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From "Michael Homeijer" <>
Subject Fw: Cocoon 2 RC2 performance disappointment
Date Fri, 23 Nov 2001 19:50:56 GMT
----- Original Message -----
From: "Michael Homeijer" <>
To: <>
Sent: Friday, November 23, 2001 8:38 PM
Subject: Cocoon 2 RC2 performance disappointment

> Hi,
> We built a site using Cocoon 1. Whe are now in the process of scaling the
> hardware so it can handle the requested amount of users.
> Next we started a project to perform migration to Cocoon 2. I think we use
> all mechanisms (at least the ones I know) to create a site that performs
> well. But... under heavy load, the performance of the Cocoon 1 site
> stable (slow but stable) and the Cocoon 2 site collapses. The initial
> performance of the Cocoon 2 site is higher, but under "heavy load", it
> not do very much anymore.
> Mechanisms we used:
> - Split pages in multiple parts based on caching posibilities. Ie. parts
> that can use the same cache strategies (ie same key and validity) are
> grouped together.
> - The parts that can be cached are also translated to HTML using XSL as
> as possible.
> - The XSL files are kept as small as possible. We tried to minimize the
> amount of templates (initially there were about 60 templates).
> This site should be our showcase and one of the most complex ones we will
> build because of the very dynamic nature of the site and high amount of
> personalisation based on countries, companies and user profiles. Most
> contain at least three to four calls to session beans.
> A quote from a report about the migration:
> "The expected performance improvement was not confirmed by the obtained
> results. Performance of the c2 site was dramatically lower than of the c1
> site. In 10 minutes, the c1 site was able to process 16283 catalogue
> requests and send out 6MB of pages, the c2 site managed 1011 requests and
> 400 kB."
> I could use some help tuning this site. Any suggestions are welcome.
> TIA,
> Michael Homeijer

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