08-11-2006
See my reply inline:
If my application is not stressing the CPU , why it consumes 50 % in prstat.
>> Even if it is 100% CPU util, it doesn't mean that you don't have enough CPU resources. You run out of cpu ONLY when there is a queue of runnable processess waiting for CPU time slice. In short, 100% CPU util means the CPU is working hard for your processes (doesn't mean there is not enough).
In all the other servers where I have same application installed it consumes only 5 -10% of CPU. Even in this bad server initially when i start it uses 5-10% of CPU when I start doing some action in the IdM application it rises to 50% and is slower.
>> See my reply above. 50% does not mean much.
The other inhouse applications deployed on the same server work well even if the CPU consumption is 50 %.
>> Exactly. If other application on the same server has no performance problem running, this means you have ample CPU resources on the SAME server.
If javasrvr consume 5-10% , the application works fine as it is in other servers, but when it rises to 50 % the application stops working in this bad server.
>> My guess is there is some performance bug with a particular function that is triggering the workload. You have to talk to the developer of the application and get them to draw some workflow diagram to understand where is the problem.
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CPU(8) System Manager's Manual CPU(8)
NAME
cpu - A tool for user and group administration
SYNOPSIS
cpu [OPTIONS]
DESCRIPTION
CPU is a tool for user administration, that was initially based on FreeBSD's pw(8). This tool will allow you to administer users and groups
on several different backends currently including LDAP and flat files. Please see the website http://cpu.sourceforge.net for more informa-
tion, or help improve the man page.
OPTIONS
There are two kinds of options; options for CPU and options for CPU modules. There are only four options for CPU, they are as follows:
-C configfile, --config configfile
The configuration file to be used by CPU. The options in this file are used for CPU modules.
-h, --help
Display help for CPU. If specified in conjunction with the -m option the help for that particular module is displayed.
-M method, --method=method
This is the method of administration. Current options are ldap or passwd (passwd is not yet working). This can be specified in the
configuration file.
-V, --version
Display the version of the software.
SEE ALSO
cpu.conf(5) cpu-ldap(8)
AUTHORS
Blake Matheny <bmatheny@purdue.edu>
The current version of this software is always availabe at http://cpu.sourceforge.net
BUGS
To report a bug or problem, please e-mail:
cpu-users@lists.sourceforge.net
TODO
See TODO file that accompanied software. Please e-mail us with any additional suggestions.
17 February 2003 CPU(8)