增加swap分区:
[root@node2 ~]# free -m
total used free shared buffers cached
Mem: 1562 1515 46 0 9 1420
-/+ buffers/cache: 85 1476
Swap: 2047 0 2047
[root@node2 ~]# dd if=/dev/zero of=/swpf bs=1M count=2000
2000+0 records in
2000+0 records out
2097152000 bytes (2.1 GB) copied, 13.6735 seconds, 153 MB/s
[root@node2 ~]# mkswap -c /swpf
Setting up swapspace version 1, size = 2097147 kB
[root@node2 ~]# swapon /swpf
Mem: 1562 1515 47 0 24 1391