I'm not sure I would get hung up on what windows task manager reports vs.
the server monitor or Jprofiler. 

Looking at this log it appears that the number of simultaneous requests is
set at 25.  When 25 is reached all other threads begin to queue. It goes
from 0/5 (0 "running requests" out of 5 total) to 25/57 (25 running requests
and 57 threads total). Whatever happened basically "Froze" all requests and
is keeping them from completing. Typical culprits are the database server,
driver and/or network.  Eventually all these threads hung or queued will
kill your memory - but that does not mean you have a memory issue. The
question to ask is - why are my threads queuing? Your memory may well be
adequate if you can solve the mystery of the hanging requests :) The server
monitor should give you some clues - but if "everything" is failing all at
once the problem is likely something very global that affects every request
- like the NIC card resynching it's speed or the DB server being unavailable
temporarily or a file system that is having IO problems. 

 


Mark A. Kruger, CFG, MCSE
(402) 408-3733 ext 105
www.cfwebtools.com
www.coldfusionmuse.com
www.necfug.com

-----Original Message-----
From: Alex DeMarco [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, March 25, 2008 9:15 AM
To: CF-Talk
Subject: Re: Memory discrepancy

> We are running CFMX 8 in a Jrun4 (updater7) instance using java 1.6 
> under Win2k3.
> 
> When I run the Server Monitor or even Jprofiler on the instance for 
> example they both report 125,000 in use.  However, when I look at 
> Windows Task Manager the Jrun process reports around 225,000.  Why the 
> difference? One of the things we have noticed is that over time the 
> amount windows reports grows.  Yet internally it does not.
> 
> Anyone seen this behavior?  Any ideas what is going on?
> 
> thanks in advance!
> 
> - Alex

OK... Well my instance ran out of memeory Java.lang. out of memeory: Java
Heap

Which is set at 1.2g  Which should be more then adaquate.

CHeckout what happened in the logs:

03/24 18:49:22 metrics Web threads (busy/total): 0/5 Sessions: 2640 Total
Memory=1299840 Free=1132810
03/24 18:50:22 metrics Web threads (busy/total): 0/4 Sessions: 2640 Total
Memory=1299840 Free=1128173
03/24 18:51:22 metrics Web threads (busy/total): 25/57 Sessions: 2637 Total
Memory=1299840 Free=1115280
03/24 18:52:22 metrics Web threads (busy/total): 25/57 Sessions: 2626 Total
Memory=1299840 Free=600673
03/24 18:53:22 metrics Web threads (busy/total): 25/57 Sessions: 2615 Total
Memory=1299840 Free=600612
03/24 18:54:22 metrics Web threads (busy/total): 25/57 Sessions: 2602 Total
Memory=1299840 Free=606314
03/24 18:55:22 metrics Web threads (busy/total): 25/57 Sessions: 2598 Total
Memory=1299840 Free=606632
03/24 18:56:22 metrics Web threads (busy/total): 2/57 Sessions: 2610 Total
Memory=1299840 Free=59994

Would Jprofiler help me to see what is going internally the next time this
happens?  Any suggestions would be appreciated.

thanks!

- Alex





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