On Thu, Jun 14, 2012 at 2:06 PM, Justin Erenkrantz <jus...@erenkrantz.com> wrote: > I checked the wireshark traffic on a checkout and it looks like all > the right headers are set - with this patch, we now have > Cache-Control, ETag, and Last-Modified all set. When mod_deflate is > run, it'll set the appropriate vary headers so that should all just > work too. -- justin
I enabled the httpd caching locally (mod_disk_cache) on my laptop and ran some quick tests. Below are 'time' output for a checkout of SVN trunk and the server CPU usage as reported by mod_status. To be clear, this leveraging of the caching isn't specific to httpd - you could also stick varnish or even Fastly or some other CDN in front of it if you really wanted to spread the load. But, given that mod_dav_svn is an httpd module, this allows the origins to have their I/O reduced. -- justin No mod_cache: Client timing: svn co svn-age-1 1.77s user 2.97s system 16% cpu 28.070 total Server CPU usage: CPU Usage: u2.98 s.59 cu0 cs0 - 6.87% CPU load (2.98s of user time plus .59 seconds of system time.) Cold mod_cache: Client timing: svn co svn-age-1 1.88s user 3.27s system 14% cpu 36.004 total CPU Usage: u3.39 s2.58 cu0 cs0 - 3.34% CPU load (The sys% increase is due to writing out the cache files to disk.) Warm mod_cache: Client timing: svn co svn-age-1 1.66s user 2.70s system 24% cpu 17.454 total Server CPU Usage: u1.24 s.72 cu0 cs0 - 4.26% CPU load (Note the decreased user time.) httpd config notes: # Enable mod_deflate - add within appropriate <Location> block SetOutputFilter DEFLATE # Enable mod_disk_cache CacheEnable disk /svn-test-work/repositories CacheRoot /tmp/cacheroot # Turn on CPU tracking within mod_status ExtendedStatus on <Location /server-status> SetHandler server-status </Location>
