On 2/20/06, Bob Rogers <[EMAIL PROTECTED]> wrote: > From: Ranga Nathan <[EMAIL PROTECTED]> [...] > On the other hand, doing "nice -n-1 <myscript> &" would run it at a > slightly higher-than-default priority, which might allow it to swap in > more quickly when the workload picked up. This would work best if the > actions were fairly lightweight, as <myscript> will hog the CPU while > it's running. (I Haven't tried this recipe myself, though.)
The problem with a script swapping out is that it takes I/0 to swap it back in. Changing the priority just gives it better access to the CPU, which doesn't help one bit in how quickly I/O lets it get swapped back in. There many two solutions for getting swapped back out. The best is to add RAM. Secondly you can regularly guarantee that the script wakes up regularly and does something. Third, if you're using Linux 2.6 or later, play around with the swappiness parameter. You can control this either by echo 60 > /proc/sys/vm/swappiness or by adding vm.swappiness =60 to /etc/sysctl.conf. Cheers, Ben _______________________________________________ Boston-pm mailing list [email protected] http://mail.pm.org/mailman/listinfo/boston-pm
