Hi,
When bytesReads and bytesWritten from fn_virtualfilestats are reset to 0.
I have collected info from virtualfilestats for dayn and I collected for dayn+1 and I found that :
dayn dayn+1
BytesReads 12000 3500
BytesWritten 10000 3200
Commonly for dayn+1, the values have to be bigger.
Ahmed