[Zope] zope performance issues

[Tiller, Michael (M.M.)]

While we are on the subject of zope performance issues, are all you Zope
people aware (I searched the mailing list and couldn't find mention of
it) that some people in the Plone community (including myself) have
taken to uncommenting a line in the AcceleratedHTTPCacheManager.py file
of Zope 2.7 because it seems to hamper caching in proxy servers?

I'm no expert so I don't know if this is a good "fix" or not (see
http://www.vasudevaservice.com/documentation/articles/plone_speed for
more details).  My main concern is that we don't have to resort to this
kind of hacking in the future and that an appropriate fix gets made in
Zope.  In my case, this change made an enormous difference when trying
to speed up my Plone site and so far I haven't really seen any adverse
effects.

Any comments?

--
Mike

> -----Original Message-----
> From: zope-bounces at zope.org [mailto:zope-bounces at zope.org] On Behalf
Of
> Paul Winkler
> Sent: Thursday, May 20, 2004 10:12 AM
> To: zope at zope.org
> Subject: Re: [Zope] zope performance issues
> 
> On Wed, May 19, 2004 at 07:49:43PM -0700, Trevor Warren wrote:
> >
> > --- Dieter Maurer <dieter at handshake.de> wrote:
> > > >Per Second with RAMCacheManager on???.
> > >
> > > Of course, this depends on how costly your rendering
> > > is...
> > [snip]
> >
> >  The content is just 3 DTML pages with static html
> > embedded in it. Nothing to fancy and no eye candy at
> > all.
> >
> >  RamCacheManager objects i used to cache all
> > images/dtml scripts. The statistics show that ONLY
> > DTML scripts got cached and no images...why????.
> 
> Read the Help text for RAMCacheManager.
> This is expected behavior.
> See lib/python/Products/StandardCacheManagers/help/RAM.stx
> or just click teh "Help" button in the ZMI.
> 
> > Ofcourse i would use a rever proxy/apache to do that
> > caching but would appreciate some clarity on the same.
> >
> >  There was abso no increase in performance with
> > RamCacheManager enabled for dtml scripts.
> 
> Not especially surprising since they weren't doing much
> work in the first place. At most you saved a little
> parsing time.
> RAMCacheManager is intended for things that are computationally
> expensive.
> 
> --
> 
> Paul Winkler
> http://www.slinkp.com
> 
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