How to Check Swapping Activity (sar -w)
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Use the sar -w command to report swapping and switching activity.
$ sar -w 00:00:00 swpin/s bswin/s swpot/s bswot/s pswch/s 01:00:00 0.00 0.0 0.00 0.0 22
The following list describes target values and observations related to the sar -w command output.
- swpin/s
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The number of LWP transfers into memory per second.
- bswin/s
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The number of blocks transferred for swap-ins per second. /* (float)PGTOBLK(xx->cvmi.pgswapin) / sec_diff */
- swpot/s
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The average number of processes that are swapped out of memory per second. If the number is greater than 1, you might need to increase memory.
- bswot/s
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The number of blocks that are transferred for swap-outs per second.
- pswch/s
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The number of kernel thread switches, per second.
Note –All process swap-ins include process initialization.
Example 13–16 Checking Swap Activity (sar -w)
The following example shows output from the sar -w command.
$ sar -w SunOS balmyday 5.10 s10_51 sun4u 03/18/2004 00:00:04 swpin/s bswin/s swpot/s bswot/s pswch/s 01:00:00 0.00 0.0 0.00 0.0 132 02:00:01 0.00 0.0 0.00 0.0 133 03:00:00 0.00 0.0 0.00 0.0 133 04:00:00 0.00 0.0 0.00 0.0 134 05:00:00 0.00 0.0 0.00 0.0 133 06:00:00 0.00 0.0 0.00 0.0 133 07:00:00 0.00 0.0 0.00 0.0 132 08:00:00 0.00 0.0 0.00 0.0 131 08:20:00 0.00 0.0 0.00 0.0 133 08:40:01 0.00 0.0 0.00 0.0 132 09:00:00 0.00 0.0 0.00 0.0 132 09:20:00 0.00 0.0 0.00 0.0 132 09:40:00 0.00 0.0 0.00 0.0 335 10:00:00 0.00 0.0 0.00 0.0 601 10:20:00 0.00 0.0 0.00 0.0 353 10:40:00 0.00 0.0 0.00 0.0 747 11:00:00 0.00 0.0 0.00 0.0 804 Average 0.00 0.0 0.00 0.0 198 |
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