[svn.haxx.se] · SVN Dev · SVN Users · SVN Org · TSVN Dev · TSVN Users · Subclipse Dev · Subclipse Users · this month's index

Re: Performance Results on Windows

From: Stefan Fuhrmann <stefan.fuhrmann_at_wandisco.com>
Date: Wed, 23 Jul 2014 15:19:46 +0200

Updated and final results:

* svnadmin dump results now included, f6 / f7 is +/-20%

* fixed anomaly with ra_serf, results consistent with previous findings
  'null-export' tests have been rerun and old results been replaced

* added a page on how 'null-export' reacts on cache configuration
  to get a better picture of how cache size, ra layer and block-read
  interact when caches are hot. Data for small or cold caches has
  already been in covered in other tests.

-- Stefan^2.

On Mon, Jul 14, 2014 at 1:54 AM, Stefan Fuhrmann
<stefan.fuhrmann_at_wandisco.com> wrote:
> After almost a week of continuous measurements and 4320
> individual data point, the results are in now. Summary:
> * on cold disks, 'svn log -v' is 2x..3x as fast with packed f7 than with
> packed f6 in default config and up to 8x with advanced options
> * on cold disks, 'svn export' with packed f7 is 40%.50% faster in
> default config and 2x as fast with advanced options
> * ra_serf has an anomaly making "fast" config up to 100x slower
> than ra_svn - independent of repo format
> Details to how I set up the repositories and measurements plus
> the rationale behind it can be found in our wiki:
> https://wiki.apache.org/subversion/MeasuringRepositoryPerformance
> Tools and test script have been committed in r1610264. System
> setup is close to what Ivan used in his tests, except for having
> 4GB to accommodate the much larger BSD repo as well.
> Original measurement log and detailed results can be found in the
> .zip file attached. The spreadsheet has been upgraded and now
> displays f6/f7 because "+400%" is easier to understand than "-80%".
> It now also highlights data cells with particularly high variation.
> I'm currently waiting for the 'svnadmin dump' results to come in.
> Those will take about 3 days but the expectation is that packed f7
> may be slightly slower here due to the "unusual" access pattern.
> After that, I'll try to isolate the trigger for the ra_serf anomaly.
> -- Stefan^2.

Received on 2014-07-23 15:20:22 CEST

This is an archived mail posted to the Subversion Dev mailing list.

This site is subject to the Apache Privacy Policy and the Apache Public Forum Archive Policy.