What have you done to investigate memory leaks? What external connectors are you using, like MySQL or LDAP? 2009/4/27 Gerhard Schmidt <estartu@ze.tum.de>:
HI,
I've encounters a performance Problem with Zope. Some requests take very long time to process while others are served very fast. All request go for the URL. The time for the delayed Requests grows with the memory size of the Zope Process. It's direct proportional.
I have generated a chart showing the request times and memory size of the Zope Process. The chart can be found at http://etustar.ze.tum.de/frontend.jpg
Our watchdog system restarts the Zope Process when it reaches 7.3 Gig Memory. The physical memory of the server is 16 Gig and its only used for the zope Server. There are at least 7 Gig Memory free.
As you can see most of the requests are delivered within 2 seconds but some take up to 12 seconds. The Requests monitored are the request of our watchdog system. These requests are send approximately every 20 sec.
When I set the restart memory limit higher the request time of the delayed request continues to grows proportionally.
This server is part of a pool of 19 Servers. All are connected to one ZEO server. All show the same effect.
We observe the same effect with regular requests. Some are served at normal speed but some requests are delayed.
Any idea what causes this effect and how to fix it.
Greetings Gerhard Schmidt -- ------------------------------------------------- Gerhard Schmidt | E-Mail: schmidt@ze.tum.de TU-München | WWW & Online Services | Tel: 089/289-25270 | Fax: 089/289-25257 | PGP-Publickey auf Anfrage
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