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Full Discussion: AIX performance issue
Operating Systems AIX AIX performance issue Post 302461190 by zxmaus on Friday 8th of October 2010 11:57:45 PM
Old 10-09-2010
I am sorry but I only know the queue depths for the EMC family (symmetrix, clariion, hds) but I would think that 16 would be a good point to start - extend it carefully up to 32 if you like to see if your performance is improving. Another thought ... the default for hba's on 5.3 is as far as I know 1 gig - if you are sure your entire infrastructure (switches and so on) supports 4 gig, you can try and open up your adapters to 4 gig using chdev command.

Hope that helps
regards
zxmaus
 

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LEARN ABOUT DEBIAN

ql-hba-snapshot

ql-hba-snapshot(8)					       System Administration						ql-hba-snapshot(8)

NAME

       ql-hba-snapshot - display specific information of the QLogic HBA.

SYNOPSIS

       ql-hba-snapshot <Host number> [OPTIONS]

DESCRIPTION

       FC HBA Snapshot Utility

       This  utility  displays	the  details  of  the QLogic HBA attached to the system. It uses one of the two file systems for scanning: proc or
       sysfs.

       <Host number> | <-a/--all> [optional]

	      Provide the <HOST NUMBER> to display the detailed information of the HBA.  With no option  specified,  general  information  of  all
	      hosts  will  be  displayed.   Ex.  # /usr/sbin/ql-hba-snapshot <Host Number> # /usr/sbin/ql-hba-snapshot --procfs <Host Number> (For
	      procfs)

       -h, --help

	      Prints the help message.	Ex.  # /usr/sbin/ql-hba-snapshot --help

       -hl, --hostlist

	      This option displays the list of QLogic hosts (HBAs) connected to this system.  The <HOST NUMBER> can be obtained by using following
	      command Ex.  # /usr/sbin/ql-hba-snapshot --hostlist

       -p, --parameters

	      This  option  displays  the  command  line parameters that can be passed to the QLogic HBA driver.  Ex.  # /usr/sbin/ql-hba-snapshot
	      --parameters <Host Number>

       -s, --statistics

	      This option displays the statistical information for specified host. Stastics option is only supported in "sysfs" based  scan.   Ex.
	      # /usr/sbin/ql-hba-snapshot --statistics <Host number/--all>

       -proc, --procfs

	      This options forces the the utility to scans information based on "procfs", instead of default sysfs.  Ex.  # /usr/sbin/ql-hba-snap-
	      shot --procfs [Other valid option]

       -v, --verbose

	      This enables verbose display. The detailed information of LUNs will be displayed in addition to standard one.  This option  is  only
	      supported in sysfs.  Ex.	# /usr/sbin/ql-hba-snapshot --verbose <Host number/-a>

SEE ALSO

       ql-dynamic-tgt-lun-disc(8), ql-lun-state-online(8), ql-set-cmd-timeout(8)

Matthias Schmitz <;matthias@sigxcpu.org> 			     July 2009							ql-hba-snapshot(8)
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