How to Check Unused Memory (sar -r)
Use the sar -r command to report the number of memory pages and swap-file disk blocks that are currently unused.
$ sar -r 00:00:00 freemem freeswap 01:00:00 2135 401922 |
The following table describes the output from the -r option.
Table 24–16 Output From the sar -r Command|
Field Name |
Description |
|---|---|
|
freemem |
The average number of memory pages that are available to user processes over the intervals sampled by the command. Page size is machine-dependent. |
|
freeswap |
The number of 512-byte disk blocks that are available for page swapping. |
Example—Checking Unused Memory
The following example shows output from the sar -r command.
$ sar -r SunOS venus 5.9 Generic sun4u 06/24/2001 00:00:00 freemem freeswap 01:00:00 2135 401922 02:00:02 2137 401949 03:00:00 2137 402006 04:00:00 2139 401923 05:00:01 2138 402033 06:00:00 2137 401919 Average 2500 399914 |
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