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Full Discussion: Vmstat fault section all values are 0
Operating Systems AIX Vmstat fault section all values are 0 Post 302770317 by zaxxon on Friday 15th of February 2013 07:26:49 AM
Old 02-15-2013
High PIDs on up-to-date AIX systems are ok. I remember it was a problem (or could have been) on AIX 4.3.3? 5.2?, but it's too long ago to say for sure, sorry.

I have not yet seen so many zeros in vmstat output. Must not mean much but looks strange for me.

The <defunct> processes are really not a good sign. They are zombies, failures of the program.
You say that you have so many processes so that the maximum number of processes per user is hit. How do you know this?
Do you have your box tuned with the recommendations for Oracle like setting at least maxuproc=4096. If it is on the default value, it will be too low most probably. That could be related to the Oracle error messages you get.
Here is a discussion about it:
https://forums.oracle.com/forums/thr...sageID=3445541

But you also find it in setup/tuning recommendations for Oracle on AIX.

Beside all that you should also have a look at the entries in the Error Report of AIX (errpt).
Last edited by zaxxon; 02-15-2013 at 09:06 AM.. Reason: phrasing
 

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LEARN ABOUT CENTOS

pmdamemcache

PMDAMEMCACHE(1) 					       Performance Co-Pilot						   PMDAMEMCACHE(1)

NAME

       pmdamemcache - memcache performance metrics domain agent (PMDA)

DESCRIPTION

       This PMDA extracts performance data from memcached, a distributed memory caching daemon commonly used to improve web serving performance.
       A farm of memcached processes over multiple servers can be utilised by a single web application, increasing the total available object
       cache size, and decreasing the database load associated with smaller cache sizes.  This system is described in detail at
       http://www.danga.com/memcached.

INSTALLATION

       Configure pmdamemcache to extract the values from set of hosts used in the memcache farm.  These hosts can be listed in the
       $PCP_PMDAS_DIR/memcache/memcache.conf file, in the format (i.e.	Perl array) described at the top of pmdamemcache.pl.  A custom refresh
       rate can also be configured using this mechanism.

	       # cd $PCP_PMDAS_DIR/memcache
	       # [ edit memcache.conf ]

       Once this is setup, you can access the names and values for the memcache performance metrics by doing the following as root:

	       # cd $PCP_PMDAS_DIR/memcache
	       # ./Install

       If you want to undo the installation, do the following as root:

	       # cd $PCP_PMDAS_DIR/memcache
	       # ./Remove

       pmdamemcache is launched by pmcd(1) and should never be executed directly.  The Install and Remove scripts notify pmcd(1) when the agent is
       installed or removed.

FILES

       $PCP_PMDAS_DIR/memcache/memcache.conf
	   configuration file listing monitored memcache instances

       $PCP_PMDAS_DIR/memcache/Install
	   installation script for the pmdamemcache agent

       $PCP_PMDAS_DIR/memcache/Remove
	   undo installation script for the pmdamemcache agent

       $PCP_LOG_DIR/pmcd/memcache.log
	   default log file for error messages from pmdamemcache

SEE ALSO

       pmcd(1) and memcached(1).

3.8.10							       Performance Co-Pilot						   PMDAMEMCACHE(1)
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