sadc 命令

常用示例

说明

sadc (System Activity Data Collector) is the backend data collector for the sar command, part of the sysstat package. It samples system performance data at specified intervals and writes it in binary format to an output file. The collector gathers metrics including CPU utilization, memory usage, I/O statistics, network activity, and process information. By default, it collects most kernel data except interrupts and disk statistics, which require explicit -S flags. When outfile is set to -, sadc writes to the standard daily data file /var/log/sa/saDD. If count is omitted, sadc runs endlessly. The binary output is not human-readable and requires sar to interpret.

参数

-C _comment_

Write a dummy record containing the specified comment string when interval and count are not specified

-D

Use saYYYYMMDD instead of saDD as the standard daily data file name

-F

Force creation of outfile; truncate if it exists with an incompatible format

-L

Try to get an exclusive lock on the outfile before writing or truncating

-S _keyword_

Specify optional activities to collect: INT (interrupts), DISK (block devices), XDISK (partitions/filesystems), SNMP, IPV6, POWER, ALL, XALL

-V

Print version number and exit