Webware for Python

Part of my question is probably na=EFve, but please bear with me.  The
ThreadedAppServer process is, umm THREADED.  But on Linux (at least =
prior to
RedHat 9.0),  threads are in fact lightweight processes.  The behavior =
that
I see is that almost every one of the thread/processes has exactly the =
same
virtaual size and same shared size and same resident-set size.  This =
leads
to the first question:

	Does each thread consume the amount of memory it's reported to be
using?

And then a specific question.  I'm running RedHat 7.3, Webware 0.8, and
Python 2.2, Apache 1.3.2x, mod_webkit adapter.  I have the Min, Max, =
and
Start threads  parameters set the same (to 30).  When I run the =
ThreadedApp,
ps reports that each thread is using 288MB virtual, with a resident-set =
size
of 22340.  Running top, on the other hand, shows that each thread is =
22MB
with resident-set size of 21MB.  The free command (and the headers for =
top)
show that I'm only using about 520 MB of real memory; lots of real =
memory is
untouched, and swap has never been touched.  This leads to my second
question:

	Am I misinterpreting something about these numbers?  What's the true
memory usage of the appserver?

Thanks for any insight you can offer.

Cheers!
--
David Hancock | dhancock@... | 410-266-4384

Re: [Webware-discuss] Webware process sizes From: <tshumway@jd...> - 2003-04-09 05:55 Quoting "Hancock, David (DHANCOCK)" <DHANCOCK@...>: > Does each thread consume the amount of memory it's reported to be > using? Yes, but all of the threads consume (share) the same memory, so just count it once. > Start threads parameters set the same (to 30). When I run the ThreadedApp, > ps reports that each thread is using 288MB virtual, with a resident-set size > of 22340. wow! ???? > Running top, on the other hand, shows that each thread is 22MB > with resident-set size of 21MB. In this case, I would be more inclined to believe top. Or try $ cat /proc/{insert pid here}/status to get a more readable version of the info ps is presenting.

Re: [Webware-discuss] Webware process sizes From: Jason Hildebrand <jason@pe...> - 2003-04-09 16:05 On Tue, 2003-04-08 at 21:13, Hancock, David (DHANCOCK) wrote: > Part of my question is probably naïve, but please bear with me. The > ThreadedAppServer process is, umm THREADED. But on Linux (at least > prior to RedHat 9.0), threads are in fact lightweight processes. The > behavior that I see is that almost every one of the thread/processes > has exactly the same virtaual size and same shared size and same > resident-set size. This leads to the first question: > > Does each thread consume the amount of memory it's reported to > be using? No, threads run in a _shared_ address space. So don't multiply the virtual size by the number of threads... it just looks that way. > And then a specific question. I'm running RedHat 7.3, Webware 0.8, > and Python 2.2, Apache 1.3.2x, mod_webkit adapter. I have the Min, > Max, and Start threads parameters set the same (to 30). When I run > the ThreadedApp, ps reports that each thread is using 288MB virtual, > with a resident-set size of 22340. Running top, on the other hand, > shows that each thread is 22MB with resident-set size of 21MB. The > free command (and the headers for top) show that I'm only using about > 520 MB of real memory; lots of real memory is untouched, and swap has > never been touched. This leads to my second question: > > Am I misinterpreting something about these numbers? What's > the true memory usage of the appserver? The 22MB is shared by all threads in the process. So the total memory usage is 22MB. -- Jason D. Hildebrand jason@...

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