we have more than 30 % free space on the drive. and for fragmentation: we are vmware shop with EMC SAN(VMAX thin pools) and EMC doesn't recommend running defrag from windows, even if windows report fragmentation.

I have noticed from windows that write latency go upto 35 ms during peak activity, but from VMAX it looks normal. May be we are hitting the roof on disk queue or file limits.

is there a way to check from SSRS, the delay after the report has been processed and rendered to the time taken for the file being delivered?

thanks