CPU performance Post: 302988604

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Operating Systems AIX CPU performance Post 302988604 by bakunin on Thursday 29th of December 2016 10:44:59 AM

12-29-2016

Registered User

You have no CPU shortage at all, but the server is heavily misconfigured: it is one small step away from swapping to death. The high numbers in "fr" and "sr" are signs that memory is on the brink of being exhausted and the system is already scanning frantically for places which can be swapped out in case. The chock full blocked-queue and the wait% in the CPU section come from the system having to wait for I/O. This would be OK if the presented snapshot is from a backup cycle (where only I/O counts and the system is normally bound by that) but if this is the usual state of affairs the system would greatly profit from more I/O-capacity (like a better network connection, faster disks, etc. - where exactly the bottleneck in I/O is doesn't show up in the picture).

I don't know for sure but if this is an Oracle system you most probably have the SGA configured too big. Reduce it in size (or add memory, with the same effect) and add I/O capacity and you probably can take away ~3-4 processors without the performance being altered at all, perhaps even better.

You might want to read the Performance Tuning Introduction i wrote for an in-depth explanation of what is going on in your system.

I hope this helps.

bakunin

Last edited by bakunin; 12-29-2016 at 11:53 AM..

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weatherrc

weatherrc(5)							File Formats Manual						      weatherrc(5)

NAME

       weatherrc - configuration file format for the weather(1) utility

DESCRIPTION

       The  weatherrc  file  format is intended to specify a set of aliases by which to group URIs for METAR station conditions and alert/forecast
       zones, but other command-line options and flags for the weather utility can be specified as well.  The file is organized as  an	INI-format
       config,	with  the  alias name in [] brackets and the associated parameter/value pairs on following lines.  Parameters and their values are
       separated by = or : characters.	Multi-word values do not need quoting.	These parameters are supported...

       alert  include local alert notices (possible values are False and True or 0 and 1)

       atypes list of alert notification types to display (ex: tornado_warning,urgent_weather_message)

       cache  control all caching (possible values are False and True or 0 and 1)

       cache_data
	      control retrieved data caching (possible values are False and True or 0 and 1)

       cache_search
	      control search result caching (possible values are False and True or 0 and 1)

       cacheage
	      duration in seconds to refresh cached data (ex: 900)

       cachedir
	      directory for storing cached searches and data (ex: ~/.weather)

       conditions
	      output current conditions (possible values are False and True or 0 and 1)

       defargs
	      list of default command-line arguments (ex: avl,rdu)

       forecast
	      include a local forecast (possible values are False and True or 0 and 1)

       headers
	      list of conditions headers to display (ex: temperature,wind)

       imperial
	      filter/convert conditions for US/UK units (possible values are False and True or 0 and 1)

       metric filter/convert conditions for metric units (possible values are False and True or 0 and 1)

       quiet  skip preambles and don't indent (possible values are False and True or 0 and 1)

       setpath
	      directory search path for correlation sets (ex: .:~/.weather)

       verbose
	      show full decoded feeds (possible values are False and True or 0 and 1)

EXAMPLES

       The following is an example ~/.weather/weatherrc defining a couple aliases named home and work to be displayed  when  running  the  utility
       with no aliases specified...

[default]
defargs = home,work

[home]
description = Conditions and Forecast at Home
forecast = True
metar = http://weather.noaa.gov/pub/data/observations/metar/decoded/KRDU.TXT
zone_forecast = http://weather.noaa.gov/pub/data/forecasts/zone/nc/ncz041.txt

[work]
description = Conditions at Work
metar = http://weather.noaa.gov/pub/data/observations/metar/decoded/KGSO.TXT

       Now if weather is invoked by itself on the command line, it will output conditions for home and work, and also a forecast for home only.

AUTHOR

       Specification and manual written by Jeremy Stanley <fungi@yuggoth.org>.

SEE ALSO

       weather(1)

2.0								    2012-06-24							      weatherrc(5)