there.
Also, I noticed that the SB internal memory usage is about 2x the
size of the actual contents. Is that because each char is stored as
2 bytes for Unicode? (Not the char array to string conversion, which
is different.)
You'd have to look more closely at the circumstances. I was about to
264MB for the
cb> returned String, about 790MB total for that piece of the pie.
cb> Contents were simply the JSON query results returned to the client.
cb> No mystery there.
Also, I noticed that the SB internal memory usage is about 2x the size of the
actual contents. Is that because each char is s
Cris,
On 6/1/21 09:17, Berneburg, Cris J. - US wrote:
Hi Chris
[lots of snippage]
cb> One of our web apps is using a "lot" of memory, specifically a big
cb> user query. We'd like to find out why.
cb> 1. Is there a way to analyze uncollected garbage?
cb> * AWS EC2 instance.
cb> * There are
Hi Chris
[lots of snippage]
cb> One of our web apps is using a "lot" of memory, specifically a big
cb> user query. We'd like to find out why.
cb> 1. Is there a way to analyze uncollected garbage?
cb> * AWS EC2 instance.
cb> * There are other TC instances on the same server.
cb> * Each TC
Hi Raghunath
cb> One of our web apps is using a "lot" of memory,
cb> specifically a big user query. We'd like to find out why.
cb> 1. Is there a way to analyze uncollected garbage?
rm> You could try using the Oracle utility - "jstat" - for analyzing
rm> the GC in an active Java process (PID)
Hi John :-)
cb> 1. Is there a way to analyze uncollected garbage?
cb> 2. Is that a reasonable way to identify potential memory usage problems?
jeg> MAT has an option to "Keep unreachable options." It's under preferences.
Thanks for the suggestion! I did not know abou
Hi Amit :-)
cb> 1. Is there a way to analyze uncollected garbage?
cb> 2. Is that a reasonable way to identify potential memory usage problems?
ap> Have you enabled the " Enable 'keep unreachable objects'" setting of MAT?
ap> https://blog.gceasy.io/2015/12/11/eclipse-m
ools/unix/jstat.html
-Original Message-
From: Berneburg, Cris J. - US
Sent: Thursday, May 27, 2021 1:24 PM
To: users@tomcat.apache.org
Subject: [OT] web app big memory usage?
Hi Folks :-)
One of our web apps is using a "lot" of memory, specifically a big user query.
We'd like to
ine
wastefulness.
1. Is there a way to analyze uncollected garbage?
2. Is that a reasonable way to identify potential memory usage
problems?
Some technical specifics: * TC 8.5.63 * Java 1.8.0_291 * AWS EC2
instance. * Windows Server 2016. * Instance started as Windows
Service. * There are other TC i
Cris,
> -Original Message-
> From: Berneburg, Cris J. - US
> Sent: Thursday, May 27, 2021 2:24 PM
> To: users@tomcat.apache.org
> Subject: [OT] web app big memory usage?
>
> Hi Folks :-)
>
> One of our web apps is using a "lot" of memory, speci
ERNAL] [OT] web app big memory usage?
Hi Folks :-)
One of our web apps is using a "lot" of memory, specifically a big user query.
We'd like to find out why.
The Tomcat Web Application Manager Find leaks button said that "No web
applications appear to have triggered a me
ollected garbage?
2. Is that a reasonable way to identify potential memory usage problems?
Some technical specifics:
* TC 8.5.63
* Java 1.8.0_291
* AWS EC2 instance.
* Windows Server 2016.
* Instance started as Windows Service.
* There are other TC instances on the same server.
* Each TC instance has mu
On 24/04/2019 21:46, Simon Funnell wrote:
> Hi,
>
> I am looking at running a small ecommerce site with about 40-80 users at a
> time on a virtual private server with 4 cores and 1GB of memory, I am
> planning on running apache james, mysql and tomcat on this instance. My
> question is will 256MB
Hi,
I am looking at running a small ecommerce site with about 40-80 users at a
time on a virtual private server with 4 cores and 1GB of memory, I am
planning on running apache james, mysql and tomcat on this instance. My
question is will 256MB maximum heap memory with say 50 threads be enough to
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Hash: SHA256
Nagendra,
On 4/14/17 4:36 AM, nagendra.r...@wipro.com wrote:
> Problem statement: Memory usage increased form 500MB to 4 GB after
changing the tomcat process from 32 bit to 64 bit execution
Any other changes? For example, changes to the h
On 14.04.2017 10:36, nagendra.r...@wipro.com wrote:
Hi All,
Problem statement: Memory usage increased form 500MB to 4 GB after changing the
tomcat process from 32 bit to 64 bit execution
As tomcat memory has increased it is impacting available memory for other
applications on server
o
Hi All,
Problem statement: Memory usage increased form 500MB to 4 GB after changing the
tomcat process from 32 bit to 64 bit execution
As tomcat memory has increased it is impacting available memory for other
applications on server
o Is this a bug ?
o Earlier with 32bit it was running
Hi all,
I don't know if this is useful but apart from utilities/commands already
mentioned, I use the following to monitor the GC of the particular
generations in JVM:
/usr/jdk/jdk1.5.0_12/bin/jstat -gc $TOMCAT_PID 5000 10
Of course you need to substitute the appropriate JDK installed on your
Pid wrote:
On 26/05/2011 21:50, André Warnier wrote:
André Warnier wrote:
Pid wrote:
On 26/05/2011 20:16, Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com] Subject: Monitoring
memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump
On Fri, 27 May 2011 09:50:06 +0200, André Warnier wrote:
Searching the WWW, I am finding (too) many interpretations of the
output of -verbose:gc (or -verbosegc, none of them starting from
exactly the format above.
I can kind of guess what the above means, but where can I find an
authoritative
like to monitor the memory usage of that JVM, but in a way that in itself does
not impact the performance too much. Basically what we want, is to keep some information
in a logfile, which in case of serious problem with memory would allow us to get a clue as
to what is happening via some post
From: André Warnier [mailto:a...@ice-sa.com]
Subject: Monitoring memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump for example some information each time a GC happens,
Try -verbose:gc and -Xloggc:file_path_of_your_choice
- Chuck
On 26/05/2011 20:16, Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com]
Subject: Monitoring memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump for example some information each time a GC happens,
Try -verbose:gc
Pid wrote:
On 26/05/2011 20:16, Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com]
Subject: Monitoring memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump for example some information each time a GC happens,
Try -verbose:gc
André Warnier wrote:
Pid wrote:
On 26/05/2011 20:16, Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com] Subject: Monitoring
memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump for example some information each time a GC happens
On 26/05/2011 21:50, André Warnier wrote:
André Warnier wrote:
Pid wrote:
On 26/05/2011 20:16, Caldarale, Charles R wrote:
From: André Warnier [mailto:a...@ice-sa.com] Subject: Monitoring
memory usage of JVM
I am thinking of a couple of command-line options for the JVM,
to dump for example
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
Chuck and Chris,
Thanks for yor explanations,
Let me, try to summarize what I understand adding some extra info and ask my
questions.
Is following classifications true for memory usage of Java ? If not please
correct it.
A. Java memory usage when application is started as a windows service
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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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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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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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
no direct way of controlling the size of any of these. If you want
to reduce Java's memory usage, you can reduce its heap space after
monitoring what the process' overheads are.
- Peter
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
Very well,
I just tried to inspire someone on how to 'pump up memory usage'. It wasn't
about the details.
In fact: one line of code doesn't compile without a class and method
declaration. So you could have mailed me a java-for-beginners manual. :-)
Cheers,
Ronald.
Op woensdag, 19 augustus
byte[] b = new byte[100];
Op woensdag, 19 augustus 2009 10:51 schreef Thomas G. Lau
thomas@ntt.com.hk:
Dear Tomcat Users,
how could I pump up memory usage on tomcat? we want to test if tomcat having
any problem when changed environment from 32 bit 2GB limitation to 64bit
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Ronald,
On 8/19/2009 5:32 AM, Ronald Klop wrote:
byte[] b = new byte[100];
Java limits arrays to 2147483648 elements, so the above shouldn't even
compile (and it doesn't for me).
Section 2.15.4 of the JLS says:
A component of an array is
Jacob Rhoden wrote:
I am working on creating some more scalable tomcat applications. I have
addedd a SessionListener and it seems that hitting a jsp page triggers a
session to be created.
If there are 1000 users and only 10 are signed in, I dont think 1000
sessions need to be created yes.
Hi Guys,
I am working on creating some more scalable tomcat applications. I have
addedd a SessionListener and it seems that hitting a jsp page triggers a
session to be created.
If there are 1000 users and only 10 are signed in, I dont think 1000
sessions need to be created yes. How do I turn
Hi
Please need this Information
Memory Usage Differ for same TOMCAT5.5.23 on 32 / 64 bit Java Version ?
with regards
Karthik
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To start a new topic, e-mail: users@tomcat.apache.org
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karthikn wrote:
Hi
Please need this Information
Memory Usage Differ for same TOMCAT5.5.23 on 32 / 64 bit Java Version ?
None.
Mark
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Hi
java on UNIX by default starts in 32 bit mode
to run java in 64 bit mode , java -d64 is specified
so for TOMCAT on catalina.sh
HOW TO for JAVA_HOME in 64 bit ?
with regards
Karthik
Mark Thomas wrote:
karthikn wrote:
Hi
Please need this Information
Memory Usage Differ
,
there must be some huge objects created from time to time. You need to use
tool like figure it out.
Billy Ng
- Original Message -
From: Tuan Quan [EMAIL PROTECTED]
To: users@tomcat.apache.org
Sent: Monday, June 16, 2008 9:11 AM
Subject: Memory usage in Tomcat 6
Hi all, how do I
From: Billy Ng [mailto:[EMAIL PROTECTED]
Subject: Re: Memory usage in Tomcat 6
Changing the -Xmsnm and -Xmxnm in the tomcatw.exe
That's tomcat6w.exe, not tomcatw.exe.
If you still have problem, there must be some huge
objects created from time to time.
It can also be PermGen space
Hi all, how do I adjust Memory allocation Tomcat 6, running as service in
Windows? I ran into out of memory error.
thanks.
From: Tuan Quan [mailto:[EMAIL PROTECTED]
Subject: Memory usage in Tomcat 6
Hi all, how do I adjust Memory allocation Tomcat 6, running
as service in Windows?
Use the tomcat6w.exe program in Tomcat's bin directory.
Read the FAQ for memory usage information:
http://wiki.apache.org/tomcat/FAQ
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tootbatoot,
tootbatoot wrote:
| Hi Thanks. the two applications run on their own and don't share jvm
so I can
| use different versions - but the webapp I have deployed in tomcat server
| requires it to be either on 5.0.28 or 5.5.17 (but using
://www.nabble.com/Tomcat-5.0.28-memory-usage---garbage-collection-tp17800619p17826655.html
Sent from the Tomcat - User mailing list archive at Nabble.com.
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process release memory when there is no load ?
thanks
--
View this message in context:
http://www.nabble.com/Tomcat-5.0.28-memory-usage---garbage-collection-tp17800619p17800619.html
Sent from the Tomcat - User mailing list archive at Nabble.com
From: tootbatoot [mailto:[EMAIL PROTECTED]
Subject: Tomcat 5.0.28 memory usage - garbage collection
When I put load on it via my webapp - I can see the memory
allocated to the process going up (in task manager) but
when I kill the session of the webapp (i.e. remove the load)
it does
:[EMAIL PROTECTED]
Subject: Tomcat 5.0.28 memory usage - garbage collection
When I put load on it via my webapp - I can see the memory
allocated to the process going up (in task manager) but
when I kill the session of the webapp (i.e. remove the load)
it does not come down. Should
From: tootbatoot [mailto:[EMAIL PROTECTED]
Subject: RE: Tomcat 5.0.28 memory usage - garbage collection
jdk1.4.2_12
I'd strongly recommend upgrading to a newer JVM. 1.6 especially is noticeably
faster than 1.4 and includes better heap management. You should upgrade Tomcat
as well
From: Caldarale, Charles R [mailto:[EMAIL PROTECTED]
Subject: RE: Tomcat 5.0.28 memory usage - garbage collection
I'd strongly recommend upgrading to a newer JVM. 1.6
especially is noticeably faster than 1.4 and includes better
heap management. You should upgrade Tomcat as well
thanks.
The reason we have to stick to using this version is that it is recommended
by another application that tomcat is acting as a client to.
From your posts - I understand that the memory usage might show going up all
the time - and it will still be ok because it is showing the heap size
? If they are not running in the same JVM, there
should be no reason that different JVM versions cannot be used. The
3rd-party can use whatever they want (1.4?) while you run a newer version.
| From your posts - I understand that the memory usage might show going
up all
| the time
Hi,
I would like to know if there is some way which I can monitoring of the
memory usage through of Tomcat. I mean, I have currently running a
Tomcat 6 server, and through that I want to know not only the memory
usage of JVM also the memory usage of the system.
Thanks in advance
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André,
André Warnier wrote:
| Is there some kind of general source of information, or registry or
| repository, where one could find [...] a list of already-developed
add-on modules for Tomcat?
Not really. Most of the Tomcat-specific stuff actually
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Liang,
Liang Xiao Zhu wrote:
| I would like to know if there is some way which I can monitoring of the
| memory usage through of Tomcat. I mean, I have currently running a
| Tomcat 6 server, and through that I want to know not only the memory
Can anyone help me?
Liang Xiao Zhu escribió:
Hi,
I would like to know if there is some way which I can monitoring of
the memory usage through of Tomcat. I mean, I have currently running a
Tomcat 6 server, and through that I want to know not only the memory
usage of JVM also the memory usage
Thanks for your answer!!!
Christopher Schultz escribió:
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Liang,
Liang Xiao Zhu wrote:
| I would like to know if there is some way which I can monitoring of the
| memory usage through of Tomcat. I mean, I have currently running a
| Tomcat 6 server
Christopher Schultz wrote:
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Liang,
Liang Xiao Zhu wrote:
| I would like to know if there is some way which I can monitoring of the
| memory usage through of Tomcat. I mean, I have currently running a
| Tomcat 6 server, and through that I want
the Tomcat Docs/ FAQ, and Googling I think that I am setting
what I need to set(Catalina.bat), but it seems to have no effect.
What resource am I not taking advantage of with this information, or what am
I missing to set the max memory usage in the JVM when Tomcat starts up?
Thank you for your
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
Hello,
How Can I adjust the maximum memory usage for Tomcat process?
Greetings
Alexander Diedler
From: Alexander Diedler [mailto:[EMAIL PROTECTED]
Subject: Adjust max memory usage in Tomcat
How Can I adjust the maximum memory usage for Tomcat process?
1) Learn how to use Java.
2) Read the Tomcat FAQ.
http://wiki.apache.org/tomcat/FAQ/Memory
3) Search the archives.
http://marc.info/?l
Hi,
Can I see the memory usage of the web application deployed in Tomcat with JMX.
By now I can connect to Tomcat with jconsole and see the summary memory size.
I hope that I can also see the size of the web application without
writing Java code.
I think so because web application classes
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Subject: memory usage of specific webapp with jmx
I hope that I can also see the size of the web application
without writing Java code.
Nope, and probably not even by writing Java code.
I think so because web application classes
the virtual memory usage from 367 to
679 m and stays there!
Undeploying a stopped application doesn't change the numbers.
Why does stopping (or undeploying) a webapplication cause a dramatic
increase in memory usage?
My guesses:
- Some ressources are not freed? (database connections)
- Some hibernate
)
So stopping the application increases the virtual memory usage from 367 to
679 m and stays there!
The increase is probably due to specific code your application executes
when it is stopped. It seems to do memory intesive things there :) You
have to be aware a JVM memory never decrease in terms
From: Jordi Prats [mailto:[EMAIL PROTECTED]
Subject: memory usage
There's any way to identify witch application and witch class
is getting to many memory?
Read the FAQ:
http://wiki.apache.org/tomcat/FAQ/Memory
How can I get some statistics about tomcat's memory usage?
The same way you
application and witch class is getting
to many memory? I think that some application creates a immense array by
never delete any data.
How can I get some statistics about tomcat's memory usage?
Many thanks!
Jordi
-
To start a new
From: David Delbecq [mailto:[EMAIL PROTECTED]
Subject: Re: memory usage increases on application stop
Note that the PermSize is taken from the heap,
so it should be lower than max heap size.
Not true in a HotSpot JVM; the heap and PermGen settings are
independent. The virtual space
From: Christoph Sperle [mailto:[EMAIL PROTECTED]
Subject: Memory usage problem
As you can see, tomcat uses 138m, even though, it was start
up with 64m restriction (-Xmx64m).
You're confusing heap size (-Xmx) with total process space. The total
process space includes many other things
Hello all
I run tomcat on a virtual private server with very limited resources.
Therefore I want tomcat to run with very restrictive memory usage. I
tried hard to get this done, but with no success. Tomcat uses as much
memory as it wants to use, regardless of the specified startup settings.
OS
the overall process memory tomcat
uses.
Thanks
Christoph
-Original Message-
From: Caldarale, Charles R [mailto:[EMAIL PROTECTED]
Sent: Mittwoch, 19. Dezember 2007 15:42
To: Tomcat Users List
Subject: RE: Memory usage problem
From: Christoph Sperle [mailto:[EMAIL PROTECTED]
Subject: Memory
From: Christoph Sperle [mailto:[EMAIL PROTECTED]
Subject: RE: Memory usage problem
Do you have a hint to restrict/reduce the overall process
memory tomcat uses.
1) Eliminate unnecessary items in server.xml (e.g., unused connectors).
2) Reduce the number of threads configured for each
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
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not free
though as far as I know.
It might help
On 10/10/07, Andrew Hole [EMAIL PROTECTED] 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 know exactly
why this happens. Some suggestion?
Thanks a lot
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
Thank you Chuck and Chris for your help and advice. I will definitely be
reading your refs Chris
Regards
Peter
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For
From: Peter Sparkes [mailto:[EMAIL PROTECTED]
Subject: Memory usage with multiple instances of tomcat
1. Does each tomcat instance use a separate 2 GB of memory, ie the 3
instance use 6 GB between them ?
2. or do they potentially share they same memory?
Don't confuse virtual memory with RAM
From: Peter Sparkes [mailto:[EMAIL PROTECTED]
Subject: Re: Memory usage with multiple instances of tomcat
The commands -Xms3g -Xmx3g will set the min/max heap to
3 GB, please how do I set the RAM for each instance of
Tomcat5.5 to 2 GB
You can't set the amount of RAM for any process
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Peter,
1. Does each tomcat instance use a separate 2 GB of memory, ie the 3
instance use 6 GB between them ?
Each instance gets a separate, 2GB heap space.
2. or do they potentially share they same memory?
Since Java 1.5, shared archive
Hi,
I followed the Tomcat with 8 GB memory thread but did not find the
answer to the following question:
I am setting up a Linux server with 8 GB memory which will be running 3
instances of tomcat 5,5; when I allocate memory to java, say 2GB:
1. Does each tomcat instance use a separate 2
You'll need to allocate 2GB to each Tomcat instance. As long as you
use the standard Tomcat startup scripts each Tomcat instance will run
in a separate JVM (you'd have to be pretty deliberate about making it
run any other way).
Regards,
Adrian Sutton
http://www.symphonious.net
On
Thanks Adrian
Regards
Peter
You'll need to allocate 2GB to each Tomcat instance. As long as you
use the standard Tomcat startup scripts each Tomcat instance will run
in a separate JVM (you'd have to be pretty deliberate about making it
run any other way).
Regards,
Adrian Sutton
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