I've noticed what I believe are "request leaks" if any variety of CMF is involved in a request though I haven't tracked this down. The symptoms are that every request causes the HTTPRequest class to have its reference count increased by one, plus a bunch of other objects are leaked because the request that was leaked apparently continues to hold on to references to them. This may or may not be what you are seeing. If you want to track something like this down, there is really no shortcut. My strategy (which I've never successfully used to actually fix a leak, mind you! ;-) is this: - Confirm that bare Zope doesn't leak by testing refcounts before and after you load the quickstart page several times (remember to clear the ZODB cache before you start hitting the site whenever trying to test refcounts). Look at the number of references to all classes in the Debug tab. These references should not normally grow on every request. - Do same for one of your "domain" objects. If you see leakage when trying this against a method of one of your domain objects, a binary-exclusion method is usually the only way to pin down the leak. Prevent half of the code that gets run when your domain object method is called from running. If you still see the leak, the leak happens in the code you didn't prevent from running. If you did, the leak happens in the code that ran. And so forth. It's tedious and time-consuming, which is probably why I've never successfully used it to fix a leak. ;-) - C On Sun, 2004-09-12 at 01:33, Dennis Allison wrote:
Pound-current (V 1.7+) Zope 2.6.4 Python 2.3.4 RH 7.3 Dual Athalon processors
Occasionally, I see Zope gathering very large amounts of real memory. Normally buffering and the like seems to stabalize at around 500MB on a 4GB memory dual processor machine, but occasionally grows to 2.5GB or more. At the same time, CPU usage tends to fully occupy one of the processors for the threads holding all the memory. Clearly there is a problem. Any hints as to where to track down the problem?
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