Tools for performance and resource utilization

Use these tools when debugging performance problems or measuring resource utilization.

sadc - System activity data collector
The sadc command samples system data a specified number of times at a specified interval measured in seconds. It writes to the specified output file or the standard output in binary format. The sadc command is a backend to the sar command.
iostat - Monitor input/output device load
The iostat command monitors system input/output device load by observing the time that the devices are active in relation to their average transfer rates.
z/VM MONWRITE - Collect CP *MONITOR data
If your Linux™ system runs as a guest operating system under z/VM® and encounters performance problems, use the MONWRITE utility and include CP *MONITOR data in the problem report.
Collecting data using DASD statistics
The DASD statistics kernel function monitors the activities of the DASD device driver and the storage subsystem. It mainly records processing time of I/O operations within a given time interval.
Displaying DASD performance data
The dasdstat command reports the statistics over time and gather data for individual devices or across all devices. The statistics include performance data about Parallel Access Volume (PAV) and High Performance FICON.
ziomon - Collect FCP performance data
ziorep - Create FCP performance report
After you collect FCP performance data using the ziomon tool, use the ziorep tool to create appropriate FCP performance reports.
Obtaining QDIO performance statistics
Use the QDIO performance statistics to obtain information of QDIO devices. These statistics apply to FCP devices and to qeth devices.

Parent topic: Tools for troubleshooting