过去一周，我的 CentOS VPS 内存使用率达到 99%。
[root@server ~]# free -m
total used free shared buffers cached
Mem: 2048 2032 15 2 0 17
-/+ buffers/cache: 2014 33
Swap: 2048 45 2002
重新启动服务器后，内存将在 2 小时内缓慢增加，然后服务器的内存使用率再次达到 99%。
[root@server ~]# top
top - 13:34:10 up 2 days, 17:30, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 49 total, 1 running, 47 sleeping, 1 stopped, 0 zombie
Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2097152k total, 349744k used, 1747408k free, 0k buffers
Swap: 2097152k total, 0k used, 2097152k free, 52452k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 19236 1456 1216 S 0.0 0.1 0:00.06 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd/221
3 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khelper/221
133 root 16 -4 10644 660 396 S 0.0 0.0 0:00.00 udevd
493 root 20 0 179m 1460 1056 S 0.0 0.1 0:00.02 rsyslogd
540 root 20 0 66220 1176 464 S 0.0 0.1 0:00.01 sshd
574 root 20 0 11308 1464 1208 S 0.0 0.1 0:00.00 mysqld_safe
676 mysql 20 0 432m 20m 5612 S 0.0 1.0 0:00.31 mysqld
702 root 20 0 19268 756 500 S 0.0 0.0 0:00.00 dovecot
710 dovecot 20 0 12988 1068 872 S 0.0 0.1 0:00.00 anvil
711 root 20 0 13116 1188 872 S 0.0 0.1 0:00.00 log
784 root 20 0 80860 3388 2472 S 0.0 0.2 0:00.01 master
792 postfix 20 0 80940 3296 2424 S 0.0 0.2 0:00.00 pickup
任何帮助都将非常有帮助，谢谢。
Shift-M 顶部
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
676 mysql 20 0 432m 20m 5612 S 0.0 1.0 0:00.70 mysqld
795 root 20 0 127m 16m 3740 S 0.0 0.8 0:00.11 cwpsrvd
812 root 20 0 127m 13m 764 S 0.0 0.7 0:00.00 cwpsrvd
811 root 20 0 127m 13m 760 S 0.0 0.7 0:00.00 cwpsrvd
813 root 20 0 127m 13m 760 S 0.0 0.7 0:00.00 cwpsrvd
814 root 20 0 127m 13m 760 S 0.0 0.7 0:00.00 cwpsrvd
815 root 20 0 127m 13m 760 S 0.0 0.7 0:00.00 cwpsrvd
851 root 20 0 99972 4332 3348 S 0.0 0.2 0:00.06 sshd
1226 postfix 20 0 81132 3956 2860 S 0.0 0.2 0:00.00 tlsmgr
3744 root 20 0 98632 3816 2880 S 0.0 0.2 0:00.00 sshd
784 root 20 0 80860 3388 2472 S 0.0 0.2 0:00.01 master
793 postfix 20 0 81008 3356 2472 S 0.0 0.2 0:00.00 qmgr
792 postfix 20 0 80940 3296 2424 S 0.0 0.2 0:00.00 pickup
3805 root 20 0 67564 3264 2504 S 0.0 0.2 0:00.00 sshd
803 root 20 0 56612 2952 1652 S 0.0 0.1 0:00.08 httpd
848 nobody 20 0 56744 2884 1368 S 0.0 0.1 0:00.00 httpd
849 nobody 20 0 56744 2884 1368 S 0.0 0.1 0:00.00 httpd
Shift-M Top（99% 内存使用率）
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
676 mysql 20 0 432m 4556 3028 S 0.3 0.2 0:04.20 mysqld
19989 dovecot 20 0 95588 4040 2860 S 0.0 0.2 0:00.01 auth
20717 root 20 0 98632 3808 2884 S 0.0 0.2 0:00.00 sshd
851 root 20 0 99972 3068 2904 S 0.0 0.1 0:00.16 sshd
1226 postfix 20 0 81132 2332 2240 S 0.0 0.1 0:00.00 tlsmgr
784 root 20 0 80860 2192 2100 S 0.0 0.1 0:00.06 master
猫/proc/meminfo
MemTotal: 2097152 kB
MemFree: 3796 kB
Cached: 18472 kB
Buffers: 0 kB
Active: 19628 kB
Inactive: 6712 kB
Active(anon): 3608 kB
Inactive(anon): 4260 kB
Active(file): 16020 kB
Inactive(file): 2452 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 2097152 kB
SwapFree: 2059452 kB
Dirty: 24 kB
Writeback: 0 kB
AnonPages: 7868 kB
Shmem: 2708 kB
Slab: 2067000 kB
SReclaimable: 2057576 kB
SUnreclaim: 9424 kB