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Top Forums UNIX for Beginners Questions & Answers Answers to Frequently Asked Questions Tips and Tutorials The Most Incomplete Guide to Performance Tuning Post 302853705 by jlliagre on Sunday 15th of September 2013 09:40:04 PM
Old 09-15-2013
Just a small comment. Beware that depending on the operating system used there are (rare) cases where monitoring commands display slightly different metrics under the same label so might lead to incorrect interpretation.

In particular, what you wrote about the pi/po columns do not apply at least to Solaris vmstat with which the paging activity account disk read and writes due to normal virtual memory I/O like regular mmaped files being accessed.

On Solaris, what AIX reports as pi/po is shown under the api/apo (anonymous pages in/out) columns when the '-p' option is passed to vmstat.
 

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PMWHICHCONTEXT(3)					     Library Functions Manual						 PMWHICHCONTEXT(3)

NAME
pmWhichContext - identify the current PMAPI context C SYNOPSIS
#include <pcp/pmapi.h> int pmWhichContext(void); cc ... -lpcp DESCRIPTION
An application using the Performance Metrics Application Programming Interface (PMAPI) may manipulate several concurrent contexts, each associated with a source of performance metrics, e.g. pmcd(1) on some host, or an archive log of performance metrics as created by pmlog- ger(1). pmWhichContext returns a handle for the current PMAPI context, that may be used in the associated PMAPI routines that require a handle to identify a PMAPI context. SEE ALSO
PMAPI(3), pmDestroyContext(3), pmDupContext(3), pmNewContext(3) and pmUseContext(3). DIAGNOSTICS
PM_ERR_NOCONTEXT no current context Performance Co-Pilot PCP PMWHICHCONTEXT(3)
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