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Posted to users@tomcat.apache.org by Modha Khammammettu <MK...@calcas.com> on 2008/02/19 18:11:01 UTC
Xmx and Xms where are these values set
Hi
I have a web app which runs on tomcat 5.5
When I run tomcat here is what I see in the output
MyMc 2008-02-15 05:05:02,925 INFO Memory usage: 249.923 MB used, 762.700
MB free, 1012.625 MB total, 1012.625 MB max
Tomcat comes up as a service.
Question: Where are these memory setting coming from, I looked at
catalina.bat, catalina.properties, service parameters there are no xmx
and xms values specified.
I need a way to input Xmx and Xms values.
If I change catalina.bat JAVA_OPTS and add the flags
"-XX:+PrintGCDetails -XX:+PrintHeapAtGC -XX:+PrintGCTimeStamps
I still see the same
MyMc 2008-02-15 05:05:02,925 INFO Memory usage: 249.923 MB used, 762.700
MB free, 1012.625 MB total, 1012.625 MB max
and nothing more.
Question: Why is that I am not seeing heap information output?
Please let me know.
Thanks
RE: Xmx and Xms where are these values set
Posted by Modha Khammammettu <MK...@calcas.com>.
I think the tomcat installation was corrupted.
I tried with a fresh install and I can see the heap and other
information just fine.
Thanks
-----Original Message-----
From: Caldarale, Charles R [mailto:Chuck.Caldarale@unisys.com]
Sent: Tuesday, February 19, 2008 11:11 AM
To: Tomcat Users List
Subject: RE: Xmx and Xms where are these values set
> From: Modha Khammammettu [mailto:MKhammammettu@calcas.com]
> Subject: RE: Xmx and Xms where are these values set
>
> I did that but it has no effect.
Did you actually click thr apply button, and then stop and restart the
Tomcat service? Do you have multiple Tomcats installed? If so, are you
sure you're accessing the right one with tomcat5w.exe? Note that
changing the .bat files has no effect on any Tomcat service.
> Is tomcat using some default setting to come up with this 1012.625GB,
> where is this value comming from?
Tomcat cannot set any heap size parameters, as these are established
only at JVM startup and cannot be changed while the JVM instance is
running.
This short paper describes how the defaults are calculated in the
absence of a -Xmx setting:
http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html
- Chuck
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RE: Xmx and Xms where are these values set
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Modha Khammammettu [mailto:MKhammammettu@calcas.com]
> Subject: RE: Xmx and Xms where are these values set
>
> I did that but it has no effect.
Did you actually click thr apply button, and then stop and restart the
Tomcat service? Do you have multiple Tomcats installed? If so, are you
sure you're accessing the right one with tomcat5w.exe? Note that
changing the .bat files has no effect on any Tomcat service.
> Is tomcat using some default setting to come up with this
> 1012.625GB, where is this value comming from?
Tomcat cannot set any heap size parameters, as these are established
only at JVM startup and cannot be changed while the JVM instance is
running.
This short paper describes how the defaults are calculated in the
absence of a -Xmx setting:
http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
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To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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RE: Xmx and Xms where are these values set
Posted by Modha Khammammettu <MK...@calcas.com>.
I did that but it has no effect.
The problem is what ever I do I still see the same line as output
MyMc 2008-02-15 05:05:02,925 INFO Memory usage: 249.923 MB used, 762.700
MB free, 1012.625 MB total, 1012.625 MB max
Is tomcat using some default setting to come up with this 1012.625GB,
where is this value comming from?
Thanks
-----Original Message-----
From: Caldarale, Charles R [mailto:Chuck.Caldarale@unisys.com]
Sent: Tuesday, February 19, 2008 10:32 AM
To: Tomcat Users List
Subject: RE: Xmx and Xms where are these values set
> From: Modha Khammammettu [mailto:MKhammammettu@calcas.com]
> Subject: Xmx and Xms where are these values set
>
> I have a web app which runs on tomcat 5.5 Tomcat comes up as a
> service.
> Question: Where are these memory setting coming from
Run the tomcat5w.exe program, and look under the Java tab.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
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---------------------------------------------------------------------
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RE: Xmx and Xms where are these values set
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Modha Khammammettu [mailto:MKhammammettu@calcas.com]
> Subject: Xmx and Xms where are these values set
>
> I have a web app which runs on tomcat 5.5
> Tomcat comes up as a service.
> Question: Where are these memory setting coming from
Run the tomcat5w.exe program, and look under the Java tab.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
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To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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