AIX 系统性能分析及调优

识别瓶颈 性能分析工具 性能调整工具 Bound Command Description CPU bound vmstat when %user + %sys greater than 80% Disk I/O bound vmstat when %iowait greater than 40% (AIX 4.3.3 or later) Application disk bound iostat when %tm_act greater than 70% Paging space low lsps –a when used paging space greater than 70% active Paging bound iostat vmstat paging logical volumes %tm_act greater than 30% of the I/O (iostat) and paging activity greater than 10 * the number of CPUs (vmstat) Thrashing vmstat rising page outs, CPU wait and run queue