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Full Discussion: AIX 7.1 high page faults
Operating Systems AIX AIX 7.1 high page faults Post 302723971 by gullio23 on Wednesday 31st of October 2012 05:05:36 AM
Old 10-31-2012
AIX 7.1 high page faults

hi guys i hope you can help me with this situation.

i have 2 lpar with aix 7.1 and oracle 11gr2 in grid mode.

when i start nmon to check the current system health i notice that page fault are over 3000/s. than i have opened a case with ibm and they say that the problem is not paging nor pinning nor memory but heavy i/o on disks from an application.

infact i have 30% of free memory and 0.3% of page space used and 16,7& of pinned memory.

now i thinks oracle arc is the cause, but how can determine exactly which application is creating those page faults?

i have tried with noon with t option and then 5(for i/o) but it seems all normally.

any suggest would be appreciated.
Thanks
 

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NMON(1) 							   User Commands							   NMON(1)

NAME
nmon - systems administrator, tuner, benchmark tool. DESCRIPTION
This manual page documents briefly the nmon command. This manual page was written for the Debian distribution because the original program does not have a manual page. nmon is is a systems administrator, tuner, benchmark tool. It can display the CPU, memory, network, disks (mini graphs or numbers), file systems, NFS, top processes, resources (Linux version & processors) and on Power micro-partition information. OPTIONS
nmon follow the usual GNU command line syntax, with long options starting with two dashes (`-'). nmon [-h] [-s <seconds>] [-c <count>] [-f -d <disks> -t -r <name>] [-x] A summary of options is included below. -h FULL help information Interactive-Mode: read startup banner and type: "h" once it is running For Data-Collect-Mode (-f) -f spreadsheet output format [note: default -s300 -c288] optional -s <seconds> between refreshing the screen [default 2] -c <number> of refreshes [default millions] -d <disks> to increase the number of disks [default 256] -t spreadsheet includes top processes -x capacity planning (15 min for 1 day = -fdt -s 900 -c 96) AUTHOR
nmon was written by Nigel Griffiths <nag@uk.ibm.com> This manual page was written by Giuseppe Iuculano <giuseppe@iuculano.it>, for the Debian project (but may be used by others). nmon August 2009 NMON(1)
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