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05-31-2012 01:51 PM - last edited on 01-04-2015 09:13 PM by Maiko-I
05-31-2012 01:51 PM - last edited on 01-04-2015 09:13 PM by Maiko-I
queue depth with EVA P6500 and HP-UX
Hi,
We have a rp7440 server running HP-UX. External disks for this server are in a EVA P6500 storage
Occasionally the users reported performance problems of applications. These problems are due to the slowness in processing i/o.
When we look at sar-d avque column sometimes shows high values (from 10 to 300).
There is a recommendation to increase the value of the queue depth to a higher value (can reach 255).
My question is:
What negative effects could occur if the queue depth increases to a higher value, eg 128?
Thanks in advance.
P.S. This thread has been moved from General to Storage Area Networks (SAN) (Enterprise). - Hp Forum Moderator