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ParoX
Asked: 2013-01-14 09:58:08 +0800 CST

Where is my RAM going? Top command included [duplicate]

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Possible Duplicate:
How to understand the memory usage and load average in linux server 

Tasks:  39 total,   1 running,  37 sleeping,   0 stopped,   1 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:   2097152k total,  1104824k used,   992328k free,        0k buffers
Swap:        0k total,        0k used,        0k free,  1026992k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
13617 mysql     20   0  170m  28m 6892 S    0  1.4   0:00.31 mysqld
24471 root      20   0  324m  21m 3584 S    0  1.1  18:04.37 MCMA2_Linux_x86
13432 root      20   0  208m  10m 5304 S    0  0.5   0:00.01 apache2
13441 www-data  20   0  208m 5844  660 S    0  0.3   0:00.00 apache2
13732 root      20   0 79008 3564 2816 S    0  0.2   0:00.02 sshd
13210 root      20   0 79008 3532 2792 S    0  0.2   0:00.01 sshd
13729 root      20   0 79008 3528 2792 S    0  0.2   0:00.01 sshd
13734 root      20   0 17768 1960 1432 S    0  0.1   0:00.00 bash
13508 root      20   0 17572 1560 1248 S    0  0.1   0:00.00 mysqld_safe
13738 root      20   0 18944 1288 1020 R    0  0.1   0:00.01 top
13212 root      20   0 12324  904  732 S    0  0.0   0:00.00 sftp-server
13731 root      20   0 12324  904  732 S    0  0.0   0:00.00 sftp-server
13618 root      20   0  3860  664  568 S    0  0.0   0:00.00 logger
  659 root      20   0 58128  468  272 S    0  0.0   0:28.29 sendmail-mta
  465 root      20   0  5988  456  332 S    0  0.0   0:05.33 syslogd
24468 root      20   0 23808  448  112 S    0  0.0   0:00.40 screen
  567 root      20   0 49180  324  208 S    0  0.0   0:05.82 sshd
  543 root      20   0 20912  236  152 S    0  0.0   0:01.27 cron
    1 root      20   0  8360   92   56 S    0  0.0   0:08.20 init
  573 root      20   0 19340    8    4 S    0  0.0   0:00.00 xinetd
  858 root      20   0 23940    8    4 S    0  0.0   0:00.17 screen
  859 root      20   0 17760    8    4 S    0  0.0   0:00.04 bash
 4084 root      20   0 23676    8    4 S    0  0.0   0:00.01 screen
 4085 root      20   0 17756    8    4 S    0  0.0   0:00.00 bash
 4255 root      20   0 23676    8    4 S    0  0.0   0:00.03 screen
 4256 root      20   0 17756    8    4 S    0  0.0   0:00.00 bash
 4505 root      20   0 24080    8    4 S    0  0.0   0:00.03 screen
 4506 root      20   0 17756    8    4 S    0  0.0   0:00.00 bash
 4713 root      20   0 17760    8    4 S    0  0.0   0:00.00 bash
 5149 root      20   0 23972    8    4 S    0  0.0   0:00.45 screen
 5150 root      20   0 17760    8    4 S    0  0.0   0:00.00 bash
 5358 root      20   0 17756    8    4 S    0  0.0   0:00.00 bash
 8527 root      20   0  3908    8    4 S    0  0.0   0:00.00 tail
24469 root      20   0 17764    8    4 S    0  0.0   0:00.00 bash
  476 root      20   0 54568    4    0 S    0  0.0   0:00.00 saslauthd
  477 root      20   0 54568    4    0 S    0  0.0   0:00.00 saslauthd
    2 root      20   0     0    0    0 S    0  0.0   0:00.00 kthreadd/484

It's my understanding that the RES column is how much actual RAM is being used. Going by what top is telling me, I should be using less than 100 MB of RAM and yet top and free shows I am using 1100 MB. What is top summing to get 1100 MB?

Is it because there is no swap, VIRT then takes out of mem?

I am using a VPS, so I think it has something to do with that?

memory

1 Answers

  1. The top command is showing you using 1104824k, or 1,104,824k ~ 1100 Megabytes... Out of a total of 2097152k - 2GB RAM.

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