how do I find disks queue depth on vmax ? what is recommended level ?

[nickpatel46]

Hi Folks,

I would like to find out what is disk queue depth set on our vmax. How Do I find that information ? What is recommendation level ?  I will appreciate your reply.

Thanks

[Quincy561]

There is a average disk queue counter on the drive stats.  To get good response time from the drives, the queue should be low, 1 or 2.  To get the maximum throughput from the drives, you need more IOs queued, but the response time will suffer.  There is no setting for this.

[sauravrohilla]

In SPA's diag view, you get the avg queue depth for each disk but dont know if its correct or not.

regards,

Saurabh

[Quincy561]

That can't be correct.  Something is wrong.  I would suggest opening a case.  Maybe you need a SE/SPA update.