01-09-2003
Backgrounding process with higher priority
I have been troubleshooting a mysterious performance problem with the nightly batch programs on our primary system for quite some time and just found something very interesting. All batch processes are running with a nice value of 24. I don't know what the default is on other systems but I do know that on HP-UX the default is 20.
I then did some investigating to find out that all processes that run in the background with an "&" automatically run with an offset of (+)4. And this coincides with the problems we've been seeing that when users start logging on in the morning the batch times increase significantly.
Does anyone have any suggestions on how to fix this? Is there a default setting I can change for this. We actually want the batch to finish as quickly as possible and if anything should be running with an offset of -4.
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qmove(1B) PBS qmove(1B)
NAME
qmove - move pbs batch job
SYNOPSIS
qmove destination job_identifier ...
DESCRIPTION
To move a job is to remove the job from the queue in which it resides and instantiate the job in another queue. The qmove command issues a
Move Job batch request to the batch server that currently owns each job specified by job_identifier.
A job in the Running , Transiting , or Exiting state cannot be moved.
OPERANDS
The first operand is the new destinationfor
queue
@server
queue@server
See the PBS ERS section , "Destination Identifiers".
If the destination operand describes only a queue, then qmove will move jobs into the queue of the specified name at the job's current
server.
If the destination operand describes only a batch server, then qmove will move jobs into the default queue at that batch server.
If the destination operand describes both a queue and a batch server, then qmove will move the jobs into the specified queue at the speci-
fied server.
All following operands are job_identifiers which specify the jobs to be moved to the new destination. The qmove command accepts one or
more job_identifier operands of the form:
sequence_number[.server_name][@server]
STANDARD ERROR
The qmove command will write a diagnostic messages to standard error for each error occurrence.
EXIT STATUS
Upon successful processing of all the operands presented to the qmove command, the exit status will be a value of zero.
If the qmove command fails to process any operand, the command exits with a value greater than zero.
SEE ALSO
qsub(1B), pbs_movejob(3B)
Local qmove(1B)