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Full Discussion: Load average spikes once an hour
Top Forums UNIX for Dummies Questions & Answers Load average spikes once an hour Post 302513773 by Brian294 on Thursday 14th of April 2011 04:42:36 AM
Old 04-14-2011
Same thing on my VPS
I recently signed up for a VPS with CentOS and CPanel/WHM. The exact same thing is happening on mine. Spikes every hour, on the hour. They last about 4 minutes and during that time there is piss poor system performance.

High IO Wait time. Memory levels are fine. No RAM swapping.

I monitored top during these spikes and the process that kept floating to the top was: md5sum

---------- Post updated at 03:42 AM ---------- Previous update was at 03:37 AM ----------

By the way, how do we fix what is going on? I am running "ps -ejH" but not sure what to look for. It is neat looking at the process tree! Sweet command.
 

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LEARN ABOUT OPENSOLARIS

uptime

uptime(1)							   User Commands							 uptime(1)

NAME

       uptime - show how long the system has been up

SYNOPSIS

       uptime

DESCRIPTION

       The uptime command prints the current time, the length of time the system has been up, and the average number of jobs in the run queue over
       the last 1, 5 and 15 minutes. It is, essentially,  the first line of a w(1) command.

EXAMPLES

       Below is an example of the output uptime provides:

	 example% uptime
	 10:47am  up 27 day(s), 50 mins,  1 user,  load average: 0.18, 0.26, 0.20

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------------------------------------+
       |ATTRIBUTE TYPE		      ATTRIBUTE VALUE		   |
       |Availability		      SUNWcsu			   |
       +-----------------------------------------------------------+

SEE ALSO

       w(1), who(1), whodo(1M), attributes(5)

NOTES

       who -b gives the time the system was last booted.

SunOS 5.11							    18 Mar 1994 							 uptime(1)
All times are GMT -4. The time now is 07:55 PM.
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