[rt-users] RT4 slowness

[Kevin Falcone]

On Wed, Jun 01, 2011 at 11:43:30AM +0200, L B wrote:
> On Wed, Jun 1, 2011 at 9:52 AM, L B <bertignac at gmail.com> wrote:
> > This amazing patch fixed the issue, so it has something to do with the minifier:
> >
> > --- lib/RT/Squish/JS.pm.orig    2011-06-01 07:50:27.510862133 +0000
> > +++ lib/RT/Squish/JS.pm 2011-06-01 07:45:55.096115642 +0000
> > @@ -110,7 +110,7 @@
> >             $RT::Logger->debug("can't load JavaScript::Minifier: $@");
> >         }
> >         else {
> > -            $content = JavaScript::Minifier::minify( input => $content );
> > +            #$content = JavaScript::Minifier::minify( input => $content );
> >         }
> >     }
> >     return $content;
> >
> > --
> > L.B.
> >
> 
> But it doesn't solve the slowness for Display.html page. Displaying a
> ticket still need the 7seconds.

All this patch will do is solve the once per child slowness of
squishing the JS by reverting to simple concatenation.  Children
should be answering multiple requests before being reaped and needing
to resquish.

If you're seeing this JS related slowness on every page, it points to
other problems.

Please provide details about your installation such as your apache
versions and configuration otherwise it's quite difficult to
test.  We've tried replicating in house, but haven't seen this in any
of our test or production RT4 instances.

If you're seeing particular slowness on a given page, RT4 contains a
new feature to allow you (as an admin) to see if there are particular
SQL statements causing problems.  Because it is debugging, it will
cause other slowness in RT and should not be left on, but StatementLog
will expose queries in the admin UI and allow you to see if something
needs indexing or optimization.

-kevin
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