How to measure Java CPU & memory usage

Hi,
I'm not sure whether this is the right forum to post this message.
I have a java application and basically it takes lots of CPU time and memory. What my concern right now is the CPU usage. Basically I reduced the number of CPUs from 8 to 4 (Solaris v1280 box) and the CPU usage got increased from 30% to 90% :(
My requirement: Is there anyway that I can measure the CPU usage using Java code itself, so that I can insert those "set of APIs" (for measuring CPU usage), between APIs to collect the CPU usage data?
Thanks,
Siva

Take a look at this.
http://articles.techrepublic.com.com/5100-10878_11-6067049.html

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CPU Memory usage

CPU memory usage is keep increasing whenever, I have opened a package from SQL developer. I am using the latest version (4.0.0.13.80) of sql developer. How to resolve this.?

Hi,
If you use Oracle 10g v.2 you can take a look and recomendations about memory tuning using AWR (Analytic Workload Repository). Of course , theoretically , you can take a look on Oracle doc titled 'Oracle Performance Tuning '.
Sorry , i didn't know that your database is 9i. However , if you open Enterprise Manager Console on Memory Section you can find the memory statistics of your database and some pieces of advice , as well.....
Simon
Message was edited by:
sgalaxy

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When you connect your phone to the Mac, iPhoto should fire up and offer to import your photos. So do so, selectively if needed. Then make sure they are backed up to external media in case your Mac dies. Then delete them from the camera roll in the iPhone.
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CPU/memory usage of AIR application under Mac 10.4.10

As my AIR application uses a lot of CPU/memory under Mac
(seems better in Windows), I decide to do some basic testing. I
create several applications with different level of complexities.
Below is a table of CPU/memory usage when the application is simply
sitting there. A brief description of the application can be found
in the end of each line.
Here are some results:
[1] Even for an empty application, CPU usage is not zero
(most non-AIR application has 0 CPU usage when doing nothing). Also
the memory usage is huge, comparable to Finder on my computer.
[2] Empty application has 7 threads running.
[3] Indetermined progress bar costs a lot of CPU; and I guess
any other animation costs a lot of CPU too. But if they are
invisible they are fine.
[4] running timer costs CPU.
PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE
VSIZE application
10093 adl 1.8% 0:01.85 7 100 292 15.0M 13.8M+ 22.8M 444M
empty
10094 adl 1.9% 0:01.55 7 100 299 15.2M 14.0M+ 23.1M 444M
label
10097 adl 1.9% 0:01.48 7 100 302 15.3M 13.4M 23.7M 445M
progress bar
10095 adl 5.7% 0:02.40 7 100 302 15.4M- 13.2M 23.5M 445M
progress bar (indetermined)
10125 adl 15.9% 0:03.66 7 100 304 15.7M- 13.4M 23.9M 445M 5
progress bar (indetermined)
10126 adl 29.7% 0:10.39 7 100 325 16.7M+ 13.4M+ 24.9M+ 445M
10 progress bar (indetermined)
10128 adl 1.9% 0:01.34 7 100 324 16.1M 13.7M 24.3M 445M 10
progress bar (indetermined), visible=false
10136 adl 1.8% 0:00.76 7 100 323 16.5M+ 13.9M+ 24.7M- 450M
Empty datagrid
10147 adl 1.9% 0:01.60 7 101 328 16.1M 13.8M+ 24.5M- 447M
TabNavigator with two empty VBox children
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datagrid with 10000 simple rows
10131 adl 3.1% 0:02.38 7 110 348 25.7M 19.3M 34.8M 458M 10
Empty native windows
10143 adl 1.9% 0:00.99 7 100 296 15.1M 13.9M+ 23.2M- 444M
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10145 adl 4.1% 0:02.35 7 100 298 15.0M 14.0M+ 23.2M- 444M
Timer, delay = 100ms, calling function update label position
As to my own application, it's much bigger than these simple
ones. The CPU usually stablizes to 20% and VSIZE is about 1G. There
is no timer running. When I leave the application open for a few
hours, the application will eventually freeze and I have to kill
it.
I am wondering if there are any articles or documents
explaining AIR's CPU/memory usage. And also if AIR is planning to
improve the performance in the next release.

James, thank you for the very fast answer! I did various tests on the weekend on my computer and computer of my friend.
And I can say, that Debug flag doesn't affect memory consumption. They still eat memory. My steps to reproduce are as follows:
(Windows 7 32 bit)
Photoshop CS5:
1) set HKEY_CURRENT_USER\Software\Adobe\CSXS2Preferences\PlayerDebugMode to 0
2*) check HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\CSXS2Preferences (just in case)
3) Compile HelloPhotoshop example to ZXP and install via Extension manager
4) restart computer
5) Run Photoshop CS5 - Memory consumption: 100 096 KB
6) Open HelloPhotoshop and close it 10 times
7) Memory consumption: 155 840 - 5,574 MB per one close/open
Maybe a garbage collector is expected to run and free this memory, but it never happened in my case. The memory pool was increasing to 1 GB when I was working with one of my panels - with no documents open in Photoshop
In InDesign I tried the same thing with HelloInDesign ( I had to close the panel completely and then open with Window | Extensions | HelloInDesign)
Memory consumption on start: 118 516
Memory consumption after 10 open/close cycles: 197 516
It's 7,9 MB per one close/open
It's the simpliest panel test. When I'm using AIR libraries the memory usage is increasing a lot faster.

CPU/Memory Usage increases when loading SWF files in AIR.

Hi,
We face the below mentioned problem. Would be great if someone could help us.
Due to problems with uploading the attachment here, please send a email to the following email-id ([email protected]) and I shall send the attachment in response.
CPU/Memory usage increases drastically while moving the SWC components and loading the SWF Files.
"Problem Description" - On executing the sample application, a window with multiple objects is shown. The loaded SWC components in flex consume too much Memory and CPU cycles. This is visible in TaskManager. On dragging one of the object, CPU / memory usage increases drastically.
"Steps to Reproduce" -
Draggable window is placed at the bottom in the sample application with Text indication.
Drag the indicated window.
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"Expected Result" - Drastical increase in memory\CPU should not occur.
"Any Workarounds" - No"
Thanks in advance.

You can control your external swf from your main.swf in the following method:
loadswf(clips[0]);
function loadswf(tmp:String):void{
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    ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, swfLoaded);
    ldr.load(new URLRequest(animPath+tmp));
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        ploader.visible=true;
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        mcExt = e.target.content as MovieClip;
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        ploader.visible=false;
        addChild(mcExt);
function onEnterfn(e:Event):void{
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        case clips[0]:
            if (num==1) mcExt.play();
            if (num==9) {
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Measure Java CPU usage

Hi,
I'm not sure whether this is the right forum to post this message.
I have a java application and basically it takes lots of CPU time and memory. What my concern right now is the CPU usage. Basically I reduced the number of CPUs from 8 to 4 (Solaris v1280 box) and the CPU usage got increased from 30% to 90% :(
My requirement: Is there anyway that I can measure the CPU usage using Java code itself, so that I can insert those "set of APIs" (for measuring CPU usage), between APIs to collect the CPU usage data?
Thanks,
Siva

The comparison would be unfair (by your definition of unfair) in Java, too, since the JVMs for both platforms are different.
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Since you are trying to compare operating systems, make sure both machines are using the same processors (and motherboards with the same PCI bus architecture), too. And have the same amount of memory, which is the same speed and architecture on both. Their hard drives should be roughly the same speed, too. The PCI bus usage could vary with network cards, so having the same network cards will be a plus. What it seems to come down to is that you are going to end up measuring the performance of the socket library implementations on both machines.
As far as JNI goes, all it is is a way to write native code and use it in your Java application. I don't know much about it, search around for some examples. There's a tutorial, somewhere, too. Some dude on here, tpritchet, seems to know a lot about it.
Jason

CPU & Memory usage is more..

Dear Friends,
i have developed my ticker with alert option using Flash and
AIR. it is running fine! As a ticker it has to run contineusly,
when it runs contineouly mymemory usage and cpu usage is keep on
getting increased and the memory usage size also more. pls give me
the suggestion how to reduce it. becoz, this ticker has to run
contineously, in one stage it may hang the system it seems...
pls be informed that, previously i used timer, to reduce
memory problem and cpu usage, removed timer and i inserted a
moviclip running for 1 sec, end of movieclip i triggered the
event... then also the same memory usage iam getting..
pls give me some solution for this....
Regards,
Syed Abdul Rahim

I recently published a blog post which might help you.
http://spreadingfunkyness.com/garbage-collection-with-flex-and-adobe-air/
Also check out the references at the bottom.
Hope this helps.

How to analyse the main memory usage in SAP ERP systems?

Dear expert,
I'm doing a research work about analysing the main memory usage in SAP ERP systems.
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How to measure true CPU usage?

Hello,
I have a program that runs on a Windows XP 32 bits machine with JRE 6u16 (8 [email protected], 16gig ram). This program gets 100,000 messages per minute, does something with it and republishes the data.
We recently moved the same program to a Linux box, same spec, 64 bits however.
When running Visual VM via JMX on both in //, we can notice huge CPU utilization on the Linux box, vs. the Windows one.
I expected the Linux version to kick arse.
My question is, how to effectively measure raw performance on a multiple-CPU machine, Windows and Linux?
Also, how does the CPU graph works in jConsole or VisualVM? Average of all CPUs?
Thx v much

Take a look at this.
http://articles.techrepublic.com.com/5100-10878_11-6067049.html

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This is a quection for the Developer forum.

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I've been using mozilla software for a very long time, but lately memory usage in firefox has been getting far too out of hand. I used to be able to have hundreds of pages open without using too much memory, but for some time now I have only been able to have a fraction of the number of pages open before hitting the same levels of memory use. A new firefox session I opened today hit 600 megabytes of memory after loading 7 pages. Earlier today, firefox was collectively using over 20 *gigabytes* of memory. This is all for firefox itself, which is set up without any extra plugins beyond the basic ones for flash, java, and audio/video. Sometimes I've gone to using elinks for some of my "main" browsing just to avoid the extra memory bloat, but I would much rather use a more complete browser when I don't need to browse through a ssh tunnel.
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*https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix
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* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]

How to measure CPU utilization from Oracle AWR

Hi All,
How to measure the cpu usage % from the AWR reports.
Oracle : 10.2.0.3
OS : AIX 5300-12-02
I see the top 5 waited events listing CPU time in it.
Top 5 Timed Events Avg %Total
~~~~~~~~~~~~~~~~~~ wait Call
Event Waits Time (s) (ms) Time Wait Class
CPU time 98,655 40.0
Is it mean that the CPU utilization is full to its 100%. Is there any other way to measure how much an oracle instance is utilizing the CPU ?
Please advice.
TIA,
Nv

Hi,
Check this script, if possible run in toad.
col LastCallET format 99,999
col cpumins format 99,999
col status format a1 trunc
col module format a20
col username format a15
col logontime format a12
col machine format a15 trunc
col sid format 9999
select * from (
select 'P',s.sid, s.status, t.value/100/60 cpumins ,
     floor(last_call_et/60) "LastCallET",
     to_char(s.logon_time,'mm/dd hh24:mi') logontime,
     s.username,s.process, p.spid, s.module , s.machine, s.sql_hash_value
from v$sesstat t, v$session s, v$process p
where t.statistic# = 12
and s.sid = t.sid
and s.paddr = p.addr
and s.type = 'USER'
and s.sql_hash_value != 1425819161
union
select 'N',s.sid, s.status, t.value*-1/100/60 cpumins ,
floor(last_call_et/60) "LastCallET",
to_char(s.logon_time,'mm/dd hh24:mi') logontime,
s.username,s.process, p.spid, s.module , s.machine, s.sql_hash_value
from v$sesstat t, v$session s, v$process p
where t.statistic# = 12
and s.sid = t.sid
and s.paddr = p.addr
and s.type = 'USER'
and s.sql_hash_value != 1425819161
and t.value < 0
order by 4 desc)
where rownum < 11
Regards,
Satya.

Best practice for CPU and memory usage?

I find my AIR application takes a lot of memory -- usually
>170M. And what is strange is that the memory usage is
increasing (about 4K/s) even when the application is simply sitting
there and do nothing. The CPU usage is supposed to be 0% when the
application is doing nothing, but it's not (usually ~5%). So I
wonder if there is any article about best practice on CPU/Memory
usage.

Those numbers indicate that your application is in fact doing
something. Perhaps you have a timer still running, or work being
done on an enterFrame event?

How to reduce memory usage?

OK - I've read through a ton of posts that discuss the "Out of memory" problem in Encore, but what can I do to reduce memory usage?
I'm trying to produce a very simple Blu-Ray (h.264) project in Encore CS3 on Windows Vista. There are 8 or 9 timelines, a main menu, and 6 sub-menus. Each sub-menu has six static buttons. There are no transitons or motion menus. When I load the project, Task Manager says Encore is using about 1.3 GB RAM. I constantly get "out of memory" errors.
I've loaded the same project on Vista 32-bit w/ 4GB RAM and Vista 64-bit w/ 8 GB RAM. Same behavior on both.
Two questions:
1. Why does Encore need 1.3 GB RAM for such a simple project?
2. How do I reduce the memory usage?
TIA for help on the PITA,
rgames

Please check with below link, if this can help.
http://forums.creativecow.net/thread/145/863785#863796

How to measure Java CPU & memory usage

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