Solaris JVM memory footprint

WLS8.1sp4 running on Solaris configured with:
-Xms1024m -Xmx1024m -XX:NewSize=256m
-XX:MaxNewSize=256m -XX:PermSize=256m
-XX:MaxPermSize=256m -XX:SurvivorRatio=3
-verbosegc -XX:+PrintGCDetails
Monitoring java process with "pestat" shows that memory consumption is constantly growing:
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
26607 acms 1505M 446M run 0 10 0:02.51 9.3% java/66
26607 acms 1529M 487M run 28 10 0:02.39 18% java/66
26607 acms 1560M 542M run 0 2 0:04.09 16% java/66
26607 acms 1604M 620M sleep 20 10 0:00.31 11% java/66
26607 acms 1645M 687M sleep 20 10 0:00.31 13% java/66
26607 acms 1687M 752M run 28 10 0:04.34 20% java/66
26607 acms 1719M 811M run 1 10 0:03.26 17% java/66
26607 acms 1764M 880M run 19 10 0:03.12 19% java/66
26607 acms 1803M 960M sleep 20 10 0:00.31 20% java/66
26607 acms 1857M 1038M run 28 10 0:01.07 19% java/66
26607 acms 1879M 1090M run 28 10 0:01.43 15% java/66
26607 acms 1889M 1248M run 20 10 0:01.41 50% java/65
26607 acms 1924M 1440M sleep 20 10 0:00.31 24% java/65
Application uses BEA XA OCI drivers to connect to Oracle 8.1.5 (I know that it's old and oci should be replaced with thin). Is there any way to prove that memory is growing in native oci?

Sorry, this newsgroup is about JRockit (which isn't available for solaris - yet).
/Staffan

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Does anyone have any advice as to which direction I should go in as regards JRE ?
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I haven't checked into it thoroughly, but I've heard repeatedly that 1.4 has a smaller ram footprint. It is still in beta, so that may not be the way you want to go, but you still may want to look into it.
m

Low Memory Footprint JVM needed, Please suggest.

Hi guys,
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Thanks,
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Dhaval.Yoganandi wrote:
can you flash more light on it ?
Dhaval.Yoganandi wrote:I'm currently using Sun JVM with Java 1.5 its taking 35-40 MB of RAM and 333 MB in VRAM. I need to make very low. how can I do that ? I've tried many options to start sun JVM but no luck.. Virtual Memory is reduced to 280MB nothing else.. I want it to consume Virtual Ram only 64MB and RAM only 30MB..
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Optimization of the JVM memory - Garbage Collector

Hi ,
Just a question about JVM memory management.
There is memory limitation of memory usage limitation (1.6M) in JVM.
Is there any possibility to use "Garbage collector" mechanism to optimize the memory usage?
Or any suggestions for the JVM memory optimization?
Thanks a lot!!!

nicolasmichael wrote:
Hi,
the "memory limitation" does not have anything to do with garbage collection, but with the address space your operating system provides. On a 32bit operating system, your virtual address space is limited to <= 4 GB, depending on your operating system (for example 1.something GB on Windows and 3.something GB on Solaris). No.
Windows 32 bit has a 2 GB application space and can be configured to allow a 3GB space.
The Sun VM does not allow more because of the way that the executable is linked.
[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4358809]

JVM memory breakup

Hi,
My java application (with jdk1.5.0_03) shoots upto 169 MB of Process size (seen in Task manager)
and the heap size when printed (Runtime.totalMemory()-Runtime.freeMemory())
shows as 68 MB. I assume that the process size is the total JVM memory.
I would like to know exact breakup of JVM memory; is it possible to find out the individual parameters that contribute to the total process memory.
Thanks
Srila

Hi,
I have a similar kind of problem.
We have a web-application running on jdk1.5 and tomcat 5. I want that my application should not take more than 48 MB memory on to my machine. I used the -Xmx48m option, but it just controls the heap memory. But what about the non-heap memory? Here are few things I have noticed
-> when I use JConsole to monitor the application, I found that my applications non-heap memory Max is set to 96M.
-> Another thing I have noticed that when I use "top" command to monitor memory footprint of my application, the RSS (which shows the PHYSICAL MEMORY USED ) shows an alarming 125MB of usage ( Sometimes when i use -server option it used to go upto 250M ) , which may harm my other applications which are memory prone. Even when the GC runs java do not free any memory for other application.
-> I have tried many options like
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     but failed to restrict it to 48M
Before using Sun JDK5 we are using IBM jdk1.3 with tomcat 3 with green thread. So we were able to configure it with just one option -mx48m. I am really stuck. I cannot believe that Sun have not given us any control on the maximum memory usage. Please help me .
Regards
Purav Gandhi

SQL Developer Memory Footprint

We're looking at replacing around 200 TOAD licenses with SQL Developer. The only technical concern is the memory footprint, as in many cases it would be run from a terminal server with dozens of people logging on. A VM Size of 150MB seems to be not unusual for SQL Developer, and that all adds up of course.
Are there any recommendations for reducing the memory footprint, or at least not letting it get much higher than 150? Features that can be turned off by default, versions of JDK, etc?

Hi,
The memory consume is quite worrying.
However change the code into VB / Delphi will lose its availability as Java's write once run anywhere. :-)
You won't be able to use this tool on Solaris, Linux, and Mac without changing the code and compiler. Thus would be less acceptable.
I wonder if limiting SQL Dev's initial class load would give impact on memory consume.
And why it seems that Java's garbage collector didn't do any collecting since the memory gets higher and higher time by time.
Or maybe the code doesn't allow the object's become collectable?
I ever get memory reach up to 500MB after doing a canceled Export Wizard for USER.
But..... memory would never come down.
Regards,
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How to minimize OC4J memory footprint?

We use Oracle 9iAS R2 on a Windows 2K server with dual Xenons and 2 GB physical RAM as an integration server. There the various developers all have differenct OC4Js set up for testing. Now an Oracle rep once told us that many OC4Js within an iAS instance are no big deal because an OC4J had a memory footprint of about 3 MB RAM.
That sounded too good to be true. And in our case, is isn't true - an OC4J takes up about 50 MB of RAM right after its start. I tried to minimize the Java heap through the OC4J server attbributes in Oracle Enterprise Manager (like "-Xms16") but that didn't make an ounce of a difference.
So what's the memory footprint of an OC4J inside an iAS instance? And can I reduce it somehow?

This must be a marketing gag. Client Swing Apps tend to consume more than 3MB.
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I've you found it - please tell me! :-)

Memory Footprint meaning

What do u exactly mean by Memory Footprint? How can u ascertain whether memory footprint has a major role to play in a variable?

What do u exactly mean by Memory Footprint? The term is usualy used for the amount of memory used by the JVM itself for its operation, not counting the memory needed for the programs it runs.
How can u
ascertain whether memory footprint has a major role
to play in a variable?Huh?

JavaServer memory footprint - 80-100MB

Hi,
We are running WLE 5.1 (patch 63) on Solaris 7. Our WLE domain contains a
combination of Java and C++ servers. We are concerned about the memory
footprint of the Javaservers. On Solaris, the image size of each
'JavaServer' ranges from 80MB up to 110MB. We are running up to 20
Javaservers in each domain so obviously, we are very concerned about this in
production. Even simpapp uses up to 50MB !
Are there any good approaches to reduce the footprint of the Java servers
e.g. Will combining multiple servers into a single VM (using the MODULE
syntax) help ?
We have tried the -mX etc. commands on the VM but with little impact or
success.
Thanks
Dermot

You can find out the address ranges for your young generation, old generation, and permanent generations by running with the -XX:+PrintHeapAtGC flag. That produces output meant for VM developers, but the information is there. You'll get something like Heap after GC invocations=2 (full 1):
PSYoungGen      total 3584K, used 0K [0xffffffff38000000, 0xffffffff38400000, 0xffffffff78000000)
eden space 3072K, 0% used [0xffffffff38000000,0xffffffff38000000,0xffffffff38300000)
from space 512K, 0% used [0xffffffff38300000,0xffffffff38300000,0xffffffff38380000)
to   space 512K, 0% used [0xffffffff38380000,0xffffffff38380000,0xffffffff38400000)
PSOldGen        total 8192K, used 134K [0xfffffffeb8000000, 0xfffffffeb8800000, 0xffffffff38000000)
object space 8192K, 1% used [0xfffffffeb8000000,0xfffffffeb8021a98,0xfffffffeb8800000)
PSPermGen       total 24576K, used 2415K [0xfffffffe98000000, 0xfffffffe99800000, 0xfffffffeb8000000)
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That said, I don't know what your mapping is at 0000000100114000 is. Do you have any native libraries that malloc space?

CF 8 JVM memory is not being garbage collected.

I am baffled by something I am seeing on my QA server. I have
an app that we load tested but when the test completed the JVM
memory used was not released. I used CF Server Monitor to watch the
memory usage and sometimes it spiked to the max and either the app
failed or I got timeout exceptions.
This is the only app running on this server and the testing
completed over an hour ago but the memory has not been released
yet.
CF Admin settings:
Maximum JVM Heap Size (MB) 512
The CF Server JVM Setting arguments include: -server
-Dsun.io.useCanonCaches=false -XX:MaxPermSize=192m
-XX:+UseParallelGC
I found a script that uses java.lang.Runtime and
java.lang.management.managementFactory that dumps a JVM memory
usage profile The latest dump follows:
JVM Monitor - ColdFusion Server - Enterprise v8,0,1,195765
JVM Memory Monitor - struct
Heap Memory Usage - Committed 481 MB
Heap Memory Usage - Initial 0.00 MB
Heap Memory Usage - Max 493 MB
Heap Memory Usage - Used 437 MB
JVM - Free Memory 44.0 MB
JVM - Max Memory 493 MB
JVM - Total Memory 481 MB
JVM - Used Memory 449 MB
Memory Pool - Code Cache - Used 8.80 MB
Memory Pool - PS Eden Space - Used 6.37 MB
Memory Pool - PS Old Gen - Used 428 MB
Memory Pool - PS Perm Gen - Used 52.4 MB
Memory Pool - PS Survivor Space - Used 3.50 MB
Non-Heap Memory Usage - Committed 62.8 MB
Non-Heap Memory Usage - Initial 18.3 MB
Non-Heap Memory Usage - Max 240 MB
Non-Heap Memory Usage - Used 61.2 MB
According to the CF Server Monitor JVM memory usage builds up
to 477 MB then the app fails or timesout.
Session Scope memory usage: 0.27 KB
Application Scope memory usage: 1.370 KB
Server Scope memory usage: 3.12 KB
Since the test ended JVM Memory Usage has dropped back to 438
MB?
Besides CFAdmin nothing else is running on this CF Server.
I've read several other memory related topics but none of them have
helped.
Can someone tell me why the memory isn't being release? How
can I further troubleshoot the problem?
Thx
pwp

> Adam Cameron wrote:
>
The maximum stable heap size I've managed to get is around
> 1.0-1.2GB, on a win32 system. On Solaris (running a
32-bit JVM),
> about 1.4GB. It *seems* like GC doesn't actually clear
out RAM
> properly if more than that much RAM is being
addressed.
>
> Yes, there is a well-known
>
http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_19359&sliceId=1
Not really what I was talking about. One might be able to get
the CF
instance to *start* with 1.8GB allocated to the heap, but it
won't actually
work. I've managed to get a server to idle for a reasonable
length of time
on 1.5GB, but as soon as the thing started to ramp up, it
face-planted,
once it started actually trying to *use* the higher end of
the RAM
allocated to it. At 1.2GB, it'll seem to run OK for a
reasonable length of
time, but eventually it starts leaking memory; at around 1GB,
it was pretty
stable.
Hence my comment about it being *stable* at that allocation.
Not that "it
simply won't start if more than 1.8GB is allocated to it".
My point was that your rule of thumb:
maximum heap size(Xmx) = RAM(in MB) / (2 * number of servers
using the
JVM)
Is not a very good one. Plug 4GB RAM (so a small server) and
one CF
instance into that equation. Your rule suggests I should be
allocating 2GB
to the heap. Which - as you yourself pointed out - won't
work.
Adam

Reducing JRE memory footprint

I want to deploy what may turn out to be a JavaSpaces application on some Windows PC clients. These clients will receive event notifications from a central server and then pop up a GUI for the user to respond to. These clients may be memory-limited and am worried about deploying a J2SE runtime purely for this application and eating up 30+Mb of RAM.
J2ME runtime seemed like it offered hope as regards reducing memory footprint but doesn't really seem aimed at a standard PC.
Does anyone have any advice as to which direction I should go in as regards JRE ?
Gary Roussak

Not all of the virtual memory assigned to a process is a problem - you need to look at the amount of memory that is commited (i.e. consumes pages of RAM and/or disk) to the process and not shared with other processes. Furthermore, the working set (the memory that has been recently accessed and needs to be in memory to avoid thrashing) is often much smaller than that.
You can substantially reduce the private memory needed by the JVM by minimizing the heap size (-Xmx and -Xms parameters) - I've been able to run real programs accessing databases in as little as 2MB of heap.
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I'm on iTunes 11.0.0.63 for Windows. iTunes used to display the total number of songs in my library, along with total playtime and memory footprint, at the bottom of the window. How can I make it display this information like it used to?

Hello! Thanks in advance for reading my question.
so, I updated iTunes to 11.0.0.63 on Windows, and the new layout looks nice, but iTunes no longer gives my total song count, memory footprint, and total play-time at the bottom of the window, the way it used to. I just want to know how to get that info back. Thanks so much!

Ctrl / or View > Show Status Bar should do it.
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tt2

JVM memory allocation

Hello, I am writing a program that requires me to read large files into memory. Since the JVM has a heap limitation, I am setting the max memory with the -Xmx"number"m command line command. I then create an exe wuing JBuilder. For some reason, I can't make an exe that is calls for more than 1475m. Does anyone know of a way to remove the JVM memory limitation all together? BTW, I can set any memory parameter I want to and run it in jbuilder so long as it is in my machine's limitations. It is only when i create an EXE that it gets theis limitation.

It is only when i create an EXE that it gets theis limitation.Then I guess you shouldn't create an EXE.
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Increasing JVM memory size at runtime

I want to increase the JVM memory size at runtime.
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What would be the proper implementation to incerase the memory size?

aurora.zip

When i upload the files thorugh internet jvm memory is taking so much.

i have integrated a file upload in my webapplication(JSP)
when i upload the files thorugh internet jvm memory is taking so much.
how can i reduce it.
any open source for file upload process is there?
thax,
R. Ramasubramaniam.

Suggestion: read [the documentation|http://commons.apache.org/fileupload/using.html] for it.
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If you are really worried about memory, perhaps you should take a look at the [streaming API|http://commons.apache.org/fileupload/streaming.html]
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How many users are we talking about?

Solaris JVM memory footprint

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