Linux Performance Monitoring
Source: Hyperic
Publish Date: April 2009
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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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