https://bugzilla.wikimedia.org/show_bug.cgi?id=35891
Web browser: ---
Bug #: 35891
Summary: Site slow with memcached misconfigured
Product: MediaWiki
Version: 1.18.1
Platform: PC
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Unprioritized
Component: General/Unknown
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
Mobile Platform: ---
Created attachment 10405
--> https://bugzilla.wikimedia.org/attachment.cgi?id=10405
Valgrind compatible profile data from XDebug
Hi,
I fixed this problem, but it was difficult to diagnose. I configured my
MediaWiki installation to cache using memcached. Unfortunately I set the port
to find memcached on incorrectly (11212 instead of 11211). The end result was
that it took 10 seconds to load a page. I couldn't find any errors in the
logs, even though I turned on debug logging. Eventually I installed XDebug and
profiled the code. The result can be seen in the attachment. Basically all
the time is being spent in the php::sleep function inside of
MessageCache->lock.
Obviously, this was a misconfiguration error on my part, but it would be nice
if the error was detected and logged somehow.
Anyway, thanks for all the hard work on a great project!
Matt
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