Hello, Well, I tried to look at the PythonScript issue, and it looks like there's definitely something "odd" going on here ... As Jo suggested, I tried "cleaning out" my variables at the end of my Python Scripts ... I didn't do this for ALL of them though, just the most used ones, which actually aren't CMF related (Search Engine is one) ... And now what happens is the memory grows, BUT, at some point, the Zope process DIES with a SIG11 (Aieeee!), restarts, and voila, of course, the memory is clean. This I suppose is a blessing is disguise, as I don't have to keep an eye on it anymore, I can actually rely on a SIG11 occuring and restarting the leaking process for me !!! But this to me indicates some worrying problems with the PythonScript implementation. Although I have looked everywhere else for the source of my memory leak, this is the best candidate yet. I even looked at this document: http://www.zope.org/Members/mcdonc/HowTos/PreventAndDebugMemLeaks and looked through my scripts for global variables that don't get reset, and circular references, but not luck ... I am confused about the following statements though: "DO use REQUEST.set and REQUEST.__setitem__ sparingly." "DONT stuff things that are acquisition-wrapped into REQUEST or into a session, or into any other object that is transient." What does that mean exactly? :) I don't use SESSION's , but I like to stuff things into my REQUEST object indeed quite a bit. Could this be it? And if so ... out of pure curiosity, why is this bad? I have found using dtml-let to be awkward to use at times ... and "DO use global variables sparingly." "DONT stuff things into a global variable without later clearing or deleting the variable." Global in reference to what ? :) In my External Methods, I have no global variables, that is no variables that don't belong inside a def'ed function (and allways "reset" before being used) ... In PythonScripts themselves, I think I NEVER use functions, just straight code, so by definition all variables ARE global to that script ... Is this bad? Thanks again to everyone for the help and comments! J.F. -----Original Message----- From: Jo Meder [mailto:jo@meder.de] Sent: Friday, November 29, 2002 5:29 PM To: Jean-Francois.Doyon@ccrs.nrcan.gc.ca Cc: zope@zope.org Subject: Re: [Zope] My Zope is leaking memory ... Still no luck. Am 29.11.2002, 21:06 Uhr schrob Jean-Francois.Doyon@CCRS.NRCan.gc.ca <Jean-Francois.Doyon@CCRS.NRCan.gc.ca>: [Forcing transient objects to be deleted at end of PythonScripts to avoid memory leaks]

Really? Wow, you'd think such a required behavior would be documented ... Unless I missed it somewhere.

AFAIK it isn't documented and IMHO it's a bug anyway, so I suppose it should not be documented but solved. Sigh. So much to do and so little time.

I do indeed use quite a bit of Python Scripts ... Problem is many of them are part of the CMF ...

Perhaps we have a pattern here. Just like you we use CMF, but we started with an older version (that was mostly DTML and only some PythonScripts) and have since then rewritten or at least changed almost everything in the skins folders. One problem wrt to the memory leaks we have not solved yet: When we refresh one of our products that is part of our CMS Zope starts to leak memory like there's no tomorrow. Restarting Zope immediately stops this.

I really don't want to have to go through every bit of python script I have to do this, and would much prefer finding the root cause!

If you have any success, even clues or insights: I'd very much appreciate it if you kept me (or the list, of course) posted. Jo. -- Internetmanufaktur Jo Meder ---------------------- Berlin, Germany http://www.meder.de/ ------------------- fon: ++49-30-417 17 63 33 Kollwitzstr. 75 ------------------------ fax: ++49-30-417 17 63 45 10435 Berlin --------------------------- mob: ++49-170- 2 98 89 97 Public GnuPG-Key ---------- http://www.meder.de/keys/jo-pubkey.txt