Monitoring Disk Read and Write rate

[stltech]

Hiya,

I am monitoring performance of a VM which has uses a VMware host local disk as Drive D which is a 1TB drive for application paging. This 1TB drive consists of 4 x 278GB Drives in a RAID 0 Setup

I am looking in vCenter at the Performance View > Advanced so I can monitor the below statistics

Usage in %

Read Rate in KBps

Write Rate KBps

Highest Latency in milliseconds

While I know the acceptable limits for the usage and the latency, there does not seem to be any thing which gives a rough idea of what is a good Read and Write rate out there.

I know it is very dependent on whether this was a shared datastore, type of disks, type of RAID, cache setup, storage connector setup and speed etc but just wondering if anyone knows of anywhere where it would be possible to find some rough figures for what is good and what is heading into a danger zone

Thanks v much

[rcporto]

I think you should start form the VM perspective... try for example check if there is some read/write queue on the Guest (if a Windows VM, use perfmon)... because if there is not a high read/write demand from Guest, the read/write rate statistics will be low.

[stltech]

Thanks for the reply. I'll check out the disk perfmon counters and try a Data Collector Set as well over a period of time

[lakshya32]

Hi

Welcome to communities.

As always recommenced best practice here is the link

https://www.vmware.com/files/pdf/support/landing_pages/Virtual-Support-Day-Storage-Best-Practices-June-2012.pdf