[Zope] My Zope is leaking memory ... Still no luck.

[Jean-Francois.Doyon@CCRS.NRCan.gc.ca]

Hello everyone,

Well, I'm still not having any  luck tracking this down ... I've tried =
to
keep a nice and close eye on the top refcounts, but I'm not seeing =
anything
strange, the really big delta is on the DateTime object, as the =
refcount
seems to vary quite a bit, but the top one is fairly stable.

I will keep the LeakFinder as a last resort, as it rather dangrous to =
run
apparently :)

So, if the database object caching and refcounts are not the cause, =
what
else could it be?

So, a few questions: Could I possibly have written Python Code that =
would
leak memory? Keeping in mind I am in no way a Python wizard?
Otherwise, I'm going to turn my attention towards Psycopg, since it is
heavily used.  Anyone have experience running Zope with ZPsycopgDA, and =
has
had memory usage problems? The site makes several queries per second at
least, and each thread (6) opens I think 4 persistent database =
connnections.

I'm also wondering if the fact that I asked Psycopg to use Zope's =
internal
DateTime object instead of the mxDateTime one might be the cause, I'll =
try
to play with that ...

So if anyone has any more ideas about this, I'm open to anything!

Thanks a bunch,
J.F.

-----Original Message-----
From: Ausum Studio [mailto:ausum_studio@hotmail.com]
Sent: Monday, November 25, 2002 3:02 PM
To: zope@zope.org
Subject: Re: [Zope] My Zope is leaking memory ...


You may want to try Shane's LeakFinder:
http://www.zope.org/Members/hathawsh/LeakFinder



Ausum


----- Original Message -----
From: <Jean-Francois.Doyon@CCRS.NRCan.gc.ca>
To: <zope@zope.org>
Sent: Monday, November 25, 2002 1:56 PM
Subject: [Zope] My Zope is leaking memory ...


Hello,

Yup, that's right, my Zope is leaking memory, and so far, I've had no =
luck
figuring out where it might come from. I run a Zope 2.5.0 on RedHat =
7.3.

I started by looking into the Python/C type modules, which I fugred are =
most
likely to be causing this.  I upgraded Psycopg to the latest version, =
but
it's still occuring.  I also use the PIL, but it is seldom used, and =
could
not be the cause of the kind of leakage I'm seeing. Then there's a much =
more
obscure thing, which is a SWIG interface to PROJ.4 (A geographical
projection library) ... I had the author look at it, and no leaks were
detected in the C  library, or using the SWIG interface (Using Valgrind =
I
beleive).  My Z SQL Methods do NOT cache results (Maximum time set 0).

(...)

Any ideas, comments, insights, tips would be MOST appreciated!

Thanks in advance,

Jean-Fran=E7ois Doyon


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