On Friday 22 February 2002 08:59 pm, Jay Love wrote:
> Chuck-
>
> Am I seeing things, or are the sessions leaking memory again?
>
> Lower the session expiration time. Hit the CountVisits servlet
> several thousand times and watch the memory creep up. Then, as the
> sessions expire, I don't see the memory coming down like it should.
>
> Do you see this?
>
> Jay
Basically, yes, but read on:
I'm using SessionMemoryStore with a time out of 1 on Python 2.1.1 on
Linux with Webware cvs. I cleared out my Sessions/*.ses before
launching the app server.
The memory grew and after the sessions had expired (according the Admin
servlet), the memory was the same, which smells like a leak, BUT...
What's also interesting is that when I reran the test program, after
expirations, the memory didn't grow anymore except for a couple blips
(that came back down).
It was like Python would not let go of the memory it didn't need, but
it was certainly willing to reuse it.
On a third run, I got the same thing: just a little more creep. On the
4th run, no creep at all. On the 5th run, I lose 8K right away and then
another 8. On the 6th run, no creep at all.
I'm letting the sessions expire between runs.
So is this retain-but-reuse-memory a Python thing? A Linux thing?
WebKit?
My program is in CVS at:
Webware/WebKit/Research/TestForLeaks.py
Give it a spin. See what you think.
-Chuck
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