Many Thanks! When I run my test Zope seem to reuse the memory now. I still don't understand why it is never released all together, but I can certainly live with reuse. Thanks again for your help. Andy

-----Original Message----- From: Dieter Maurer [mailto:dieter@handshake.de] Sent: Friday, January 07, 2005 3:39 PM To: Andy Yates Cc: zope@zope.org; andreas.jung@haufe.de Subject: [Bug] TemporaryStorage memory leak (was: RE: [Zope] Zope 2.7.3 Memory Leaks)

Andy Yates wrote at 2005-1-6 16:19 -0600:

...

... Can anybody else reproduce these results?

You have been right.

The leak is caused by a bug in "tempstorage.TemporaryStorage.TemporaryStorage._takeOutGarbage"

It performs the zero refcount check for a child of a deleted object *before* it has decremented the refcount. As a consequence, it does not release children of a deleted object.

I attach a script that reproduces the problem in an easier way. Calling it with "bin/zopectl run" will consume about 200 MB of RAM for about 5 min.

I also attach a patch.

I will file a bug report.

-- Dieter