Start a new process when memory/cpu utilisation falls


 
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Old 11-03-2008
Start a new process when memory/cpu utilisation falls

Hi all,
I am a newbie to whole shell scripting thing. I deal with computational studies and a lot of softwares which run on linux. At times, I have to schedule my jobs after some process has started. In these case, I have to use at command to schedule my job.
However, I would like to know if there is a command or script which monitors the %cpu/memeory usage of my computer and when it fall a certain value, another predefined process(job) starts running.
I have also used wait command, but that is only useful with fresh start and not when one process is already running and I want to queue another job after it.
Basicaly I want to schedule the jobs one after one.
Thanks in advance.
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disown(1)							   User Commands							 disown(1)

NAME
disown - ksh93 built-in function to disassociate a job with the current shell SYNOPSIS
disown [job ...] DESCRIPTION
The ksh93 disown command prevents the current shell from sending a HUP signal to each of the specified jobs when the current shell termi- nates a login session. If job is omitted, disown sends the HUP signal to the most recently started or stopped background job. OPERANDS
The following operands are supported: job Specifies the job or jobs on which disown operates. Specify job as one of the following: number Refers to a process ID. -number Refers to a process group ID. %number Refers to a job number. %string Refers to a job whose name begins with string. %?string Refers to a job whose name contains string. %+ or %% Refers to the current job. %- Refers to the previous job. EXIT STATUS
0 Successful completion. >0 One or more specified jobs does not exist. EXAMPLES
Example 1 Disowning a Job The following example disowns job 1: example% disown %1 AUTHORS
David Korn, dgk@research.att.com ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO
bg(1), jobs(1), ksh93(1), wait(1), attributes(5) SunOS 5.11 18 Apr 2007 disown(1)