[pmwiki-users] Help! Performance problem after server move

Robin Hills robin at bitbybitsystems.ca
Wed Apr 5 11:14:10 CDT 2006


Patrick R. Michaud wrote:

> Out of curiosity, how many pages do you have on your site?

Roughly 3,700 pages. Hans might be interested to know that over half are 
in the forum. That discussion forum took on a life of its own and I have 
it set to read-only at the moment until we settle in and see how things 
are going to run.

Rob

> 
> Pm
> 
> 
> 
> 
>>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
>>>>>http://www.pmichaud.com/pipermail/pmwiki-users/2006-March/025470.html.
>>>>>    
>>>>>
>>>>
>>>>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.
>>>
>>>Pm
>>>
>>>_______________________________________________
>>>pmwiki-users mailing list
>>>pmwiki-users at pmichaud.com
>>>http://host.pmichaud.com/mailman/listinfo/pmwiki-users
>>>
>>>
>>>
>>
> 





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