VM write latency (vSAN)

Hi,

From VM vSAN Performance graphs I routinely (daily) see at a specific time each day for around 25mins the following:

Write Latency go up from around 1ms to 110ms

Write IOPS go up from around 12 to 275

Write Throughput go up from around 1MB/s to 200MB/s

Outstanding IOPS from around 10 to to 600

I also see spikes of Local Client Cache Hit IOPS go up from 0 to around 18 at the same

Is this expected performance for an all flash vSAN with regards to the latency experienced by the VM when taking into consideration the Write throughput increase?

Read throughput also increases around the same period but Read latency remains almost the same (only goes up by 1ms).

Thanks