If you are running on unix, the easiest way to probably do this is by calling the "setpriority" from within your perl script like this:
setpriority(WHICH,WHO,PRIORITY);
To set your current running perlscript to the lowest priority, you would call setpriority(0, $$, 20);
$$ is your script's process ID, and "20" denotes the priority. (as you know, -20 is highest priority and 20 the lowest priority).
Cheers,
R.
----- Original Message ----
From: Audio Phile <da_audiophile@xxxxxxxxx>
To: users@xxxxxxxxxxxxxxxx
Sent: Wednesday, August 27, 2008 2:18:53 PM
Subject: Re: lower cpu priority to perl scripts
Tamer,
Thank you very much for the reply. I googled around for the proper syntax of your suggestion as well as which config file I need to edit with it, but I came up with a big fat 0. Can you provide a few more details for me? Apologies in advance, I am a newbie with apache2 :)
Tamer Embaby wrote:
Audio,
You can always start your scripts with [re]nice() syscall to lower
your process (perl script in this case) priority.
Regards,
Tamer
-----Original Message-----
From: Audio Phile [mailto:da_audiophile@xxxxxxxxx]
Sent: Tuesday, August 26, 2008 8:57 PM
To: users@xxxxxxxxxxxxxxxx
Subject: lower cpu priority to perl scripts
I'd like to adjust the priority of /usr/bin/perl such that it will always run with very low priority. The PC that I'm using isn't very powerful. I'm running rrdweather on it and when a user hits the weather.cgi about 10 processes of perl scripts run,
which totally throttles foreground applications until they finish.
How can I assign /usr/bin/perl to always run with a really low CPU priority (a really high nice value) for any script it executes? Is this an apache2 setting or...?
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