再给服务器添加zabbix监控的时候,发现服务器有个报错“Lack of free swap space on localhost”,通过查找得知,在安装服务器的时候忘了划分swap分区。为了减少报错,现在直接划分swap分区,具体步骤如下:
1,使用dd命令创建一个swap分区
[[email protected] home]# dd if=/dev/zero of=/home/swap bs=1024 count=8192000 8192000+0 records in 8192000+0 records out 8388608000 bytes (8.4 GB) copied, 33.5006 s, 250 MB/s
这样就创建了一个分区大小为8G的/home/swap文件,接下来格式化该分区文件。
2,格式化/home/swap文件。
[[email protected] home]# mkswap /home/swap mkswap: /home/swap: warning: don‘t erase bootbits sectors on whole disk. Use -f to force. Setting up swapspace version 1, size = 8191996 KiB no label, UUID=4ae031dd-eefe-43ba-8fb0-c09719d896b6
3,用swapon命令把/home/swap文件分区划成swap分区
[[email protected] home]# swapon /home/swap [[email protected] home]# free -m total used free shared buffers cached Mem: 7872 7730 142 0 70 6394 -/+ buffers/cache: 1264 6608 Swap: 7999 0 7999
4,修改/etc/fstab文件添加/home/swap swap swap default 0 0,即使重启也能自动挂载。
[[email protected] home]# vi /etc/fstab # # /etc/fstab # Created by anaconda on Tue Jan 26 21:10:02 2016 # # Accessible filesystems, by reference, are maintained under ‘/dev/disk‘ # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=f8cb78d5-8419-4bcf-8684-9e8a94480f22 / ext4 defaults 1 1 UUID=9e4bacd3-490c-4e87-a5e0-fec240a3e229 /usr xfs defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /home/swap swap swap default 0 0 "/etc/fstab" 16L, 788C written
备注:count的计算公式: count=SIZE*1024 (size以MB为单位)
时间: 2024-11-05 18:58:33