sar

SafeHistorical performance (sar)

sar -u 1 5

The standard way to look *back* at performance — answer 'why was it slow last night?' with sar -f.

Examples

sar -u -f /var/log/sa/sa10CPU history for the 10th

Syntax

sar [-u|-r|-d|-n DEV] [interval count] [-f file]

Before you run it

Read only.

Related commands

vmstatMemory/CPU/swap statistics
iostatDisk I/O statistics
pidstatPer-process performance

The same reference, with no signal at all

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