原因:内存不足,SWAP不足
创建分区文件,大小 4G
[root@dbmspreapp205 ~]# dd if=/dev/zero of=/data/swapfile bs=1k count=4096000 4096000+0 records in 4096000+0 records out 4194304000 bytes (4.2 GB) copied, 11.5204 s, 364 MB/s
生成 swap 文件系统
[root@dbmspreapp205 ~]# mkswap /data/swapfile mkswap: /data/swapfile: warning: don‘t erase bootbits sectors on whole disk. Use -f to force. Setting up swapspace version 1, size = 4095996 KiB no label, UUID=579f326b-b767-45e9-88f6-88348eea5414 [root@dbmspreapp205 ~]# mkswap -f /data/swapfile Setting up swapspace version 1, size = 4095996 KiB no label, UUID=0b1356c5-b1e2-40c6-9142-627a7e38e2ca
挂载 swap 文件
[root@dbmspreapp205 ~]# swapon /data/swapfile [root@dbmspreapp205 ~]# free -m total used free shared buffers cached Mem: 15948 15746 202 0 378 8830 -/+ buffers/cache: 6537 9411 Swap: 14239 70 14169
卸载 swap 文件
[root@dbmspreapp205 ~]# swapoff /data/swapfile [root@dbmspreapp205 ~]# free -m total used free shared buffers cached Mem: 15948 15744 204 0 378 8830 -/+ buffers/cache: 6535 9413 Swap: 10239 70 10169
修改 /etc/fstab 文件,新增如下内容:
/data/swapfile swap swap defaults 0 0