Unix Performance Management

Today I was with one of our customers and we ran into a performance issue. The first request to a remote procedure call took 15 seconds extra time. Uptill now we could't figure out wat the cause was of this performance problem but these two tools could be very usefull for measuring things on OS level.

Viewing the memory statistics every 5 sec:

vmstat 5

Disk I/O statistics every 5 sec:

iostat -Ds 5

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