[pmwiki-users] Help! Performance problem after server move
Patrick R. Michaud
pmichaud at pobox.com
Wed Apr 5 11:02:25 CDT 2006
On Wed, Apr 05, 2006 at 12:00:35PM -0400, Robin Hills wrote:
> Since I started this thread, it would be nice if I could report a
> specific resolution to the problem but I can't. We're now on a
> completely different server running on Windows 2003. I have some issues
> to look at but we've had 1400 visitors in ten hours and the lights are
> still on so I'm in much better shape than I was. Except that I really
> need some sleep and a day off.
I'm very glad to hear the site is running again. I did a lot of
work yesterday looking at ways to potentially speed up PmWiki itself
but didn't come across anything specific.
> I reported back to the previous host that it might be an issue related
> to Apache. I doubt that I'll hear anything more about it.
Out of curiosity, how many pages do you have on your site?
> Patrick R. Michaud wrote:
> >On Tue, Apr 04, 2006 at 11:19:33PM +0200, Joachim Durchholz wrote:
> >>Patrick R. Michaud schrieb:
> >>>I'm fairly
> >>>convinced it's not directly PmWiki's fault, because it happens very
> >>>inconsistently. For more details -- see my message at
> >>Now that "happens very inconsistently" triggered something in my mind.
> >>I know of one thing that happens at random intervals in PHP: session GC.
> >>With the standard settings, it is run with a 1% probability - very
> >>difficult to reproduce any problems with that.
> >I'm pretty certain the problem isn't session GC. Although session GC
> >does occur randomly (with a 1% probability), when it does occur
> >it always happens at session initialization time -- i.e., when
> >session_start() is executed. In PmWiki (on pmwiki.org), this
> >would have to be during calls to RetrieveAuthPage.
> >The testing I've been doing is pretty fine grained--well below
> >the function-call level. So, if the delays were consistently
> >occurring as part of session initialization (i.e., during
> >page authorization), I could narrow it down pretty quickly
> >to that. But that's not what I'm seeing -- the delays occur
> >at different times in pmwiki processing.
> >Also, I see the slow processing times even when no session
> >handling is taking place. So, I'm pretty sure it must
> >be something else.
> >pmwiki-users mailing list
> >pmwiki-users at pmichaud.com
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