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Load averages - what are they?
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Professional Poster
Join Date: Oct 2000
Location: France
Status:
Offline
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here's my uptime:
3:07PM up 3 days, 3:03, 2 users, load averages: 0.42, 0.42, 0.46
Are they high/low load averages? What do they measure?
W.
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Mac Elite
Join Date: May 2001
Location: ~/
Status:
Offline
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The first is the load average of the 5, 30, and 60 seconds. The load average is the number of jobs waiting in the job queue. Numbers below 5 are not all that bad on a workstation when you're running a bunch of active processes. Usually though you're going to see averages below 1.
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Dedicated MacNNer
Join Date: Oct 1999
Location: UK
Status:
Offline
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Originally posted by Graymalkin:
The first is the load average of the 5, 30, and 60 seconds. The load average is the number of jobs waiting in the job queue. Numbers below 5 are not all that bad on a workstation when you're running a bunch of active processes. Usually though you're going to see averages below 1.
No, they are over the last 1, 5, and 15minutes.
NAME
uptime - show how long system has been running
SYNOPSIS
uptime
DESCRIPTION
The uptime utility displays the current time, the length of time the sys-
tem has been up, the number of users, and the load average of the system
over the last 1, 5, and 15 minutes.
FILES
/mach system name list
SEE ALSO
w(1)
HISTORY
The uptime command appeared in 3.0BSD.
3rd Berkeley Distribution April 18, 1994 3rd Berkeley Distribution
AJ
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Mac Elite
Join Date: Jul 2002
Location: Youngsville, NC
Status:
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I asked the same question on another forum, and a nice fellow handed me this link.
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Junior Member
Join Date: Nov 2002
Location: Peotone, IL
Status:
Offline
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System @ idle. Finder, Chimera, AIM, itunes on pause. System load 45% i dont think that is rite.
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Senior User
Join Date: Jul 2002
Location: Arizona Wasteland
Status:
Offline
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Originally posted by Deadline:
System @ idle. Finder, Chimera, AIM, itunes on pause. System load 45% i dont think that is rite.
Your assuming all those applications are written correctly to use very little CPU when they are in their idle loop.
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Dedicated MacNNer
Join Date: Nov 2002
Location: Hobart, Tasmania, Australia
Status:
Offline
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Originally posted by Deadline:
System @ idle. Finder, Chimera, AIM, itunes on pause. System load 45% i dont think that is rite.
no no no.
the load has nothing to do with percentages.
it's a number showing how many jobs that are in the run queue of the operating system.
on a desktop machine running a window environement (in this case Aqua) 0.2 to 0.4 while idle is pretty average.
with stuff like VPC or DVD playback expect 1.5 - 2 loads.
I've seen servers that are taking a pummeling of corrupt TCP packets at 100 mbit/sec running at a load of 900 plus it took 3 minuites to login via ssh but was still responding. 
of course the higher the number the more work the system is doing.
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