interpreting uptime output
cswiger at mac.com
Thu Mar 29 18:07:42 UTC 2007
On Mar 29, 2007, at 11:00 AM, Laszlo Nagy wrote:
[ ...about the "uptime" command... ]
> This is great, except that it does not tell me what "0.5" means?
> 1:41PM up 5 days, 2:22, 4 users, load averages: 0.36, 0.42, 0.51
> The only referenced material in the man page is w(1) which tells this:
> > The load average numbers give the number of jobs in the run queue
> averaged over 1, 5 and 15 minutes.
> What are those "jobs"? I guess they are not processes. What is that
> "run queue"? Which is better, the lower or the higher number?
A job is a runnable process. The run queue is a list containing the
processes which are runnable at a particular time. Lower numbers
indicate lower CPU load. From "man getloadavg":
> The getloadavg() function returns the number of processes in
> the system
> run queue averaged over various periods of time. Up to nelem
> samples are
> retrieved and assigned to successive elements of loadavg.
> The system
> imposes a maximum of 3 samples, representing averages over the
> last 1, 5,
> and 15 minutes, respectively.
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