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Old 07-15-2004, 08:20 AM   #1
Registered: Oct 2003
Location: MN
Distribution: CentOS, Fedora
Posts: 182

Rep: Reputation: 30
Making process priority "stick"?

Hey all,

Per some recommendations on the mysql site about optimizing for a dual processor system, I'm trying to set the nice value of the mysqld_safe process. Since this box is used only for MySQL, I'm trying to set the nice value to -20, as it's supposed to give a fairly hefty performance increase. However, I'm having some issues trying to get the value to stick. I can run that command from a terminal window just fine, and it sets the value as it should. However, as soon as I close the window or session, the value resets to 0 again.

The exact wording that they used was this:

This can be done by adding a renice -20 $$ command to mysqld_safe.
The mysqld_safe is a shell script, but they give no advice on where to add this command. I put it in at the start and at the end of the script, but it didn't appear to make any difference.

So, I guess I'm hoping there's a way to set the process priority in such a way that it will stick. If anyone has any suggestions, I'd appreciate them.

Old 07-15-2004, 08:33 AM   #2
Registered: Aug 2003
Location: Portland, Oregon
Distribution: RedHat, Libranet
Posts: 438

Rep: Reputation: 30
Try invoking disown before closing the terminal session.

This command will allow you to close a shell without killing all the child processes. Information about disown can be found in the bash man page.


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