linux???????????????--CPU??Memory??IO??Network
???????????? ???????[ 2013/9/17 15:09:44 ] ????????
??????????????????????????CPU??Memory??IO??Network????????棬???????????ù???????
???????CPU
????1???????????
????CPU???????User Time <= 70%??System Time <= 35%??User Time + System Time <= 70%??
???????????л?????CPU????????????????CPU??????????????????????????л????????????
?????????ж??У????????????????ж???<=3??????
????2????????
vmstat
$ vmstat 1
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
14 0 140 2904316 341912 3952308 0 0 0 460 1106 9593 36 64 1 0 0
17 0 140 2903492 341912 3951780 0 0 0 0 1037 9614 35 65 1 0 0
20 0 140 2902016 341912 3952000 0 0 0 0 1046 9739 35 64 1 0 0
17 0 140 2903904 341912 3951888 0 0 0 76 1044 9879 37 63 0 0 0
16 0 140 2904580 341912 3952108 0 0 0 0 1055 9808 34 65 1 0 0
?????????????
????r??run queue???????ж??е??????????Щ????????????????????CPU??????????
????b????blocked???????????????IO????
????in??interrupts????????????ж???
????cs??context switch???????????????????л??????
????us????????CPU?????
????sys???????ж????CPU?????
????id??CPU??????е????
????????????
????sy??us???????????????????л???cs?????????ó????????????????????
???????4???????r?????12???????????r??14?????????????CPU????????
?????????????????CPU???
$ while :; do ps -eo pid??ni??pri??pcpu??psr??comm | grep 'test_command'; sleep 1; done
PID NI PRI %CPU PSR COMMAND
28577 0 23 0.0 0 test_command
28578 0 23 0.0 3 test_command
28579 0 23 0.0 2 test_command
28581 0 23 0.0 2 test_command
28582 0 23 0.0 3 test_command
28659 0 23 0.0 0 test_command
……
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