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Full Discussion: Should I be worried about my AIX Cluster?
Operating Systems AIX Should I be worried about my AIX Cluster? Post 302442122 by zaxxon on Tuesday 3rd of August 2010 10:03:08 AM
Old 08-03-2010
Slightly off topic but I am missing something like
Code:
lru_file_repage = ...

in the output of vmo. That could be one reason why you sometimes have I/O to paging space which is not good and will be most probably be noticeable by users.

Your vmstat output:
Code:
 5   1    5614722      40650     0   209     0    25     34     0   928  82948 11189  5 16 78  1

and vmstat -v:
Code:
                80636 paging space I/Os blocked with no psbuf

Show a
Code:
vmo -x

instead please, ty.

---------- Post updated at 04:03 PM ---------- Previous update was at 03:55 PM ----------

For the I/O on disks I guess your rootvg is on hdisk0 and hdisk1 (lspv| grep rootvg)? All the other hdisks are the san disks? If yes, the SAN disks do not seem very busy looking at the iostat. That traffic on rootvg disks should be evaded as it slows down the system. Maybe a filemon can tell more (if it is not just the paging).

I don't have AIX 6 at hand but I read that they now have a basic tuning in the default installation. So I guess that your lru_file_repage is already = 0. The other thing I guess why it is using paging space is simply that is has too few memory.

Maybe you have spare Memory on this Managed System or can use CoD (Capacity on Demand) and check it out how it works with 48 GB instead of 24 GB for some days? I think that would be worth a try.
 

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LEARN ABOUT OPENSOLARIS

sc_zonesd

sc_zonesd(1M)						  System Administration Commands					     sc_zonesd(1M)

NAME

       sc_zonesd - Sun Cluster zone administration daemon

SYNOPSIS

       /usr/cluster/lib/sc/sc_zonesd

DESCRIPTION

       The  sc_zonesd  daemon  is a system daemon that is used by Sun Cluster software to track and manage non-global zones. This daemon initially
       starts when the system comes up.

       The daemon runs in the global zone only.

DIAGNOSTICS

       All diagnostic messages are logged through the syslog function.

NOTES

       The sc_zonesd daemon must be started in superuser mode.

       The sc_zonesd daemon is controlled by the SMF service sc_zones. The cluster software requires this daemon to run for non-global	zone  sup-
       port. If the daemon is killed or if the SMF service is disabled, the cluster node will panic.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Private			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       syslog(3C), attributes(5)

Sun Cluster 3.2 						    19 May 2006 						     sc_zonesd(1M)
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