Hi ANdreaT
Good news and bad news on the performance issue....
Bad news first:
It is the agilo plugin which causing the slowdown.
Good news:
a) It has nothing to do with agilo db schema or trac's simplicity etc.
b) We have a workaround and seems to work very well ( although, on a
project with _no_ agilo style tickets or linking... It was just two
trac instances, one with agilo enabled and the other one with agilo
disabled)
i) To investigate the performance issue, I tried using trac-admin
export command to see if there was any difference between the two
instances and there was none.
ii) Then I used Firebug plugin on firefox to see where the performance
difference was coming from. From the Net speed analysis, I found that
it was all the _static_ content that was causing the slowdown.
iii) A quick way to verify the above is to clear your web browser
cache and try loading the page (note the speed). Try it again the
speed would be slower ( if the server was configured the way we had)
iv) The way we had set things up _all_ requests went through trac/
mod_python handler and these included requests for company logo, trac
graphics, css ( almost anything under the "chrome" folder)
v) Our S/W guru, looked at the performance traces and said the work
around is as follows:
In our httpd.conf, he did the following changes
Alias /trac/chrome/common/ "/usr/lib/python2.5/site-packages/trac/
htdocs/"
Alias /trac/chrome/site/ "/var/tracdb/tracenv/htdocs/"
<Location "/trac/chrome/common">
SetHandler None
</Location>
<Location "/trac/chrome/site">
SetHandler None
</Location>
With the above changes, the static content did not go through
mod_python and hence the speed was vastly improved especially for the
agilo trac instance. Speed improvement was also seen for the non-agilo
enabled trac instance.
To make a long story, short, to improve agilo performance make sure
that the static content is server by apache and is not served by the
trac server
On _why_ exactly enabling agilo would slow down the serving of static
content, is left as an exercise to the reader :-)
Hope this helps.
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