SERVICES I have a PerlEx application that occasionally consumes a big chunk of 
memory. This is usually fine on my server. Watching task manager, I see 
an occasional spike to 600 or 800 MB. When the operation is over, the 
memory seems to be freed correctly since it always drops back to 300MB.

However, during stress testing, once in a while all three interpreters 
hit the same operation at the same time and the memory consumption (as 
shown by task manager) jumps over 900MB. At this point IIS freezes, 
refusing to accept any more connections and the PerlEx process appears 
to be hung as well since no CPU is being used and the memory consumption 
never goes down again until I restart IIS.

This is IIS 5 on Windows XP Professional.

This is perl, v5.8.8 built for MSWin32-x86-multi-thread
(with 33 registered patches, see perl -V for more detail)

Copyright 1987-2006, Larry Wall

Binary build 819 [267479] provided by ActiveState http://www.ActiveState.com
Built Aug 29 2006 12:42:41

The machine has 2GB of RAM. It is also running a SQL Server Express 
instance with which the Perl app is communicating.
The memory consuming operation makes use of ImageMagick to process 
images, if that makes a difference.

I am planning to put this application into production and can't afford 
to have IIS hang from time to time. Of course I will be delivering on 
IIS 6 with Windows 2003 server, so the situation might be different there.

Questions

1) could this happen on IIS 6 on Windows 2003 server?
2) is there some way of programming or configuring PerlEx to abort the 
current request before everything hangs?
3) failing that, can IIS restart PerlEx automatically if there is a problem?

Thanks In advance


-- 

Bryan M. Kramer
Email: bryan.kramer@[...].com <mailto:kramer@[...].com> 
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