FYI - look out for this WRT MaxNewSize and NewRatio:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6862534
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you see anything dangerous/wrong/not good?
Thanks,
Carl
- Original Message -
From: Dan Armbrust daniel.armbrust.l...@gmail.com
To: Tomcat Users List users@tomcat.apache.org; p...@pidster.com
Sent: Tuesday, February 02, 2010 2:07 PM
Subject: Re: tomcat memory usage
FYI - look out
Nope, but I'm not an expert with these (at all).
I use something pretty similar, the only real difference is that I
haven't turned on the CMSIncrementalMode. My apps haven't shown an
issue with long pause times, so I haven't researched/tested it yet.
Dan
On Tue, Feb 2, 2010 at 1:55 PM, Carl
: tomcat memory usage
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
What else goes into PermGen, other than java.lang.Class objects?
It varies by JVM level. In the original HotSpot implementation it was pretty
much just the instances
From: Hüsnü Þentürk [mailto:husnusent...@yahoo.com]
Subject: Re: tomcat memory usage
Is following classifications true for memory usage of Java ?
Pretty much, but you're missing ancillary bits such as libraries, OS-created
structures, statically linked code, dynamically generated code
From: Pid [mailto:p...@pidster.com]
Subject: Re: tomcat memory usage
The overall size of the heap is controlled by 3 different groups of
settings, not just the one you referred to:
-Xms512M -Xmx512M
-XX:NewSize=32m -XX:MaxNewSize=4096m
-XX:PermSize=64m -XX:MaxPermSize
On 29/01/2010 15:13, Caldarale, Charles R wrote:
From: Pid [mailto:p...@pidster.com]
Subject: Re: tomcat memory usage
The overall size of the heap is controlled by 3 different groups of
settings, not just the one you referred to:
-Xms512M -Xmx512M
-XX:NewSize=32m
From: Pid [mailto:p...@pidster.com]
Subject: Re: tomcat memory usage
So the MaxNewSize, despite often being seen at high values in
jmap outputs, is actually only applicable if the 'mx' allows it?
Correct. Do you have an example of an erroneous MaxNewSize display? I seem to
recall some
On 29/01/2010 15:27, Caldarale, Charles R wrote:
From: Pid [mailto:p...@pidster.com]
Subject: Re: tomcat memory usage
So the MaxNewSize, despite often being seen at high values in
jmap outputs, is actually only applicable if the 'mx' allows it?
Correct. Do you have an example of an erroneous
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
All Java objects and their associated data are stored
within the heap.
Well... no. The OP's original question was about what was outside the -Xmx
heap setting, and Class objects
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Hash: SHA1
Chuck,
On 1/27/2010 11:28 AM, Caldarale, Charles R wrote:
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
All Java objects and their associated data are stored
within the heap.
Well
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
So, static members are stored outside the heap? Where are they stored?
PermGen?
They're definitely not in the main Java heap; I'm pretty sure they're in
PermGen, although it's been awhile since
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Hash: SHA1
Chuck,
On 1/27/2010 1:50 PM, Caldarale, Charles R wrote:
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
So, static members are stored outside the heap? Where are they
stored? PermGen
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
The compiler knows that the staticObject member is static, and might
even be able to tell the runtime that the object to be used for that
static member should go into PermGen.
You're confusing
Hi
So, static members are stored outside the heap? Where are they stored?
PermGen?
For sure, no.
ALL persistent java objects are on the heap. With optimization some very short
living objects may reside on the stack only.
References to static objects ARE probably stored in PermGen, but the
From: Steffen Heil [mailto:li...@steffen-heil.de]
Subject: AW: tomcat memory usage
I am not sure, where the Class objects themselfes reside.
They are in PermGen along with a very few other internally-generated structures.
Whereever they are, static references are in there.
Actually
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Hash: SHA1
Chuck,
On 1/27/2010 2:50 PM, Caldarale, Charles R wrote:
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
The compiler knows that the staticObject member is static, and might
even be able to tell
From: Christopher Schultz [mailto:ch...@christopherschultz.net]
Subject: Re: tomcat memory usage
What else goes into PermGen, other than java.lang.Class objects?
It varies by JVM level. In the original HotSpot implementation it was pretty
much just the instances of java.lang.Class
Hi,
In our company, we are using apache tomcat as a windows service. We defined jvm
parameters --JvmMs 512 --JvmMx 512 in service.bat. But application is using
600,980 KB memory. I expect the application not to use more then 512 MB.
Can you explain me, the reason of this stuation.
On 26/01/2010 15:12, Hüsnü Þentürk wrote:
Hi,
In our company, we are using apache tomcat as a windows service. We defined jvm
parameters --JvmMs 512 --JvmMx 512 in service.bat. But application is using
600,980 KB memory. I expect the application not to use more then 512 MB.
Can you explain
2010/1/26 Hüsnü Þentürk husnusent...@yahoo.com
Hi,
In our company, we are using apache tomcat as a windows service. We defined
jvm parameters --JvmMs 512 --JvmMx 512 in service.bat. But application is
using 600,980 KB memory. I expect the application not to use more then 512
MB.
Can you
of 512MB reserved
heap area used only by Java itself?
From: Peter Crowther peter.crowt...@melandra.com
To: Tomcat Users List users@tomcat.apache.org
Sent: Tue, January 26, 2010 5:43:22 PM
Subject: Re: tomcat memory usage
2010/1/26 Hüsnü Þentürk husnusent
Hello all,
I read the documentation on the Tomcat6 site and I have attempted to modify
the max jvm memory settings when tomcat starts up by modifying Catalina.bat,
but it *appears* to have no effect.
Here is a summary of the situation and what I have done.
I am using Tomcat6 stable
From: Chris Richmond [mailto:[EMAIL PROTECTED]
Subject: Setting Tomcat memory usage
set JAVA_OPTS = -Xms512m -Xmx512m
Take out the spaces around the equals sign. Windows interprets the
above as a setting for JAVA_OPTS (note the trailing space) rather
than JAVA_OPTS, so it will be ignored
I've an java application running under tomcat and in the last week
memory usage increase 50%, from 200M to 400M. I want to know exactly
why this happens. Some suggestion?
Thanks a lot
-
To start a new topic, e-mail:
Try Lambda Probe as recommended by other contributors to this list.
http://www.lambdaprobe.org/d/index.htm
I'm no expert with this tool but it's straightforward to install and I
think it may help you out a bit. The System Information/Memory
Utilization thing is particularly fascinating although
plug in a profiler,
I use www.yourkit.com, you can get memory stats, like the ones you wish
for, live.
other profilers will do the job as well
Filip
Andrew Hole wrote:
I've an java application running under tomcat and in the last week
memory usage increase 50%, from 200M to 400M. I want to
Hi all,
I run a cocoon webapp which is hosted on a shared
Linux environnement and runs under tomcat 5.5.9.
There are about 7 applications running under that
tomcat instance (2 cocoon, at least 1 jsp, don't know
for the others).
My host provider complains that he tomcat uses a lot
of memory and
java6 I can recommend it, faster and better :-)
/Regards Per Jonsson
-Original Message-
From: Jerome Benezech [mailto:[EMAIL PROTECTED]
Sent: den 14 maj 2007 11:21
To: users@tomcat.apache.org
Subject: Tomcat Memory Usage
Hi all,
I run a cocoon webapp which is hosted on a shared Linux
Message-
From: Jerome Benezech [mailto:[EMAIL PROTECTED]
Sent: den 14 maj 2007 11:21
To: users@tomcat.apache.org
Subject: Tomcat Memory Usage
Hi all,
I run a cocoon webapp which is hosted on a shared
Linux environnement
and runs under tomcat 5.5.9.
There are about 7 applications
Per Jonsson
-Original Message-
From: Jerome Benezech [mailto:[EMAIL PROTECTED]
Sent: den 14 maj 2007 12:33
To: Tomcat Users List
Subject: RE: Tomcat Memory Usage
Hi,
We're on Java 1.5 and do not get any OutOfMemory but after some point,
Tomcat uses 50% of the server memory and stops
Subject: RE: Tomcat Memory Usage
Hi,
We're on Java 1.5 and do not get any OutOfMemory but
after some point,
Tomcat uses 50% of the server memory and stops
serving requests.
--- Per Johnsson [EMAIL PROTECTED] wrote:
Hi!
If you get OutOfMemory Errors and running java 1.6
(maybe later
Hi Christopher,
any links to the following implementation of multiple instances available?
Regards,
Ayusman
On 1/17/07, Christopher Schultz [EMAIL PROTECTED] wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Ayusman,
Ayusman Dikshit wrote:
I wanted to know how can I specify/increase the
Ayusman Dikshit wrote:
any links to the following implementation of multiple instances
available?
Unzip/untar, change listening port and you're ready.
--
Mikolaj Rydzewski [EMAIL PROTECTED]
smime.p7s
Description: S/MIME Cryptographic Signature
Ayusman,
I have a OS X server, running Tomcat 5.0.19. There are already
three applications running but I will need one more application
which is memory intensive. I wanted to know how can I specify/
increase the memroy requirements for my application or Tomcat
application? My new
the 1GB limit is OS specific, on Solaris for example, and a 32bit VM we
had the limit of -Xmx1850m
on a 64bit VM the limitation should be non existent
Filip
Stephen Caine wrote:
Ayusman,
I have a OS X server, running Tomcat 5.0.19. There are already three
applications running but I will
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Ayusman,
Ayusman Dikshit wrote:
Hi Christopher,
any links to the following implementation of multiple instances available?
Read the file RUNNING.txt in your Tomcat distribution, particularly the
section titled Advanced Configuration - Multiple
Hi All,
I have a OS X server, running Tomcat 5.0.19.
There are already three applications running but I will need one more
application which is memory intensive.
I wanted to know how can I specify/increase the memroy requirements for my
application or Tomcat application?
My new application may
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Ayusman,
Ayusman Dikshit wrote:
I wanted to know how can I specify/increase the memroy requirements for my
application or Tomcat application?
If you want to give this particular application more resources than you
want to share with the others,
Rainer Jung,
thanks for ur reply. I understand that JVM will use lots of memory besides
heap.
but I didn't see that the gap between the heap size and total memory size
can be stable.
it keeps on growing.
I list the pmap result below. there are lots of unknow memory allocated. Is
there any
Usually the term heap is used for the sum of the new space, one of the
two semi spaces (both usually around a couple of MB) and tenured. The
size of each of these can be viewed e.g. with jconsole, which comes with
your JVM.
Additional memory is used for perm (class data), which should generally
Env: Axis1.4/Tomcat 5.0.30/Java 1.5.0_07/Solaris 10.
Description :
right after system(tomcat) is started, the top command show that tomcat
process will use 210M memory, the heap size (using Jprofiler) is
58m/20m(total/used). there is a 150M gap between total process memory
size and java heap
Hi
Description :
right after system(tomcat) is started, the top command show
that tomcat process will use 210M memory, the heap size
(using Jprofiler) is 58m/20m(total/used). there is a 150M gap
between total process memory size and java heap size.
There needs to be some memory for the
Hi,
We recently developed and deployed a web based application using the
following technologies...
Struts
Spring
Hibernate 3.0
Mysql 5.0
tomcat 5.5
Linux Fedora Core 4
After the system went live, I have been monitoring the CPU and memory
usages. I dread the outOfMemory errors and am a little
.
-Original Message-
From: Rizwan Merchant [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 03, 2006 7:41 AM
To: tomcat
Subject: tomcat memory usage questions
Hi,
We recently developed and deployed a web based application using the
following technologies...
Struts
Spring
Hibernate 3.0
Mysql
Robert Harper wrote:
Another thing to think about is if you are doing a
lot of string concatenation the StringBuffer object is much better to use
than the String object. StringBuffer will be easier on memory and more
efficient.
Unless you concatenate strings in multiple threads it's better to
From: Robert Harper [mailto:[EMAIL PROTECTED]
Subject: RE: tomcat memory usage questions
Care in development should be taken with respect to use of objects and
having circular references. You can cause memory leaks with circular
references because you might leave free and object from
]
Sent: Tuesday, October 03, 2006 7:41 AM
To: tomcat
Subject: tomcat memory usage questions
Hi,
We recently developed and deployed a web based application using the
following technologies...
Struts
Spring
Hibernate 3.0
Mysql 5.0
tomcat 5.5
Linux Fedora Core 4
After the system went live, I have
Hello all,
We run tomcat inside an embedded system and we are planning to upgrade the
tomcat version from 3.3.1 to 5.5.16. We noticed that the memory footprint of
a barebones tomcat 5.5 installation is 44 MB. Plain and simple Tomcat 3.3
used to run with 25 MB. We have limited memory on our
1) Reduce the number of applications you load during start-up.
2) Remove unwanted jars from WEB-INF/lib and also from
tomcat-home/common/lib
3) Also remove wherever the jars seem to be unnecessary.
--
View this message in context:
http://www.nabble.com/Tomcat-memory-usage-3.3-vs-5.5-t1472557
://www.nabble.com/Tomcat-memory-usage-3.3-vs-5.5-t1472557.html#a3982404
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