Performance monitoring tools

The following performance monitoring tools are available on the AIX® operating system. Similar tools are available on other UNIX® and Linux® operating system:
vmstat
Gives statistics about virtual memory, disks, traps, and processor activity. Use it to determine system loading.
iostat
Gives processor statistics and I/O statistics for tty, disks, and CD-ROM drives.
sar (system activity report)
Collects, reports, or saves system activity information.
netstat
Shows network status.
IBM® Performance Toolbox
Provides some useful performance tools that are integrated into a graphical user interface.

Refer also to the performance and tuning documentation for TCP/IP, CICS® Transaction Server for z/OS®, and TXSeries®, and the documentation supplied with your operating system.