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Full Discussion: Help with prstat
Top Forums UNIX for Dummies Questions & Answers Help with prstat Post 67284 by izy100 on Tuesday 22nd of March 2005 08:16:43 AM
Old 03-22-2005
=)
It is the same as the load average when you run a 'uptime'

Do a man page on uptime:
'run queue over the last 1, 5 and 15 minutes.'

Performance is subjective...
You talking about throughout or latency or response time or bottleneck or etc..... They are all performance..

If you are looking for a magic number, I supposed for UltraSPARC II, Adrian cockroft from SUN mentioned preferably less than 4~5 runnable jobs per CPUs, (So you see, it depends on the quality and quantity of CPUs you have)
to avoid spending too much time in context-switching.
This load average is the same as the 'r' you get from vmstat. Some people call this CPU queue length.

If you are asking about this to solve a performance problem, you need a baseline to compare.

E.g.
I have a Oracle DataMart and Warehouse of 6 CPUs (UltraSPARC III), often hover around 40 jobs. No user complain.
I also have another performance sensitive Oracle OLTP DB with 6 CPUs (UltraSPARC III). Once the queue hits 20, user complain.
 

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LEARN ABOUT HPUX

ruptime

ruptime(1)						      General Commands Manual							ruptime(1)

NAME

       ruptime - show status of local machines

SYNOPSIS

DESCRIPTION

       outputs	a  status  line  for each machine on the local network that is running the daemon.  status lines are formed from packets broadcast
       once every 3 minutes between daemons (see rwhod(1M)) on each host on the network.  Each status line  has  a  field  for	the  name  of  the
       machine, the status of the machine (up or down), how long the machine has been up or down, the number of users logged into the machine, and
       the 1-, 5- and 15-minute load averages for the machine when the packet was sent.

       The status of the machine is reported as ``up'' unless no report has been received from the machine for 11 minutes or more.

       The length of time that the machine has been up is shown as:

       Load averages are the average number of jobs in the run queue over the last 1-, 5- and 15-minute intervals when the packet was sent.

       An example status line output by might be:

       The above status line would be interpreted as follows:

       is presently ``up'' and has been up for 1 day, 5 hours and 15 minutes.  It currently has 7 users logged in.  Over the last 1-minute  inter-
       val,  an average of 1.47 jobs were in the run queue.  Over the last 5-minute interval, an average of 1.16 jobs were in the run queue.  Over
       the last 15-minute interval, an average of 0.80 jobs were in the run queue.

       If a user has not used the system for an hour or more, the user is considered idle.  Idle users are not shown unless the option	is  speci-
       fied.

   Options
       If no options are specified, the listing is sorted by host name.  Options change sorting order as follows:

	      Sort by load average.

	      Sort by up time.

	      Sort by the number of users.

	      Reverse the sort order.

DIAGNOSTICS

       No status report files in
	    Ask the system administrator to check whether the daemon is running.

AUTHOR

       was developed by the University of California, Berkeley.

FILES

       Data files

SEE ALSO

       rwho(1), rwhod(1M).

																	ruptime(1)
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