Not using all CPU's? Post: 302734583

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Operating Systems AIX Not using all CPU's? Post 302734583 by vpundit on Thursday 22nd of November 2012 11:33:40 AM

11-22-2012

Registered User

LPAR is not using all CPU's

Hi guys,

I am a bit confused here,

I have attached the nmon report extracted from one of my systems.

I've never seen something like this. It appears that all the cpu usage is being utilized on one CPU and the others appear to be idle or hardly used. I've seen this in a few systems recently. Now I know that their paging space is not setup correctly. and I'm going though the steps to show them that it needs to be changed. I have attached a simplified nmon log if someone can look at it and tell me if they can see why only one cpu is being utilized would be great as I've not seen this before.

Here is the lparstat

Code:

Partition Number                           : 4
Type                                       : Shared-SMT-4
Mode                                       : Capped
Entitled Capacity                          : 4.00
Partition Group-ID                         : 32772
Shared Pool ID                             : 0
Online Virtual CPUs                        : 40
Maximum Virtual CPUs                       : 60
Minimum Virtual CPUs                       : 1
Online Memory                              : 65536 MB
Maximum Memory                             : 131072 MB
Minimum Memory                             : 4096 MB
Variable Capacity Weight                   : 0
Minimum Capacity                           : 0.10
Maximum Capacity                           : 6.00
Capacity Increment                         : 0.01
Maximum Physical CPUs in system            : 16
Active Physical CPUs in system             : 16
Active CPUs in Pool                        : 16
Shared Physical CPUs in system             : 16
Maximum Capacity of Pool                   : 1600
Entitled Capacity of Pool                  : 1500
Unallocated Capacity                       : 0.00
Physical CPU Percentage                    : 10.00%
Unallocated Weight                         : 0
Memory Mode                                : Dedicated
Total I/O Memory Entitlement               : -
Variable Memory Capacity Weight            : -
Memory Pool ID                             : -
Physical Memory in the Pool                : -
Hypervisor Page Size                       : -
Unallocated Variable Memory Capacity Weight: -
Unallocated I/O Memory entitlement         : -
Memory Group ID of LPAR                    : -
Desired Virtual CPUs                       : 40
Desired Memory                             : 65536 MB
Desired Variable Capacity Weight           : 0
Desired Capacity                           : 4.00
Target Memory Expansion Factor             : -
Target Memory Expansion Size               : -
Power Saving Mode                          : Disabled

During that day here was the nmon uptime:

Code:

    12:04AM   up 2 days, 9 hrs,  0 users,    load average: 39.55, 42.90, 44.14

Last edited by vpundit; 11-23-2012 at 01:38 PM..

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LEARN ABOUT DEBIAN

cpu

CPU(8)							      System Manager's Manual							    CPU(8)

NAME

       cpu - A tool for user and group administration

SYNOPSIS

       cpu [OPTIONS]

DESCRIPTION

       CPU is a tool for user administration, that was initially based on FreeBSD's pw(8). This tool will allow you to administer users and groups
       on several different backends currently including LDAP and flat files. Please see the website http://cpu.sourceforge.net for more  informa-
       tion, or help improve the man page.

OPTIONS

       There are two kinds of options; options for CPU and options for CPU modules.  There are only four options for CPU, they are as follows:

       -C configfile, --config configfile
	      The configuration file to be used by CPU. The options in this file are used for CPU modules.

       -h, --help
	      Display help for CPU. If specified in conjunction with the -m option the help for that particular module is displayed.

       -M method, --method=method
	      This  is	the method of administration. Current options are ldap or passwd (passwd is not yet working). This can be specified in the
	      configuration file.

       -V, --version
	      Display the version of the software.

SEE ALSO

       cpu.conf(5) cpu-ldap(8)

AUTHORS

       Blake Matheny <bmatheny@purdue.edu>

       The current version of this software is always availabe at http://cpu.sourceforge.net

BUGS

       To report a bug or problem, please e-mail:

       cpu-users@lists.sourceforge.net

TODO

       See TODO file that accompanied software. Please e-mail us with any additional suggestions.

								 17 February 2003							    CPU(8)

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