Long delay after submitting an edit - Wikitech-l

8 Sep 2006

Wotcher

I've been experiencing major delays on our MediaWiki 1.6.7 and 1.7.1
installation when submitting edits.  After clicking "Save Page", there's
a delay of around 16 seconds before the user is redirected to the edited
page.

I've enabled profiling (logs attached), and it looks like the submission
of the edit and the generation of the newly-created page take a total of
0.8 seconds. I'm wondering what the sam hell the thing is up to for the
other 15.2.

I'm running Windows 2003 x64 R2, Apache 2.0.58, PHP 5.1.4 and MySQL
5.0.19.  Things I've tried:

    PHP 5.1.6 (apache2handler)
    MySQL client 4.1.7 and 5.0.24a
    Win32DisableAcceptEx in Apache
    Enabled transactions
    Disabled ENOTIF
    $wgNoOutputBuffer = true
    Disabled $wgCheckDBSchema
    Changed $wgArticlePath to the querystring style and back again

Nothing helps.  I've added a timestamp to the "Start Request" profiling
function, and if you examine the log, you'll notice the delay seems to
come at "User::loadFromSession() successfully saved user", after which a
new GET request starts.

If anyone can shed any light on what's happening here, I'd be grateful.

TIAFYT,

Chris