Hello, I have been scratching my head with the results of a report from Vrealize Operations Manager. It is listed under Performance, Summary| MAX Vm Disk Latency (ms)
There is a VM Disk Latency (95th percentile) column. Out of our 30-40 datastores, there are two used for VDI's that are in seconds. I have been unable to find a reason for this. I have looked at the flash storage array, the hosts, used esxtop, used iometer... I do see a reference in the vRealize Operations Manager manual that Datastore | Disk Command Latency shows the adjusted read and write latency on the datastore level. I did see that there was quite a bit more read IO's than write IO's.
At this point I'm wondering if it has to do with firmware/drivers/incorrect readings? Esx is at 6.5.0, on a Cisco UCS.
I appreciate any thoughts/ideas.
| Max VM Disk Latency | VM Disk Latency (95th percentile) | VMs |
| 68,832.89 | 10.27 ms | 6 |
| 65,418.18 | 17.57 ms | 20 |
| 58,868.16 | 129.02 ms | 25 |
| 24,742.77 | 5.73 ms | 26 |
| 24,719 | 8.47 Second(s) | 42 |
| 21,058.99 | 1.59 Second(s) | 24 |
| 3,297.15 | 329.07 ms | 14 |
| 1,419.53 | 826.2 μs | 24 |
| 916.58 | 133.33 μs | 20 |
| 674.07 | 4.57 ms | 45 |
| 197.6 | 321.57 μs | 26 |
| 86.33 | 130.02 μs | 28 |
| 82.91 | 16.02 μs | 7 |
| 69.39 | 70.28 μs | 19 |
| 68.69 | 913.98 μs | 12 |
| 55.07 | 14.48 ms | 19 |
| 53.67 | 20.56 ms | 18 |
| 51.07 | 1 ms | 18 |