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 touchstone 5.9 Generic sun4u 03/04/2003 00:00:00 freemem freeswap 01:00:00 3454 834587 02:00:00 3449 834549 03:00:00 3446 834552 04:00:00 3440 834722 05:00:00 3433 834535 06:00:00 3432 834557 07:00:00 3426 834526 08:00:00 3423 834502 08:20:01 3425 835158 08:40:00 3421 834453 09:00:00 3422 834473 09:20:01 2455 817457 09:40:01 651 768238 10:00:02 862 748302 10:20:03 373 713652 10:40:01 506 717459 11:00:01 668 716669 11:20:01 537 715802 Average 2907 815627 |
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