Whenever any type of historical system statistics such as load average, CPU utilization, I/O wait state, or memory usage is needed the sar (System Activity Reporter) is best choice.
SAR (System Activity Reporter) is a command that ships with the sysstat package.
Sysstat is a collection of Unix tools used for performance monitoring, the package includes tools such as iostat, mpstat, pidstat, sadf and sar.
So this data is useful in such cases:
- high CPU usage close to 100%
- sudden very high memory usage
- network issues
- hang situations of HANA
SAP HANA Platform
sar, sysstat, ksar, sa1, sa2, sadc, , KBA , HAN-DB-PERF , SAP HANA Database Performance , How To
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