Re: 15000+ processes -- poor performance ?!

William Lee Irwin III
2002-12-19T01:19:27Z

On Wed, Dec 18, 2002 at 05:12:41PM -0800, David Lang wrote:
> also top is very inefficant with large numbers of processes. use vmstat
> or cat out the files in /proc to get the info more efficiantly (it won't
> get you per process info, but it son't cause the interferance with your
> desired load that top gives you.)

It's mostly just the fact top(1) doesn't scan /proc/ incrementally and
that proc_pid_readdir() is quadratic in the number of tasks.

Bill