Re: Isolated: Was: ModPython + Virtual Hosting Apache2 instance = poor performance.

On 8 March 2010 09:28, Christopher Sean Hilton <chris-7VRIiXHg8cFWk0Htik3J/[email protected]> wrote=
:
>
> On Mar 7, 2010, at 4:28 AM, Graham Dumpleton wrote:
>
>> FWIW, run mod_python with prefork Apache and with a configuration set
>> up for PHP and static file hosting alone is a bad idea. Read:
>>
>> =A0http://blog.dscpl.com.au/2009/03/load-spikes-and-excessive-memory-u=
sage.html
>>
>
> I found this and did understand it. The practical issue for me is confi=
guring FreeBSD to run with the Worker MPM but I can figure that out. In t=
he end the issue is the prefork MPM and I will switch to using mod_wsgi +=
 Worker MPM. But I still needed a short term solution. As far as this pro=
blem goes the earlier poster correctly identified it as a threading issue=
. I was able to rectify the performance issue by rebuild python w/out thr=
eads and rebuilding mod_python on top of the new python.
>
> In the future, if you want FreeBSD + Apache + Mod_Python you would be w=
ell served to build Python without threads or use a different combination=
 of tools to get the jog done.

You said you were using PHP, so you cant use worker MPM with Apache.
You can still use mod_wsgi with prefork MPM, just ensure you run WSGI
application in daemon mode of mod_wsgi to avoid issues discussed in
article. Do note though that you can't use mod_wsgi with a Python
installation which hasn't been compiled with thread support. You also
cannot use daemon mode with a APR library for Apache that doesn't have
thread support.

Rebuilding Python without threading should not cause such a dramatic
improvement especially considering I recollect you had only loaded
mod_python and not used it. I would suggest your rebuilding has seen
some other change. I also don't know what earlier post you are talking
about as there was no such post in this current thread on mod_python
list.

PS. I have cc'd this back on to the mod_python mailing list, please
keep the discussion there.

Graham