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Full Discussion: CPU utilization: sar vs ps
Top Forums UNIX for Dummies Questions & Answers CPU utilization: sar vs ps Post 302227542 by sevpert on Thursday 21st of August 2008 11:24:48 AM
Old 08-21-2008
Question CPU utilization: sar vs ps
Any reason why the "sum of all" average cpu utilization numbers collected from ps during any given time sample are "consistently" lower than the corresponding numbers reported by sar (%usr, %sys). We have a Solaris O/S 2.8.

We have been trying to correlate the CPU numbers from the sar, to the processes reported by the ps for the same sampling periods, especially during periods of heavy usage. sar is set up to run every 5 seconds. We have tried to run ps every 5 seconds, and also every second, using the following script:

========================================
#!/bin/sh
while true
do
date
ps -eo pcpu,time,etime,pid,args
sleep 5
done
========================================

Either way, if we add up the "pcpu" numbers for all the reported processes for a given sample, we are as much as 30-40% short of the sar numbers for the same period, very consistently. I thought the ps pcpu numbers would reflect %usr+%sys for each process. What am I missing?

Thanks for any suggestions...
 

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LEARN ABOUT DEBIAN

mdbfontencoding

mdbFontEncoding(5)						 The m17n Library						mdbFontEncoding(5)

NAME

       mdbFontEncoding - Font Encoding

DESCRIPTION

       The m17n library loads information about the encoding of each font form the m17n database by the tags <font, encoding>. The data is loaded
       as a plist of this format.

       FONT-ENCODING ::= PER-FONT *

       PER-FONT ::= '(' FONT-SPEC ENCODING [ REPERTORY ] ')'

       FONT-SPEC ::=
	   '(' [ FOUNDRY FAMILY
	      [ WEIGHT [ STYLE [ STRETCH [ ADSTYLE ]]]]]
	    REGISTRY ')'

       ENCODING ::= SYMBOL

       FONT-SPEC is to specify properties of a font. FOUNDRY to REGISTRY are symbols corresponding to Mfoundry to Mregistry property of a font.
       See m17nFont for the meaning of each property.

       For instance, this FONT-SPEC:

	   (nil alice0 lao iso8859-1)

       should be applied to all fonts whose family name is 'alice0 lao', and registry is 'iso8859-1'.

       ENCODING is a symbol representing a charset. A font matching FONT-SPEC supports all characters of the charset, and a character code is
       mapped to the corresponding glyph code of the font by this charset.

       REPERTORY is a symbol representing a charset or 'nil'. Omitting it is the same as specifying ENCODING as REPERTORY. If it is not 'nil', the
       charset specifies the repertory of the font, i.e, which character it supports. Otherwise, whether a specific character is supported by the
       font or not is asked to each font driver.

       For so called Unicode fonts (registry is 'iso10646-1'), it is recommended to specify 'nil' as REPERTORY because such fonts usually supports
       only a subset of Unicode characters.

COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 						mdbFontEncoding(5)
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