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Linux Performance Monitoring

Linux performance monitoring historically relied on ported versions of standard Unix tools such as netstat, vmstat, and ps. These local tools take performance snapshots when executed on a system but provide no insights into performance trends, peaks or valleys nor do they offer enough information for predictive or in-depth analysis. System performance is more valuable when viewed over time and in various states of load.

Linux performance monitoring historically relied on ported versions of standard Unix tools such as netstat, vmstat, and ps. These local tools take performance snapshots when executed on a system but provide no insights into performance trends, peaks or valleys nor do they offer enough information for predictive or in-depth analysis. System performance is more valuable when viewed over time and in various states of load.

A newer tool, sar (System Activity Reporter), yields performance data collected at designated intervals (Every 5 or 10 minutes). Sar data, while very thorough, is somewhat difficult to read and several parameters, while interesting, are a bit esoteric.

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