ZFS Benchmark for measuring storage performance

Benchmark to measure the storage performance when I send database query.

I install Mysql because it has its own benchmark mysqlslp. I use also sysbench.
The problem is how to measuring storage performance when the query is sent, and what is the most important parameters to be put under stress.

The file system is ZFS, and the network protocol is NFS.

I am sorry if this question is easy but for me as new in this area it is difficult. please help.