Now that I think about it, this couldn't be the problem. Wouldn't the CPU
be running at almost 100% if this was an issue? I very rarely see it jump
into the red. I see more CPU activity when I open the web browser on this
server. Does this sound right?
Thank You,
Justin A. Stanczak
Web Manager
Shake Learning Resource Center
Vincennes University
(812)888-5813
|---------+---------------------------->
| | [EMAIL PROTECTED]|
| | u |
| | |
| | 10/31/02 04:07 PM|
| | Please respond to|
| | "Tomcat Users |
| | List" |
| | |
|---------+---------------------------->
>--------------------------------------------------------------------------------------------------------------|
|
|
| To: "Tomcat Users List" <[EMAIL PROTECTED]>
|
| cc:
|
| Subject: RE: How do I increase performance on Tomcat?
|
>--------------------------------------------------------------------------------------------------------------|
I am getting a cycle like pattern. I have 256M allocated for the VM. It
shows the VM using about 115M to run Tomcat. I increased the memory using
-Xmxn and also used -server. I had to increase the memory because Tomcat
was running out and crashing. I didn't know to much memory would cause a
problem. I have a server coming it that has 2gig of ram and would like to
use most of the ram for Tomcat. Is this going to cause a problem? I was
starting to think the network was having a problem, but when I ftp
something to that server during a slow time it only takes at the most 8
seconds. The file that I'm downloading is 50M in size. So the network seems
to be fast enough. I'll look into this -Xincgc setting. I have to be able
to use lots of memory. This server is dedicated for Tomcat. Why not use all
its resources. Thanks so far, anymore suggestions are definitely
appreciated.
Thank You,
Justin A. Stanczak
Web Manager
Shake Learning Resource Center
Vincennes University
(812)888-5813
|---------+---------------------------->
| | "Craig R. |
| | McClanahan" |
| | <craigmcc@apache.|
| | org> |
| | |
| | 10/30/02 01:30 PM|
| | Please respond to|
| | "Tomcat Users |
| | List" |
| | |
|---------+---------------------------->
>
--------------------------------------------------------------------------------------------------------------|
|
|
| To: Tomcat Users List <[EMAIL PROTECTED]>
|
| cc:
|
| Subject: RE: How do I increase performance on Tomcat?
|
>
--------------------------------------------------------------------------------------------------------------|
On Thu, 31 Oct 2002, David Tildesley wrote:
> Date: Thu, 31 Oct 2002 07:19:48 +1300
> From: David Tildesley <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: Tomcat Users List <[EMAIL PROTECTED]>
> Subject: RE: How do I increase performance on Tomcat?
>
> I've observed that increasing memory settings can have the opposite
effect
> on performance also and introduce a cyclic performance factor (requests
per
> second spikes quite high and then plummets to very low for sometimes 30
secs
> or more.
That is exactly what I'd expect to see if you've allocated a lot of memory
and the garbage collector fires off. The only way to know for sure is use
a monitoring tool.
If it is garbage collection, try using incremental mode (set your
CATALINA_OPTS environment variable to include "-Xincgc" before starting
Tomcat).
Craig
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