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From jm...@adobe.com
Subject Re: RE: is this normal??
Date Thu, 02 Jan 2003 18:21:37 GMT
I have to concur with the following observation.

Try to check what the apache processes are doing. If you've enabled 
server-status on your box and have installed GET (as part of the perl 
LWP) grep for the pid

GET /server-status | grep <pid-of-proc>

or access it http://<server-name>/server-status

On older tomcat versions (i.e. 3.2.1), it would seem that older 
clients (i.e. HTTP/1.0) would hang up on the POST part

ie.

POST /path/to/form/process.jsp HTTP/1.0

Typically my only recourse is to kill the offending process and/or 
restart tomcat and apache.

kill -9 <pid-of-proc>

Hope that helps

-Jan-Michael


----- Original Message -----
From: Ben Ricker <bricker@wellinx.com>
Date: Thursday, January 2, 2003 9:56 am
Subject: RE: is this normal??

> There is probably a problem going on there. I find it strange that 
you
> have so much cumulative CPU time on the httpd processes. To me, they
> look hung (in so far as I can tell). Since most apps are 
transactional
> in nature (i.e., individual requests being fulfilled rather quickly),
> you would expect to see the Apache processes using CPU, then 
> giving it
> up rather quickly. Of course, other httpd processes will also pop 
> in and
> out of CPU usage as individual requests pop in.
> 
> How long has this Apache/Tomcat been running? You might try a 
> restart of
> both and see if the same behavior comes right back or if it takes 
> time.You may have an issue in the app which is triggering a hang.
> 
> Of course, on a "pretty busy web server", you may get such cumulative
> times, but you should still see httpd processes popping in and out of
> CPU usage as they handle their respective requests. If the same 
> PIDs sit
> there pegging the CPU incessently, you most likely have an issue.
> 
> HTH,
> 
> Ben Ricker
> 
> 
> On Thu, 2003-01-02 at 11:37, Randy Paries wrote:
> > I have a pretty busy web server
> > It has apache and tomcat
> > What I am trying to find out if I have a problem or not
> > I am linux guy but not at the tuning level
> > When I do a top I get: These top 4 are always at the top
> > 29616 apache    25   0 87368  78M 14256 R    46.8  7.8 388:13 java
> >  2290 apache    25   0 87368  78M 14256 R    45.0  7.8 386:14 java
> >   460 apache    24   0  6612 5112  4696 R    44.2  0.4 357:51 httpd
> >  2180 apache    25   0  6656 5176  4696 R    39.9  0.5 359:28 httpd
> > 
> > What makes me suspicious is that it is only after some time.
> > 
> > When I do a sar, I have no idle time on the CPU
> > 
> > I realize that this may be a linux or apache question, but I 
> think it
> > has to do with tomcat as well
> > 
> > Thanks for any help
> > 
> > Randy
> > 
> > 
> > --
> > To unsubscribe, e-mail:   <mailto:tomcat-user-
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> -- 
> Ben Ricker <bricker@wellinx.com>
> Wellinx.com
> 
> 
> --
> To unsubscribe, e-mail:   <mailto:tomcat-user-
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> 
> 


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