Setting memory heap size

Hi,
I would like to know how to set the default memory
heap size to 128 MB while installing the Java Plugin
itself.
Is there any environment variable available for setting
this?
I dont want to use the Control Panel option for setting
it.
Thanks for your help.

Hey i have the same issue, how did you solve it?
Hi Gkumarc1,
Plugin 1.3.0 (and after) reads the property filein
.java directory of user's home directory. Java
runtime parameter is saved in the property file.Here
is an example of it:
# Java(TM) Plug-in Properties
# DO NOT EDIT THIS FILE. It is machine generated.
# Use the Activator Control Panel to editproperties.
javaplugin.jre.params=-Xmx 128m
Hope this helps.
Sun-DTSIs there a way to set the default heap size on the
fly? Meaning, we want to avoid the need for our
customers to go into their control panel and make
this setting. Instead, we would like to have the
applet load with our preferred default VM size. This
would allow us to change the preferred size during
some future performance enchancements without having
to contact all of our 2,000+ external customers. Is
there something that can be put in the PARAM tag
within the HTML that specifies the
preferred/recommended default size?
Any help would be greatly appreciated.

Similar Messages

DPS 6.x jvm memory heap size?

I am setting up directory proxy server 6.3 and have the java setting for memory heap size in my notes from testing last year. Is it important to set this? Is the argument as stated ok? And is 500 ok? Doubt anything has changed since last year, but want to be sure. Thanks.
dpadm set-flags /opt/dps jvm-args="-Xmx500M -Xms500M -XX:NewRatio=1"

crosspost

How to set the Heap size for JAVA

I am facing the memory out of space problem:
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
Could anyone suggest me a solution to solve the problem ?
increase the heap size ?
anyway to increase the heap size in the program by default without additional setup?
Thank you.

How to determine the program must handled with increase heap size ?
could I know any method to know whether the program is memory leaking or need large memory heap size?

How to set the heap size of JVM

please let me know that how to set the heap size of JVM

C:\>java -X
    -Xmixed           mixed mode execution (default)
    -Xint             interpreted mode execution only
    -Xbootclasspath:<directories and zip/jar files separated by ;>
                      set search path for bootstrap classes and resources
    -Xbootclasspath/a:<directories and zip/jar files separated by ;>
                      append to end of bootstrap class path
    -Xbootclasspath/p:<directories and zip/jar files separated by ;>
                      prepend in front of bootstrap class path
    -Xnoclassgc       disable class garbage collection
    -Xincgc           enable incremental garbage collection
    -Xbatch           disable background compilation
    -Xms<size>        set initial Java heap size
    -Xmx<size>        set maximum Java heap size
    -Xss<size>        set java thread stack size
    -Xprof            output cpu profiling data
    -Xrunhprof[:help]|[:<option>=<value>, ...]
                      perform JVMPI heap, cpu, or monitor profiling
    -Xdebug           enable remote debugging
    -Xfuture          enable strictest checks, anticipating future default
    -Xrs              reduce use of OS signals by Java/VM (see documentation)look at the -Xm? lines
    -Xms<size>        set initial Java heap size
    -Xmx<size>        set maximum Java heap sizeThis can be used e.g. like this:java -Xms8M -Xmx32M MyProgwhich runs MyProg in a java VM with the initial heap size of 8 MB and a maximum heap size of 32 MB.
- Marcus

Setting the heap size

Hi all,
I wanted to ask you about setting the heap size value.
How we can calculate the heap size?
I had problems with the max heap size in my application.
So I increased the max value to 2048 MB, but I am afraid that
the same error may come up again some time depending upon the
usage.
So how I can find, say for a server having 2 GB RAM,
how much heap size I should give? I read that there is no defined
formula to calculate this. But I wanted to get the best way of doing it.
Please advise,
Sandeep

As has already been said, you probably have a leak. However, when trying to gauge the maximum heap you can (not should, but can) use you have to take into account what the server is doing, and its operating system. You do not want your JVM to page. So, for a 2GB server, with no other app on it, I think the "usual" is something like 75% max? Though I really wouldn't take my word for it...it's not my field.

How to set the heap size in adminstrative console

Hi All,
Please let me know how to increase heap size in weblogic Adminstrative console.
Regards
Madhu

The answer to this depends on whether you're trying to set the heap size for a manager server which is managed by NodeManager, or the admin server.
First click on "Lock and Edit".
If the former, go into "Environment"->"Servers", then click on the server you want to configure. This should start you on the "Configuration"->"General" tab. Now click on the "Server Start" tab. Find the "Arguments" field. Assuming this is blank, put something like the following in the field value:
-Xmx1536m
Then click "Save", then "Activate Changes". When you restart the managed server the next time, it should use those new settings.
If, however, you're trying to set this on the admin server, you can't do this in the admin console at all. In that case, go into $DOMAIN_HOME/bin and edit the "setDomainEnv.{sh,cmd}" script (".sh" if on Unix/Linux, ".cmd" on Windows). Find the line that sets the "MEM_ARGS" variable, like the following on Windows:
set MEM_ARGS=-Xms256m -Xmx512m
Change this line to whatever you want, then restart the admin server.

Set the heap size

Hi,
I am wondering what's the default heap size if I don't add -ms -mx opation? I
set the two options and the following is the output from -verbosegc. what's it
means?
Thanks.
[GC 2598K->2145K(2696K), 0.0035829 secs]
[GC 2656K->2201K(2824K), 0.0036262 secs]
[Full GC 2713K->2070K(4028K), 0.1933980 secs]
[GC 2582K->2229K(4028K), 0.0046565 secs]
[GC 2741K->2373K(4028K), 0.0061002 secs]
[GC 2885K->2514K(4028K), 0.0064346 secs]
[GC 3026K->2656K(4028K), 0.0061670 secs]
[GC 3168K->2798K(4028K), 0.0054694 secs]
[GC 3310K->2940K(4028K), 0.0054521 secs]
[GC 3452K->3080K(4028K), 0.0058119 secs]
[GC 3592K->3216K(4028K), 0.0059069 secs]
[GC 3728K->3357K(4028K), 0.0057200 secs]
[GC 3869K->3496K(4028K), 0.0055719 secs]
[GC 4008K->3636K(4156K), 0.0057239 secs]
[Full GC 4148K->3649K(6544K), 0.3064887 secs]
[GC 4091K->3773K(6544K), 0.0412259 secs]
[GC 4285K->3912K(6544K), 0.0052336 secs]
[GC 4424K->4051K(6544K), 0.0055661 secs]
[GC 4563K->4189K(6544K), 0.0055543 secs]
[GC 4701K->4326K(6544K), 0.0055703 secs]
[GC 4838K->4464K(6544K), 0.0055915 secs]
[GC 4976K->4608K(6544K), 0.0059667 secs]
[GC 5120K->4746K(6544K), 0.0053261 secs]
[GC 5258K->4884K(6544K), 0.0053761 secs]
[GC 5396K->5023K(6544K), 0.0059290 secs]
[GC 5534K->5159K(6544K), 0.0054320 secs]
[GC 5671K->5301K(6544K), 0.0114341 secs]
[GC 5813K->5405K(6544K), 0.0103658 secs]
[GC 5917K->5492K(6544K), 0.0053194 secs]
[GC 6003K->5592K(6544K), 0.0107092 secs]
[GC 6104K->5694K(6544K), 0.0096887 secs]
[GC 6206K->5786K(6544K), 0.0037949 secs]
[GC 6298K->5890K(6544K), 0.0101172 secs]
[GC 6402K->5990K(6544K), 0.0041271 secs]
[GC 6502K->6097K(6672K), 0.0040678 secs]
[Full GC 6609K->6191K(10992K), 0.2664733 secs]
Tue Dec 04 15:22:10 PST 2001:<I> <T3Services> CacheManagerImpl: EMAIL TEMPLATE
C
ACHE STARTING
[GC 6849K->6361K(10992K), 0.0586387 secs]
Tue Dec 04 15:22:10 PST 2001:<I> <T3Services> CacheManagerImpl: SCHEDULE CACHE
S
TARTING
[GC 7129K->6530K(10992K), 0.0083019 secs]
[GC 7298K->6678K(10992K), 0.0058533 secs]
[GC 7446K->6807K(10992K), 0.0052940 secs]
[GC 7575K->6920K(10992K), 0.0048598 secs]

I think the default heap size is 16MB, as for the GC output:
these [GC 2598K->2145K(2696K), 0.0035829 secs]
show the collection of Objects within the eden area of the heap (Short lived Objects),
the heap size before GC was 2598K and after GC was 2145K and the time taken was
0.0035829 secs.
These outputs:
[Full GC 2713K->2070K(4028K), 0.1933980 secs]
show the details for a full GC, these are the ones to watch out for, they will
take longer and the JVM (no mater how many processors) will block during a full
GC....I.E no server response at all.
The smaller the heap size the more often a full GC will occur, however the larger
the heap, the longer the full GC will take.
One of the new options for jdk 1.3.1 is the -Xincgc option, this will do incremental
Garbage Collection, overall it will take longer than normal, but the individual
Full GCs will take less time....so the server is not hung for as long at any one
time.
Set -Xms (the minimum heap) to the same as -Xmx (max heap), this increases performance
as the JVM does not have to repeatedly assign more memory to the heap.
Gareth
"Jen" <[email protected]> wrote:
>
Hi,
I am wondering what's the default heap size if I don't add -ms -mx opation?
I
set the two options and the following is the output from -verbosegc.
what's it
means?
Thanks.
[GC 2598K->2145K(2696K), 0.0035829 secs]
[GC 2656K->2201K(2824K), 0.0036262 secs]
[Full GC 2713K->2070K(4028K), 0.1933980 secs]
[GC 2582K->2229K(4028K), 0.0046565 secs]
[GC 2741K->2373K(4028K), 0.0061002 secs]
[GC 2885K->2514K(4028K), 0.0064346 secs]
[GC 3026K->2656K(4028K), 0.0061670 secs]
[GC 3168K->2798K(4028K), 0.0054694 secs]
[GC 3310K->2940K(4028K), 0.0054521 secs]
[GC 3452K->3080K(4028K), 0.0058119 secs]
[GC 3592K->3216K(4028K), 0.0059069 secs]
[GC 3728K->3357K(4028K), 0.0057200 secs]
[GC 3869K->3496K(4028K), 0.0055719 secs]
[GC 4008K->3636K(4156K), 0.0057239 secs]
[Full GC 4148K->3649K(6544K), 0.3064887 secs]
[GC 4091K->3773K(6544K), 0.0412259 secs]
[GC 4285K->3912K(6544K), 0.0052336 secs]
[GC 4424K->4051K(6544K), 0.0055661 secs]
[GC 4563K->4189K(6544K), 0.0055543 secs]
[GC 4701K->4326K(6544K), 0.0055703 secs]
[GC 4838K->4464K(6544K), 0.0055915 secs]
[GC 4976K->4608K(6544K), 0.0059667 secs]
[GC 5120K->4746K(6544K), 0.0053261 secs]
[GC 5258K->4884K(6544K), 0.0053761 secs]
[GC 5396K->5023K(6544K), 0.0059290 secs]
[GC 5534K->5159K(6544K), 0.0054320 secs]
[GC 5671K->5301K(6544K), 0.0114341 secs]
[GC 5813K->5405K(6544K), 0.0103658 secs]
[GC 5917K->5492K(6544K), 0.0053194 secs]
[GC 6003K->5592K(6544K), 0.0107092 secs]
[GC 6104K->5694K(6544K), 0.0096887 secs]
[GC 6206K->5786K(6544K), 0.0037949 secs]
[GC 6298K->5890K(6544K), 0.0101172 secs]
[GC 6402K->5990K(6544K), 0.0041271 secs]
[GC 6502K->6097K(6672K), 0.0040678 secs]
[Full GC 6609K->6191K(10992K), 0.2664733 secs]
Tue Dec 04 15:22:10 PST 2001:<I> <T3Services> CacheManagerImpl: EMAIL
TEMPLATE
C
ACHE STARTING
[GC 6849K->6361K(10992K), 0.0586387 secs]
Tue Dec 04 15:22:10 PST 2001:<I> <T3Services> CacheManagerImpl: SCHEDULE
CACHE
S
TARTING
[GC 7129K->6530K(10992K), 0.0083019 secs]
[GC 7298K->6678K(10992K), 0.0058533 secs]
[GC 7446K->6807K(10992K), 0.0052940 secs]
[GC 7575K->6920K(10992K), 0.0048598 secs]

Upto how much I can set maximum Heap size for jvm?

I am running application on 8GB RAM Windows 64 bits machine.
I am running out of OutOfMemory (Heap Space). I want to increase the Heap Size for my jvm.
But can anybody please tell me what is the limit by which I can set the maximum size for heap?
Thanks in Advance,
Jenish

Max allowed memory per process is 2 raised to the 64th power. What maximum memory you can set depends on the memory available
for your application. You may be able to set more than 8GB ram then it will use the swap space and it will slow down your application
performance. So try different memory size and see which one works best for your application.

Any side effects on JRE/JVM when setting Desktop Heap Size?

In Win2003 we experience a limitation of about 70 java.exe's. By setting the Desktop Heap Size we can increase this limit to more than double. Link showing more info on Desktop Heap Size:
http://blogs.msdn.com/ntdebugging/archive/2007/01/04/desktop-heap-overview.aspx
Does this give any side effects to the running java.exe's?
Has anyone experimented with this?

Hi Bobo
It seems to be a bit small. I have close the same configuration like you and set the
maxMemory to 512 MB/server
Regards Ruedi :-)
Bob Krause schrieb:
Hello,
I have a customer that is running WLS 6.1 sp4 and they have set the JVM max memory
value to 64M on a Sun Solaris box with over 6 meg of memory and 4 CPUs.
We have an application on it that makes use of connection pooling, session objects,
over 30+ stateless session beans, and has 100-200 users connected to the application
for 4-8 hours at a time.
Does this value of 64M make any sense??? This is the default out of the box setting
that we have setup on our development PCs.
Also as a side note, can any point me in the direction of any formulas for the
calculation of this number and also the number of execute threads.
Thank you,
Bob

Is it possible to set the heap size limits in system-wide config?

Hi,
I am trying to set the JRE heap size limits (-Xms and -Xmx) by using the system-level deployment.properties file. The JRE version is 1.6 update 6.
Normally, I would have something like this in the user-level deployment.properties file:
deployment.javapi.jre.1.6.0_06.args=-Xms64M -Xmx192MHowever, when the same line is put in the system-level properties, it does not seem to have any effect. I have tried different options, also unsuccessfully:
javaplugin.vm.options=-Xms64M -Xmx192M
or
javaplugin.minHeapSize=64m
javaplugin.maxHeapSize=192mIs it not possible to address this setting via system-level properties at all? I am hoping that I will not have to resort to per-user config files.
Best regards,
Martin

Hi Michael,
thank you for your answer. I am sorry, I was unable to find the link to the message 10144001.
My ultimate goal would be setting the system level settings as opposed to settings per applet. I was unable to find any mentioning of "deployment.javapi.jre.X.X.X_XX.args" in the official documentation here: http://java.sun.com/j2se/1.5.0/docs/guide/deployment/deployment-guide/properties.html
Best regards,
Martin

How to set max-heap-size outside the jnlp file?

Due to bug_id=6631056 It may not be possible to specify max-heap-size within
the JNLP file for certain jnlp java applications.
Are there other possibilities to specify this Jvm parameter?
In the ControlPanel there is the possibility to specify Xmx for applets but not for jnlp.
I have tried to add properties like
"deployment.javaws.jre.0.args=Xmx\=128M" without success
Many thanks

Even in JNLP also you can specify the max heap size
<j2se version="1.5+" initial-heap-size="128m" max-heap-size="512m"/>
Thanks,
Suresh
[http://sureshdevi.co.in|http://sureshdevi.co.in]

OJVM memory heap size

Is there a way to specify OJVM maximum memory ( memory heap )
for Oracle8i JServer? Oracle9i JServer?
How do I pass -Xmx parameter to OJVM?
Thanks

I played with JAVA_POOL_SIZE, JAVA_MAX_SESSIONSPACE_SIZE,
JAVA_SOFT_SESSIONSPACE_LIMIT and it seems that JServer just ignores them.
I use this Java function to get available space.
This function ALWAYS returns the same value ( about 120M for Oracle8i and 190M for 9i) in spite of init.ora parameters.
public static final int MEGABYTE = 1048576;
public static long testMemory(int maximumMegabytesToTest)
Object[] memoryHolder = new
Object[maximumMegabytesToTest];
int count = 0;
try
for (; count < memoryHolder.length; count++)
memoryHolder[count] = new byte[MEGABYTE];
catch(OutOfMemoryError bounded){}
long highWater = Runtime.getRuntime().totalMemory();
memoryHolder = null; //release for GC
System.out.println(highWater);
return count;
Please advise

Is there a way to set new default heap size for Java?

Hi,
I have a problem with setting global heap size for installed version of Java. By global I mean that every program that will be run using that version of Java, will be using that amount of memory. for heap. I know that I can use Xmx and Xms for each program that I start, but I don't want to do this. I just want to set some kind of property for installed version of Java.

Launch Firefox and set the web page as wide as you want by dragging the hash marks at the lower right corner. Center the page on your screen where you want it. Then quit Firefox. launch Firefox again. The page should be just where on the screen and sized as you set it prior to quitting.

Unable to set heap size to 4gb in sun java application server pe 8.2

i have sun v890 machine with 32gb ram and solaris 10
i am running sun java system application server platform edition 8.2
when i am setting max heap size to 4GB
it is giving an error
Invalid maximum heap size -Xmx4096m
the specified size exceeds the maximum representable size
i want to know what i should do to increase this heap size.
also tell me if the JVM running is 64bit. if not how can i change it
to 64bit VM.

The maximum size for a 32-bit process on Solaris (any 32-bit process, not just Java) is 4GB, which includes the program text, thread stacks, and various other things in addition to the JVM heap. So the maximum heap you can expect to allocate for the appserver is about 3500MB.
SJSAS 8.2 does not support a 64-bit JVM; SJSAS 9.1 is needed for that. However, it's very rare that a Java EE application actually needs that much memory, and the 64-bit JVM has a performance penalty vs. the standard JVM. So more heap is probably not going to make your app run any better.

Setting System-Wide Max Heap Size

We want to set the heap-size of Java-Plugin 1.5.0_14 for a company-wide rollout to a fixed size under Windows XP.
In deployment.config under C:\Winnt\Sun\Java\deployment I am giving this:
deployment.system.config=file:C:\\WINNT\\Sun\\Java\\Deployment\\deployment.properties
deployment.system.config.mandatory=true
In the respective deployment.properties I am giving
#deployment.properties
deployment.cache.max.size=50m
deployment.javapi.jre.1.5.0_14.args=-Xmx256m -Xms75m
While the cache-parameter is taking effect (visible in the Java Control Panel) there is no change in the Max Heap Size.
Any idea how this could be achieved?
Thank you
Michael

MaxHeapSize I determine with Runtime.getRuntime().maxMemory()
Setting it manually in the javacpl via -Xmx works fine but....
Problem is that we do not want each user to open his Java Control Panel and set this value manually.
May be error prone and difficult to communicate in a scenario where you have hundreds of users in different locations, countries etc.
Should be possible to set this value once installing the Java Plugin
Thank You
Michael

Setting memory heap size

Similar Messages

Maybe you are looking for