Re: [SLUG] disk throughput vs cron

From: Rich Morgan (rmorgan@heavysystems.com)
Date: Thu Nov 02 2006 - 12:28:52 EST


> I run a disk-to-disk copy every morning at 5am, invoked by cron. Every
> now
> and then, I see a drop in throughput (today it was from ~45 MB/s to ~34
> MB/s, from 5:01:30 to 5:08:30). How can I find out what's running at this
> time and slowing down the copy? I already found the stuff in
> /etc/crontab,
> and I moved that from 6:xx to 7:xx. I checked crontabs for root and eben
> (news has none), nothing about that time.

Deja vu. Wasn't this topic discussed earlier?

Anyway, you could set a cron job to do a ps aux > pre_dd_process_list.txt
before you do your dd to capture a snapshot of what's running and the CPU
utilization... just a thought.

v/r,
Rich Morgan
OpenAddict.com

-----------------------------------------------------------------------
This list is provided as an unmoderated internet service by Networked
Knowledge Systems (NKS). Views and opinions expressed in messages
posted are those of the author and do not necessarily reflect the
official policy or position of NKS or any of its employees.



This archive was generated by hypermail 2.1.3 : Fri Aug 01 2014 - 18:59:01 EDT