From: Naylor, Jim (Jnaylor@Schnucks.com)
Date: Thu Jun 27 2002 - 12:43:43 EDT
Thanks to David Totsch for this excellent description and the location of
much more information on measure ware. Original question is at the bottom
Jim Naylor
Unix Systems Administrator
Schnuck Markets, Inc.
314-994-4784
jnaylor@schnucks.com
From: TOTSCH,DAVID (HP-USA,ex3) [mailto:david_totsch@hp.com]
Sent: Tuesday, June 18, 2002 3:57 PM
To: Naylor, Jim
Subject: RE: [HPADM] IPCSubsystem info from extract
Jim:
>From /opt/perf/paperdocs/mwa/C/methp.txt:
GBL_IPC_SUBSYSTEM_QUEUE
--------------------
The average number of processes or kernel threads blocked on the
InterProcess Communication (IPC) subsystems (waiting for their
interprocess communication activity to complete) during the
interval. This is the sum of processes or kernel threads in the
IPC, MSG, SEM, PIPE, SOCKT (that is, sockets) and STRMS (that is,
streams IO) wait states.
This is calculated as the accumulated time that all processes or
kernel threads spent blocked on (IPC + MSG + SEM + PIPE + SOCKT +
STRMS) divided by the interval time.
The Global QUEUE metrics, which are based on block states,
represent the average number of process or kernel thread counts,
not actual queues.
The Global WAIT PCT metrics, which are also based on block
states, represent the percentage of all processes or kernel
threads that were alive on the system.
No direct comparison is reasonable with the Application WAIT PCT
metrics since they represent percentages within the context of a
specific application and cannot be summed or compared with global
values easily. In addition, the sum of each Application WAIT PCT
for all applications will not equal 100% since these values will
vary greatly depending on the number of processes or kernel
threads in each application.
For example, the GBL_DISK_SUBSYSTEM_QUEUE values can be low,
while the APP_DISK_SUBSYSTEM_WAIT_PCT values can be high. In
this case, there are many processes on the system, but there are
only a very small number of processes in the specific application
that is being examined and there is a high percentage of those
few processes that are blocked on the disk I/O subsystem.
-dlt-
> -----Original Message-----
> From: Naylor, Jim [mailto:Jnaylor@Schnucks.com]
> Sent: Tuesday, June 18, 2002 1:29 PM
> To: Hpux-Admin@Dutchworks. Nl (E-mail)
> Subject: [HPADM] IPCSubsystem info from extract
>
>
> Hello All,
> I was wondering if anyone could explain the value from the
> column heading
> "IPCSubsys Queue" that is produced from the extract command I
> am using. I
> assume it has something to do with the Message queues, Semaphores, and
> Shared memory from the ipcs command but I am not sure what
> the value under
> this column is telling me. Also what is an acceptable value
> for this. The
> following is command I am using to extract the data:
>
> extract -g -r /var/opt/perf/reptfile -b today 5:00 AM -e
> today 01:00 PM
>
> Below is a sample of the output:
>
> IPCSubsys Queue
> 22.54
> 23.08
> 23.29
> 23.23
> 22.63
> .
> .
> .
> This is on an N4000 running HP-UX 11.00 - 7 oracle instances
> running on this
> system
>
> Thanks,
> Jim Naylor
> Unix Systems Administrator
> Schnuck Markets, Inc.
> * Direct: (314) 994-4784
> *)) Cell: (314) 691-0186
> * Fax : (314) 994-4684
> * jnaylor@schnucks.com
>
>
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