Measure disk performance
Can someone help me find a tool to measure disk performance?
The situation is :
Redhat 7.3 running Lotus Domino. We have a mirrored disk set (raid 1)containing the swap file and the transactional logs from Domino.
I believe the disk set is overworked and is causing the system to slow down. But, how do I prove this to my manager and justify some more disks?
I've looked at the usual tools - df, free, top but none seem to do what I want. Which is to provide data on the work being done, so how many writes/second to swap file | transactional log.
Any ideas ?