centos/linux扩容Swap分区
[root@node1 ~]# free -h total used free shared buff/cache available Mem: 15G 3.8G 2.1G 57M 9.6G 11G Swap: 0B 0B 0B
[root@node1 ~]# dd if=/dev/zero of=/swapfile bs=1024 count=4096000 4096000+0 records in 4096000+0 records out 4194304000 bytes (4.2 GB) copied, 11.2798 s, 372 MB/s [root@node1 ~]# ls -lth / | grep swap -rw-r--r-- 1 root root 4.0G Jul 11 09:48 swapfile
将此分区转换为Swap分区
[root@node1 ~]# mkswap /swapfile Setting up swapspace version 1, size = 4095996 KiB no label, UUID=d40f6aad-6764-4dc4-830f-6f676f5c6fd2
将此分区加入Swap
[root@node1 ~]# swapon /swapfile swapon: /swapfile: insecure permissions 0644, 0600 suggested.
查看一下
[root@node1 ~]# swapon -s Filename Type Size Used Priority /swapfile file 4095996 0 -1
看下Swap大小
[root@node1 ~]# free -h total used free shared buff/cache available Mem: 15G 3.8G 165M 57M 11G 11G Swap: 3.9G 0B 3.9G