[Zope] Urgent help needed: Zope falls over under moderate load

[Michael Fraase]

Thanks Chris,

I've cached what I can find. The only page that's cacheable is
index_html; the pages being hit are another layer deeper in the
hierarchy. I've also cached all of the page elements (images, header,
footer) I could find.

--
Michael Fraase
ARTS & FARCES LLC
mfraase@farces.com
www.farces.com
PGP Fingerprint:
3D85 F3F4 9E65 4949 176A  260C CB47 190D C864 9A96

> -----Original Message-----
> From: Chris McDonough [mailto:chrism@zope.com] 
> Sent: Tuesday, November 20, 2001 12:11 PM
> To: mfraase@farces.com; zope@zope.org
> Subject: Re: [Zope] Urgent help needed: Zope falls over under 
> moderate load
> 
> 
> Your clients maybe *should* laugh at you if you're not doing 
> any caching.  ;-)
> 
> To cache, you have two options.
> 
> Use Zope's RAM Cache Manager to do caching.  As a result, the 
> pages you choose to cache will be cached in RAM and won't be 
> regenerated on each request.
> 
> - OR -
> 
> Use a caching web server in front of Zope to bear the brunt 
> of the load in conjunction with (perhaps) the HTTP 
> Accelerated Cache Manager stuff in Zope.  In this case, your 
> web server (or proxy) keeps a copy of a pregenerated page and 
> serves it out to requestors instead of continually asking 
> Zope to regenerate it.
> 
> One of these is going to be necessary for any sort of 
> high-traffic site.  Zope can't keep up when it needs to 
> dynamically generate content; you need to help it out by 
> doing some kind of caching.
> 
> If you don't or can't use Cache Managers, but you still want 
> to use an HTTP caching proxy in front of your Zope site, 
> you'll need to make each of the pages you want to cache has 
> an "Expires" and "Last Modified" header.  You may do this by 
> using RESPONSE.setHeader if you're not using a cache manager. 
>  If you're behind Apache, you can use mod_proxy with caching 
> turned on.
> 
> See http://www.zope.org/SiteIndex/search?text_content=caching 
> for more information.
> 
> I've also found the document about mod_perl and headers at 
> http://perl.apache.org/guide/correct_headers.html helpful... 
> there are lots of other nuggets in that document as well.
> 
> HTH,
> 
> - C
> 
> 
> 
> ----- Original Message -----
> From: "Michael Fraase" <mfraase@farces.com>
> To: <zope@zope.org>
> Sent: Tuesday, November 20, 2001 12:39 PM
> Subject: [Zope] Urgent help needed: Zope falls over under 
> moderate load
> 
> 
> > So yesterday my site got slashdotted. Zope fell over within minutes.
> A
> > day later it's still falling over within an hour or so.
> >
> > I have 512Kb DSL (the outbound channel is 512Kb; the inbound channel
> is
> > 768Kb). I figured that bandwidth would be saturated or that Windows
> 2000
> > Pro would melt long before Zope would fail, but that has proven not
> to
> > be the case.
> >
> > Here's the particulars of my installation:
> >
> > Pentium III 850MHz with 768Mb RAM
> > MS Windows 2000 Pro with current patches and service packs 
> Zope 2.4.3 
> > running as a service Squishdot 1.3.0
> > 512Kb bandwidth
> >
> > Here's the registry start parameters:
> >
> > "C:\PROGRA~1\FARCES~1\bin\python.exe"
> "C:\PROGRA~1\FARCES~1\z2.py" -S
> > -w80 -W9800
> >
> > I don't know what the -S is; -w80 sets the port Zope's web server 
> > listens on; and -W9800 sets the WebDAV port.
> >
> > Zope just shuts down and closes port 80 on what seems to be very 
> > moderate load. We're talking a peak of less than 60,000 hits, a peak
> of
> > 125Mb bandwidth usage, just over 58,000 page views, and a peak of
> 4013
> > visitors.
> >
> > What I've been doing is to manually stop the Zope service and
> restart
> > it, but that's ridiculous. At this rate, clients are going to laugh
> at
> > me when I suggest using Zope for a web project.
> >
> > Anyone have any ideas? I'm digestified, so please cc me in any
> response.
> >
> > Thanks kindly.
> >
> > --
> > Michael Fraase
> > ARTS & FARCES LLC
> > mfraase@farces.com
> > www.farces.com
> > PGP Fingerprint:
> > 3D85 F3F4 9E65 4949 176A  260C CB47 190D C864 9A96
> >
> >
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