeeded. Committing that back is still in progress, for almost 7 (!)
> hours, and it has processed around 1000 items out of the 4000 so far.
> However, it doesn't seem to have totally locked up, as every once in a
> while it advances a few files.
> Both the server and the client machines are mostly idle otherwise, they
> are not running other tasks that would influence performance. Both
> machines constantly run with CPU usage close to zero. The svnserve
> process uses virtually no memory, and the client uses around 70 MB, so I
> don't suspect memory trashing.
> Also, this behaviour seems to be quite unpredictable; during the course
> of using subversion on various test repositories of the same sources,
> sometimes it's performing acceptably (relative to what one may expect
> using such a large repository), sometimes it seemed totally hung up,
> only killable using kill -9, and leaving mysterious repository and
> working copy inconsistencies behind.
> Has anyone experienced any similar performance problems? Is this
> behaviour expectable with the mentioned transactions in our environment?
> Details:
> The svn binaries are version 1.1.1 (r11581) on both the server and the
> client, compiled locally.
> The client is running Linux kernel version 2.4.22-1.2115.nptl (Fedora
> Core 1) on a 3.2 GHz Intel PIV machine with 1 GB of RAM. Hard disk: SATA
> UDMA/133.
> The server is running kernel 2.4.21-27.TL (Tao Linux rel. 1) on a 1.6
> GHz PIV with 512 MB of RAM. Hard disk is ATA UDMA/100 connected.
> The two are connected on otherwise mostly idle 100 Mbit local network.
> thx
> mortee
> --
> The two basic principles of Windows system administration:
> * For minor problems, reboot
> * For major problems, reinstall
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Received on Sun Feb 13 03:52:36 2005

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