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Re: Trials with memcached

From: Daniel Shahaf <d.s_at_daniel.shahaf.name>
Date: Fri, 8 Jul 2011 02:59:12 +0300

This doesn't address memcached directly, but there has been a /lot/ of
work on server-side optimization and caching in 1.7 (also for
non-memcached-backed caches).

http://subversion.apache.org/docs/release-notes/1.7#server-performance-tuning

You might want to take 1.7.0-alpha3 for a spin...

Tony Butt wrote on Wed, Jul 06, 2011 at 15:20:27 +1000:
> We are running subversion 1.6.17 on a vmware hosted server. We recently
> reconfigured the server to give 4 virtual CPUs (up from 1), and a
> significant amount of memory.
>
>
> In order to spruce up our performance a little, I looked into the use of
> memcached with subversion again, found the correct config parameter, and
> set it up. Our server is running Ubuntu 10.04, Apache 2.2. Access
> mechanism is http (of course). The client used is running Ubuntu 11.04,
> and svn commandline (1.6.17 also)
>
> The results were interesting, to say the least.
>
> Checkout of a tree, about 250M in size:
>
> Without memcached, 1 1/2 to 2 minutes, varies with server load
> With memcached, 12 minutes (!)
>
> Update of the same tree,
> Without memcached, 9 seconds
> With memcached, 14 seconds - repeated several times, similar results.
>
> I am not sure what anyone else's experience is, but we will not be
> enabling memcached for subversion any time soon.
> --
> Tony Butt <tjb_at_cea.com.au>
> CEA Technologies
>
Received on 2011-07-08 01:59:55 CEST

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