If the load average is low and the CPU's are pegged... you are NOT I/O bound, but rather processor bound. If the opposite were true, that the procs were idle but the load was high, then you would need to look at your I/O to see what is causing things to wait. - Herman Ken Schneider wrote:
On Mon, 2003-03-31 at 07:42, James Ogley wrote:
Hi,
One of our internal DB servers is currently showing each CPU as 0% idle in top, but it's still responsive, and the system load is still nice and low. It's been like this for a few hours now, and it's causing us a little concern.
We're wondering whether it might be I/O bound, but we're reluctant to install sysstat on it, because of the masses of dependencies that would need to be fulfilled (this after all is a server tucked away in a comms room, so it doesn't have X or anything on it...).
Anyone have any suggestions of other tools we could use to determine whether it might be I/O bound or not?
Cheers
James -- James Ogley, Unix Systems Administrator, Pinnacle Insurance Plc Work: james.ogley@pinnacle.co.uk www.pinnacle.co.uk +44 (0) 20 8731 3619 Personal: james@rubberturnip.org.uk www.rubberturnip.org.uk Updated GNOME RPMs for SuSE Linux: www.usr-local-bin.org
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top and sar come to mind.
Ken