Monitoring tools

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The study used the Oracle AWR reports as a starting point for performance analysis.

If contention or excessive latencies take place, they show up in the Top 5 wait events as a high percentage of the run time, and they can be analyzed further with detailed information such as the relevant wait events or the cache information.

SADC and SAR were the primary tools used to evaluate the Linux performance. iostat data is used to complete the disk statistics data. The dasd statistics as reported in /proc/dasd/devices are evaluated specifically for the tests with DASD devices,