When I need to deal with ASM I/O statistics, the tools provided by Oracle (asmcmd iostat and asmiostat.sh from MOS [ID 437996.1]) do not suit my needs. Then, I decided to create my own asmiostat utility that is helpful for 3 main reasons: It provides useful real-time metrics. You can aggregate the results following your needs in a customizable way. It does not need any change to the source: Simply