◆スワップしまくってる例
○vmstatでswapのsiを確認
$ 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
4 0 1903740 47244 12560 1268340 0 0 0 13264 1592 3051 2 1 74 24 0
0 1 1903416 46624 12592 1268272 644 0 652 18824 2040 4967 3 1 74 23 0
1 1 1903124 46324 12600 1268248 408 0 416 19024 1936 4234 4 1 67 28 0
0 2 1902968 45300 12632 1269236 384 0 4868 23380 1748 1888 12 3 70 15 0
0 1 1902920 45300 12632 1269424 48 0 48 23468 2207 6560 4 1 71 24 0
0 2 1902916 45300 12648 1269372 92 0 92 20840 1939 4230 4 1 69 26 0
0 1 1902916 45308 12648 1269384 0 0 0 20788 2010 4530 3 1 71 25 0
0 1 1902916 45308 12648 1269476 0 0 0 21536 2104 6102 2 1 73 23 0
○topでSwapのusedを確認
used / totalの値が高く、Mem:のfreeが小さい場合→swap@@
$ top
top - 12:10:13 up 168 days, 17:23, 1 user, load average: 1.82, 1.49, 1.34
Tasks: 130 total, 1 running, 129 sleeping, 0 stopped, 0 zombie
Cpu(s): 3.2%us, 0.7%sy, 0.0%ni, 68.9%id, 26.8%wa, 0.1%hi, 0.2%si, 0.0%st
Mem: 8182288k total, 8137832k used, 44456k free, 12684k buffers
Swap: 2031608k total, 1884472k used, 147136k free, 1267128k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3746 mysql 15 0 6555m 5.7g 3464 S 15.6 73.4 37:04.92 mysqld
19103 hoge 15 0 12736 1096 816 R 0.3 0.0 0:00.40 top
※swapはしばらく保持されるので、Mem:のfreeと併せてみるべし^3^)ノ