[root@cdh-1 sbin]# free -g
total used free shared buff/cache available
Mem: 62 16 18 0 27 45
Swap: 15 0 15
[root@cdh-1 sbin]# cat /proc/vmstat | egrep "dirty|writeback"
nr_dirty 62
nr_writeback 0
nr_writeback_temp 0
nr_dirty_threshold 3387573
nr_dirty_background_threshold 1129191
[root@cdh-1 sbin]# sysctl -w vm.swappiness=0
vm.swappiness = 0
[root@cdh-1 sbin]# echo "vm.swappiness = 0">> /etc/sysctl.conf
[root@cdh-1 sbin]# swapoff -a
[root@cdh-1 sbin]# free -g
total used free shared buff/cache available
Mem: 62 16 18 0 27 45
Swap: 0 0 0
[root@cdh-1 sbin]# sysctl -p
vm.swappiness = 10
vm.swappiness = 0
[root@cdh-1 sbin]# free -g
total used free shared buff/cache available
Mem: 62 16 18 0 27 45
Swap: 0 0 0
第一部分Mem行解释:
total: 内存总数;
used: 已经使用的内存数;
free: 空闲的内存数;
Buffers/cached: 磁盘缓存的大小。
关系: total = used + free +Buffers/cached
文档更新时间: 2020-01-05 15:23 作者:李延召