topic Re: Memory statistics in Operating System - HP-UX

Memory statistics

Janet White — Tue, 07 Mar 2006 10:36:17 GMT

Hi,

Someone looking for memory stats which I don't know how to get :). Memory cache faults per second, commit limit; committed bytes in use, need this for load testing of new app. I only have MW/Glance besides basic unix (vmstat sar etc). Thank you for your time.

Janet

Re: Memory statistics

Arunvijai_4 — Tue, 07 Mar 2006 10:40:58 GMT

Hi Janet,

May be this thread help you,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=963479

-Arun

Re: Memory statistics

Janet White — Tue, 07 Mar 2006 10:46:52 GMT

Thanks! Feel foolish, didn't search for RAM only memory.

Re: Memory statistics

Geoff Wild — Tue, 07 Mar 2006 10:53:35 GMT

With MW extract, you can create nightly reports like so:

# performance
55 23 * * 1-5 /opt/perf/bin/extract -xp -r /home/gwild/zgbltemplate -g -b today 7:00 -e today 18:00 -f stdout | /bin/mailx -s 'svr003 performance report' sysadm >/dev/null 2>&1

# cat /home/gwild/zgbltemplate
REPORT "MWA Export on !SYSTEM_ID"
FORMAT ASCII
HEADINGS ON
SEPARATOR="|"
SUMMARY=60
MISSING=0
DATA TYPE GLOBAL
YEAR
DATE
TIME
GBL_CPU_TOTAL_UTIL
GBL_CPU_SYS_MODE_UTIL
GBL_CPU_USER_MODE_UTIL
GBL_CPU_SYSCALL_UTIL
GBL_CPU_INTERRUPT_UTIL
GBL_PRI_QUEUE
GBL_CPU_CSWITCH_UTIL
GBL_SWAP_SPACE_UTIL
GBL_DISK_UTIL_PEAK
GBL_DISK_SUBSYSTEM_QUEUE
GBL_MEM_UTIL
GBL_MEM_CACHE_HIT_PCT
GBL_MEM_PAGEOUT_RATE
GBL_MEM_SWAPOUT_RATE
GBL_MEM_QUEUE
GBL_NET_PACKET_RATE
GBL_NET_OUTQUEUE
GBL_NETWORK_SUBSYSTEM_QUEUE

add/remove what you like to the template file...

Rgds...Geoff

Re: Memory statistics

Janet White — Tue, 07 Mar 2006 11:06:58 GMT

thank you. I don't understand the equivelant metric that will give me memory commit limit, I have never heard of that has anyone?

Re: Memory statistics

Geoff Wild — Tue, 07 Mar 2006 11:32:09 GMT

Yeah, I couldn't find memory commit either in this:

http://ovweb.external.hp.com/ovnsmdps/pdf/pa_metrics.pdf

Rgds...Geoff

Re: Memory statistics

James A. Donovan — Tue, 07 Mar 2006 13:21:54 GMT

Sounds like whoever wants this information is used to dealing with Windows systems. "Commit limit", "Committed Bytes" and "Cache faults/sec" are all Windows performance counters.

Commit Limit:
Commit Limit is the amount of virtual memory that can be committed without having to extend the paging file(s). It is measured in bytes. Committed memory is the physical memory which has space reserved on the disk paging files. There can be one paging file on each logical drive). If the paging file(s) are be expanded, this limit increases accordingly. This counter displays the last observed value only; it is not an average.

The rough counterpart in HP-UX is probably the amount of swap space available on the system.

Committed Bytes:
Committed Bytes is the amount of committed virtual memory, in bytes. Committed memory is the physical memory which has space reserved on the disk paging file(s). There can be one or more paging files on each physical drive. This counter displays the last observed value only; it is not an average.

Again, roughly the amount of used/reserved swap.

Cache Faults/Sec:
Cache Faults/sec is the rate at which faults occur when a page sought in the file system cache is not found and must be retrieved from elsewhere in memory (a soft fault) or from disk (a hard fault). The file system cache is an area of physical memory that stores recently used pages of data for applications. Cache activity is a reliable indicator of most application I/O operations. This counter shows the number of faults, without regard for the number of pages faulted in each operation.

Re: Memory statistics

Janet White — Tue, 07 Mar 2006 13:35:58 GMT

EXACTLY WHAT I NEEDED!!! Thank you!

Re: Memory statistics

Janet White — Tue, 07 Mar 2006 13:37:44 GMT

answer supplied by Jim