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From david <da...@daku.org>
Subject Re: [users@httpd] lower cpu priority to perl scripts
Date Wed, 27 Aug 2008 22:31:15 GMT
Audio Phile:

Do you have a comparable example for ActiveState Perl on Windows?


At 03:12 PM 8/27/2008, you wrote:
>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@yahoo.com>
>To: users@httpd.apache.org
>Sent: Wednesday, August 27, 2008 2:18:53 PM
>Subject: Re: [users@httpd] 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@yahoo.com]
>Sent: Tuesday, August 26, 2008 8:57 PM
>To: users@httpd.apache.org
>Subject: [users@httpd] 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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