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

Re: pitiful dav performance

From: Philip Martin <philip_at_codematters.co.uk>
Date: 2003-02-25 22:00:42 CET

Brandon Ehle <azverkan@yahoo.com> writes:

> >>>There are some known ra_dav performance issues, issue 773 in
> >>>particular. The first thing to determine is whether the problem is
> >>>excessive CPU use or whether it is some sort of IO problem.
>
> >>apache2 accumulated cpu time from a clean start and svn checkout, is
> >>listed as 9 seconds. Watching with top, the active apache2 thread sits
> >>around 1.8-3.8% cpu usage (which matches the 20x speed difference I am
> >>seeing between ra_svn and ra_dav), and every now and then I catch its cpu
> >>spiking up to 10% (very rare though). Memory is pretty low, with an
> >>occasional spike up to 20MB.
>
> This is a known bug of using Apache2 with DB-4.0.14

I disagree. I'm using BDB 4.0.14 and while ra_dav is slower than
ra_svn/ra_local it's nowhere near as bad as the dropoff reported
here. I know you regularly claim that BDB 4.0.14 is in some way
broken, but it's not universally true.

Anyway, in this case use Debian/testing and db4.1_recover have been
mentioned, so I assume BDB 4.1 is in use.

-- 
Philip Martin
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@subversion.tigris.org
For additional commands, e-mail: dev-help@subversion.tigris.org
Received on Tue Feb 25 22:01:33 2003

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