【发布时间】：2015-07-22 03:12:38
【问题描述】：
我让 VMWare 安装 CentOS 5.5 并部署一些 java 应用程序。 我想知道还有多少内存，当我使用下面的命令时，所有内存都已使用。 但是当我使用 top 命令检查时，所有进程都使用“0.0%”的内存。 所以我想知道发生了什么？此 VM 上的实际内存使用量是多少？
问候， 萨提特
[root@web1 ~]# free -t -m
total used free shared buffers cached
Mem: 16050 15911 139 0 185 15051
-/+ buffers/cache: 674 15376
Swap: 49151 0 49151
Total: 65202 15911 49290
[root@web1 ~]# cat /proc/meminfo
MemTotal: 16435972 kB
MemFree: 142484 kB
Buffers: 189632 kB
Cached: 15413188 kB
SwapCached: 0 kB
Active: 1095596 kB
Inactive: 15032400 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 16435972 kB
LowFree: 142484 kB
SwapTotal: 50331604 kB
SwapFree: 50331604 kB
Dirty: 48 kB
Writeback: 0 kB
AnonPages: 525148 kB
Mapped: 31580 kB
Slab: 103152 kB
PageTables: 8840 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 58549588 kB
Committed_AS: 1138116 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 287644 kB
VmallocChunk: 34359450359 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
Hugepagesize: 2048 kB
top - 10:05:02 up 7 days, 17:36, 2 users, load average: 0.01, 0.03, 0.00
Tasks: 165 total, 1 running, 164 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 16435972k total, 16293488k used, 142484k free, 189636k buffers
Swap: 50331604k total, 0k used, 50331604k free, 15413352k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
919 root 10 -5 0 0 0 S 0.3 0.0 0:38.53 kjournald
1 root 15 0 10368 684 572 S 0.0 0.0 0:00.75 init
2 root RT -5 0 0 0 S 0.0 0.0 0:00.58 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.72 migration/1
5 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
6 root RT -5 0 0 0 S 0.0 0.0 0:00.43 migration/2
7 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/2
8 root RT -5 0 0 0 S 0.0 0.0 0:02.25 migration/3
9 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/3
10 root RT -5 0 0 0 S 0.0 0.0 0:00.21 migration/4
11 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/4
12 root RT -5 0 0 0 S 0.0 0.0 0:00.83 migration/5
13 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/5
14 root RT -5 0 0 0 S 0.0 0.0 0:00.40 migration/6
15 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/6
16 root RT -5 0 0 0 S 0.0 0.0 0:00.32 migration/7
17 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/7
18 root 10 -5 0 0 0 S 0.0 0.0 0:00.21 events/0
19 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/1
20 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/2
21 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/3
22 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/4
23 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/5
24 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/6
25 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events/7
26 root 10 -5 0 0 0 S 0.0 0.0 0:00.66 khelper
【问题讨论】：