[HPADM] 8420 VPARs running with High load on CPU0 and low load on all other CPUS
From: James J. Perry (jjperry_at_water.com)
Date: 03/18/05
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Date: Fri, 18 Mar 2005 14:50:48 -0500 To: <hpux-admin@dutchworks.nl>
I have an 8420 with 2 npars. Each npar has 2 vpars.
What I have noticed once I put Oracle Apps on one of the vpars (2 CPU,
16 GB ram), is that CPU 0 has a load of 20 and CPU 1 has a load of 0-5.
CPU Utilization is evenly distributed over both CPUs. I have noted the
same behavior on most of the active vpars in use. Here are "sar -u -M
5 5" and "sar -q -M 5 5" from one of the vpars.
sar -u -M 5 5
13:55:22 cpu %usr %sys %wio %idle
13:55:27 0 41 7 0 51
1 45 6 1 49
system 43 6 1 50
13:55:32 0 46 4 3 47
1 37 13 1 49
system 42 9 2 48
13:55:37 0 46 8 0 46
1 53 13 0 34
system 50 10 0 40
13:55:42 0 45 4 1 51
1 39 12 0 49
system 42 8 0 50
13:55:47 0 21 6 2 72
1 30 5 1 64
system 25 6 1 68
Average 0 40 6 1 53
Average 1 41 10 1 49
Average system 40 8 1 51
sar -q -M 5 5
14:44:50 cpu runq-sz %runocc swpq-sz %swpocc
14:44:55 0 8.8 100
1 0.0 0
system 8.8 50 0.0 0
14:45:00 0 4.0 40
1 3.2 80
system 3.5 60 0.0 0
14:45:05 0 31.0 20
1 5.7 60
system 12.0 40 0.0 0
14:45:10 0 8.0 100
1 3.5 40
system 6.7 70 0.0 0
14:45:15 0 3.7 60
1 4.6 100
system 4.2 80 0.0 0
Average 0 8.4 64
Average 1 4.3 56
Average system 6.5 60 0.0 0
This is also see in Top and Glance.
Glance
************************************************************************
********
CPU BY PROCESSOR
Users= 4
CPU State Util LoadAvg(1/5/15 min) CSwitch Last Pid
------------------------------------------------------------------------
--------
0 Enable 60.8 18.4/ 18.2/ 18.8 2592 13070
1 Enable 60.8 3.0/ 2.8/ 3.1 3348 12726
Top
************************************************************************
********
Load averages: 10.35, 10.46, 10.90
429 processes: 389 sleeping, 39 running, 1 zombie
Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 17.75 31.7% 0.0% 0.0% 68.3% 0.0% 0.0% 0.0% 0.0%
1 2.96 47.5% 0.0% 0.0% 52.5% 0.0% 0.0% 0.0% 0.0%
--- ---- ----- ----- ----- ----- ----- ----- ----- -----
avg 10.35 39.6% 0.0% 0.0% 60.4% 0.0% 0.0% 0.0% 0.0%
This is really uncharacteristic for any Unix server I have administered.
I see the CPU utilization about even most of the time, but the CPU 0 has
a very high run queue. No users are complaining and it seems that all
of the processes are getting run in a reasonable amount of time. Has
anyone seen this type of behavior before? Is it related to running in a
VPAR?
Thanks
-Jim
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