centos7执行内存拉圾回收shell命令
runCmd.sh "sync" all
runCmd.sh "echo 1 > /proc/sys/vm/drop_caches" all
runCmd.sh "echo 3 > /proc/sys/vm/drop_caches" all
执行之前的情况
[root@node111 ~]# runCmd.sh "free -g" all
*******************node111***************************
total used free shared buff/cache available
Mem: 11 2 7 0 1 8
Swap: 7 0 7
*******************node112***************************
total used free shared buff/cache available
Mem: 11 1 8 0 1 9
Swap: 7 0 7
*******************node113***************************
total used free shared buff/cache available
Mem: 15 0 13 0 1 14
Swap: 7 0 7
*******************node114***************************
total used free shared buff/cache available
Mem: 31 3 26 0 0 27
Swap: 7 0 7
*******************node115***************************
total used free shared buff/cache available
Mem: 23 1 14 0 6 21
Swap: 7 0 7
*******************node116***************************
total used free shared buff/cache available
Mem: 23 1 14 0 6 21
Swap: 7 0 7
*******************node117***************************
total used free shared buff/cache available
Mem: 23 1 15 0 5 21
Swap: 7 0 7
*******************node118***************************
total used free shared buff/cache available
Mem: 23 1 15 0 6 21
Swap: 7 0 7
*******************node119***************************
total used free shared buff/cache available
Mem: 23 1 15 0 6 21
Swap: 7 0 7
*******************node120***************************
total used free shared buff/cache available
Mem: 23 1 14 0 6 21
Swap: 7 0 7
*******************node121***************************
total used free shared buff/cache available
Mem: 23 1 13 0 7 21
Swap: 7 0 7
*******************node122***************************
total used free shared buff/cache available
Mem: 23 1 14 0 7 21
Swap: 7 0 7
*******************node123***************************
total used free shared buff/cache available
Mem: 23 1 13 0 8 21
Swap: 7 0 7
[root@node111 ~]# runCmd.sh "sync" all
具体执行情况如下所示：
[root@node111 ~]# runCmd.sh "sync" all
*******************node111***************************
*******************node112***************************
*******************node113***************************
*******************node114***************************
*******************node115***************************
*******************node116***************************
*******************node117***************************
*******************node118***************************
*******************node119***************************
*******************node120***************************
*******************node121***************************
*******************node122***************************
*******************node123***************************
[root@node111 ~]# runCmd.sh "echo 1 > /proc/sys/vm/drop_caches" all
*******************node111***************************
*******************node112***************************
*******************node113***************************
*******************node114***************************
*******************node115***************************
*******************node116***************************
*******************node117***************************
*******************node118***************************
*******************node119***************************
*******************node120***************************
*******************node121***************************
*******************node122***************************
*******************node123***************************
[root@node111 ~]# runCmd.sh "free -g" all
*******************node111***************************
total used free shared buff/cache available
Mem: 11 2 8 0 0 8
Swap: 7 0 7
*******************node112***************************
total used free shared buff/cache available
Mem: 11 1 9 0 0 9
Swap: 7 0 7
*******************node113***************************
total used free shared buff/cache available
Mem: 15 0 14 0 0 14
Swap: 7 0 7
*******************node114***************************
total used free shared buff/cache available
Mem: 31 3 27 0 0 27
Swap: 7 0 7
*******************node115***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node116***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node117***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node118***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node119***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node120***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node121***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node122***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
*******************node123***************************
total used free shared buff/cache available
Mem: 23 1 21 0 0 21
Swap: 7 0 7
[root@node111 ~]# ^C