Problem
dmp_monitor_fabric is turned off on AIX platform by default because of performance issues
Error Message
The default value of dmp_monitor_fabric is listed incorrectly as "on". The default value should be off on AIX platform.
# vxdmpadm gettune dmp_monitor_fabric
Tunable Current Value Default Value
------------------------------ ------------- -------------
dmp_monitor_fabric off on <<< Default value is incorrectly listed as on
Cause
The decision to turn off dmp_monitor_fabric is based on the performance issue found during Symantec internal tests. The dmp_monitor_fabric is turned off by running vxdmpadm settune command during product installation.
Solution
dmp_monitor_fabric is turned off permanently by running vxdmpadm settune during product installation. The setting is stored permanently in the following file.
# cat /etc/vx/ddlpolicy.info
esd
dmp_monitor_fabric=off
Symantec is working with IBM to find a solution to the performance issues related to the SNIA (Storage Network Industry Association) HBA APIs on AIX.
Applies To
dmp_monitor_fabric is turned off by default on the AIX platform. dmp_monitor_fabric is turned on by default on the other platforms.
References
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