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subversion _really_ slow

From: Marton Fabo <morton_at_eik.bme.hu>
Date: 2005-02-09 12:08:35 CET


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?


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
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.


The two basic principles of Windows system administration:
     * For minor problems, reboot
     * For major problems, reinstall
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Received on Wed Feb 9 12:08:02 2005

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