> From: joon yoo [mailto:[EMAIL PROTECTED]
> Subject: Re: Max Memory Reading
>
> is it a windows limitation or an intel x86 limitation?
Windows, due to limiting an individual process' virtual space to 2 GB.
(Some versions of Windows Server allow configuration of a 3 GB proces
Subject: Re: Max Memory Reading
>
> Nope - the 32Bit JVM can only deal with about 1.5GB Ram
That's a Windows, not JVM, limitation. The virtual memory setup is
different on Solaris, so higher values are possible.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE P
PROTECTED]
> > Subject: RE: Max Memory Reading
> >
> > It seems to be contradicted by this document
> > http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html and by
> > my experience of seeing a near 1GB heap with no -Xmx option set
> > anywhere.
>
-0500, Caldarale, Charles R wrote:
> > From: Alan Flisch [mailto:[EMAIL PROTECTED]
> > Subject: RE: Max Memory Reading
> >
> > It seems to be contradicted by this document
> > http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html and by
> > my experience of s
> From: Alan Flisch [mailto:[EMAIL PROTECTED]
> Subject: RE: Max Memory Reading
>
> It seems to be contradicted by this document
> http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html and by
> my experience of seeing a near 1GB heap with no -Xmx option set
>
wrote:
> > From: Leon Rosenberg [mailto:[EMAIL PROTECTED]
> > Subject: Re: Max Memory Reading
> >
> > unfortunately google is not your friend in this case and the document
> > seems outdated :-)
> >
> > http://java.sun.com/docs/hotspot/gc5.0/ergo5.html
>
&
> From: Leon Rosenberg [mailto:[EMAIL PROTECTED]
> Subject: Re: Max Memory Reading
>
> unfortunately google is not your friend in this case and the document
> seems outdated :-)
>
> http://java.sun.com/docs/hotspot/gc5.0/ergo5.html
Why do you think it's outdated? Wh
> From: Leon Rosenberg [mailto:[EMAIL PROTECTED]
> Subject: Re: Max Memory Reading
>
> On the other side, if you are on 64bit OS (and you probably are, or
> how could you adress 16GB otherwise), why not using 64bit jdk?
Did Solaris 5.9 have a 64-bit version? It's a bit o
> From: Alan Flisch [mailto:[EMAIL PROTECTED]
> Subject: Re: Max Memory Reading
>
> I thought you were safe up to 4000m (in practice a little
> lower) for the 32 bit VM.
Depends on the OS. For Windows, the limit is around 1.5 - 1.6 GB, since
the JVM code, heap, several ancil
> From: Andrew Miehs [mailto:[EMAIL PROTECTED]
> Subject: Re: Max Memory Reading
>
> Nope - the 32Bit JVM can only deal with about 1.5GB Ram
That's a Windows, not JVM, limitation. The virtual memory setup is
different on Solaris, so higher values are possible.
- Chuck
T
It could actually be a 64 bit JVM (I didn't install it) although I
suspect not, but as I have no need to push the memory up any further
just now, I'll leave addressing that till later.
I'll maybe just make it 1600m or something for now as that should be
more than adequate. The server isn't hamme
Christopher,
unfortunately google is not your friend in this case and the document
seems outdated :-)
http://java.sun.com/docs/hotspot/gc5.0/ergo5.html
n the J2SE platform version 5.0 a class of machine referred to as a
server-class machine has been defined as a machine with
2 or more phys
Hmm,
I'm not familiar with limitations on solaris. On linux 32bit VM can
allocate 1.6-1.8 GB depending on vendor (1.6 for sun-jdk).
On the other side, if you are on 64bit OS (and you probably are, or
how could you adress 16GB otherwise), why not using 64bit jdk?
regards
Leon
On 10/13/06, Alan F
Leon,
> The default memory values depends on your machine (processor speed and
> count, total amount of memory) and are guessed by the vm (if not
> explicitely specified) upon application start.
> Times of 64Mb max memory are long over now.
Really? Seems like 32-bit Sun JVM on Sparc has exactly 6
Nope - the 32Bit JVM can only deal with about 1.5GB Ram
Andrew
On 13/10/2006, at 2:51 PM, Alan Flisch wrote:
I thought you were safe up to 4000m (in practice a little lower)
for the
32 bit VM.
Regards,
Alan
-
To start
I thought you were safe up to 4000m (in practice a little lower) for the
32 bit VM.
Regards,
Alan
On Fri, 2006-10-13 at 13:04 +0200, Leon Rosenberg wrote:
> just as note Xmx2000m works on 64bit vm only
> and you can use g instead of 1000m -> -Xmx2g
>
> regards
> Leon
>
> P.S. You should set y
just as note Xmx2000m works on 64bit vm only
and you can use g instead of 1000m -> -Xmx2g
regards
Leon
P.S. You should set your ms=mx, saves time :-)
On 10/13/06, Alan Flisch <[EMAIL PROTECTED]> wrote:
Thanks. Found a reference too:
http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.
Thanks. Found a reference too:
http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html
Going to set the following...
-server
-Xmx2000m
-XX:MaxPermSize=256m
On Fri, 2006-10-13 at 12:38 +0200, Leon Rosenberg wrote:
> def perm size is 64Mb
>
> On 10/13/06, Alan Flisch <[EMAIL PROTECTE
def perm size is 64Mb
On 10/13/06, Alan Flisch <[EMAIL PROTECTED]> wrote:
Thanks, I suspected that, but couldn't find a reference in any JVM docs.
Do you have a reference I could look at so I could better understand
what is going on?
In order for me to set an appropriate larger perm gen size,
Thanks, I suspected that, but couldn't find a reference in any JVM docs.
Do you have a reference I could look at so I could better understand
what is going on?
In order for me to set an appropriate larger perm gen size, I suppose
I'd need to know what it currently is. I seem to remember it is
in
The default memory values depends on your machine (processor speed and
count, total amount of memory) and are guessed by the vm (if not
explicitely specified) upon application start.
Times of 64Mb max memory are long over now.
regards
Leon
On 10/13/06, Alan Flisch <[EMAIL PROTECTED]> wrote:
Hi
Good idea, but nothing set there either. The fact it's such an odd
number is another perplexing issue.
On Fri, 2006-10-13 at 09:36 +0200, Pascal Alberty wrote:
> /etc/init.d/tomcat5 ?
> Check for -Xms and -Xmm options
>
> On 10/13/06, Alan Flisch <[EMAIL PROTECTED]> wrote:
> >
> > Already chec
/etc/init.d/tomcat5 ?
Check for -Xms and -Xmm options
On 10/13/06, Alan Flisch <[EMAIL PROTECTED]> wrote:
Already checked that, it's not in the environment and not set in either
startup.sh or catalina.sh.
On Fri, 2006-10-13 at 14:17 +0700, Lintang JP wrote:
> maybe the value for environment v
Already checked that, it's not in the environment and not set in either
startup.sh or catalina.sh.
On Fri, 2006-10-13 at 14:17 +0700, Lintang JP wrote:
> maybe the value for environment variables called JAVA_OPTS equals those
> values ?
> try to echo $JAVA_OPTS and see if theres any value.
>
>
maybe the value for environment variables called JAVA_OPTS equals those
values ?
try to echo $JAVA_OPTS and see if theres any value.
On 10/13/06, Alan Flisch <[EMAIL PROTECTED]> wrote:
Hi,
I was having some problems with perm gen space on one of our tomcat
instances and decided to increase t
--
From: Asensio, Rodrigo [mailto:[EMAIL PROTECTED]
Sent: Wednesday, September 06, 2006 10:26 AM
To: Tomcat Users List
Subject: RE: max memory..
No, right now I have set the memory to 1024 mb. getTotalMemory is
returning that same value
-Original Message-
From: Leon Rosenberg [mailto:[EMAIL
ECTED]
Sent: Wednesday, September 06, 2006 10:26 AM
To: Tomcat Users List
Subject: RE: max memory..
No, right now I have set the memory to 1024 mb. getTotalMemory is
returning that same value
-Original Message-
From: Leon Rosenberg [mailto:[EMAIL PROTECTED]
Sent: Wednesday, September 06, 2006
No, right now I have set the memory to 1024 mb. getTotalMemory is
returning that same value
-Original Message-
From: Leon Rosenberg [mailto:[EMAIL PROTECTED]
Sent: Wednesday, September 06, 2006 9:27 AM
To: Tomcat Users List
Subject: Re: max memory..
Runtime.getTotalMemory actually
, September 06, 2006 9:06 AM
To: Tomcat Users List
Subject: Re: max memory..
On a 32bit OS you will have no chance to get more than 1.2Gb.
At least its what we have tested.
leon
On 9/6/06, Asensio, Rodrigo <[EMAIL PROTECTED]> wrote:
> Im here again.
> It's a 32 bits OS
>
>
I don't agree
Our tomcat was working with 1440 mb as initial and max memory without
problem.
-Original Message-
From: Leon Rosenberg [mailto:[EMAIL PROTECTED]
Sent: Wednesday, September 06, 2006 9:06 AM
To: Tomcat Users List
Subject: Re: max memory..
On a 32bit OS you will ha
njan bacchu [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 05, 2006 6:20 PM
To: Tomcat Users List
Subject: Re: max memory..
can I move to 2048mb without any problem ? SURE, YES
4 GB RAM -- did you tune the BOOT.INI setting to use the /3GB setting so
that the user process address space goes to
Im here again.
It's a 32 bits OS
Definely GC gonna take longer if has more to collect.
-Original Message-
From: anjan bacchu [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 05, 2006 6:20 PM
To: Tomcat Users List
Subject: Re: max memory..
can I move to 2048mb without any pr
can I move to 2048mb without any problem ? SURE, YES
4 GB RAM -- did you tune the BOOT.INI setting to use the /3GB setting so
that the
user process address space goes to 3 GB(from 2 GB default) ?
related things for performance :
are you using the APR extension ?
how about tweaking the server.xm
Boris, search the archives, Chrales once gava a detailed answer on this topic.
Short version:
until you have > 8 processors you shouldn't worry about the garbage collector.
If you have >8 you should set the number of garbage collection threads
accordingly.
leon
On 9/5/06, Boris Unckel <[EMAIL PR
I discovered no difference in performance between running 1 tomcat, or 4
tomcats on the one machine - same performance.
The machine was a 4x Opteron 870 with 8GB RAM, running Java 1.5.6 32bit.
Andrew
Boris Unckel wrote:
Hello,
>> can I move to 2048mb without any problem ?
Leon Rosenberg wro
Hello,
>> can I move to 2048mb without any problem ?
Leon Rosenberg wrote:
are you using a 64bit version? If yes than the answer is yes.
Otherwise its probably no :-)
Is this really just a 32 vs 64bit decision? What about garbage
collection cycles?
What about more than one instance of tomcat fo
There would be no adverse effect on garbage collection (i.e. longer GC
times) when moving from max heap of 1gb to 4gb?
-nikita
Leon Rosenberg wrote:
are you using a 64bit version? If yes than the answer is yes.
Otherwise its probably no :-)
regards
Leon
On 9/5/06, Asensio, Rodrigo <[EMAIL PR
are you using a 64bit version? If yes than the answer is yes.
Otherwise its probably no :-)
regards
Leon
On 9/5/06, Asensio, Rodrigo <[EMAIL PROTECTED]> wrote:
Hello guys
tomcat 5517
java 1508
win 2003 server
I have available 4 gb of ram memory into the server. My tomcat is
running with 1024
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