Top is not showing my memory usage accurately or is my VPS provider doing something strange? As you see in the picture bellow it uses 90%+ of the memory, but when you look at what processes that is actually using memory it doesn't even sum up to over 30%. I know that top doesn't show correctly when processes have shared memory, but for example the httpd prodcesses that use shared memory barely take any percentage at all of the available memory even when summed up.
The top command in the picture is sorted after memory usage, so there is no big process hiding.
http://i.imgur.com/GGBXCN9.png (Apparently I didn't have enough reputation to post pictures is questions.)
Update with the top output as text:
Tasks: 49 total, 1 running, 48 sleeping, 0 stopped, 0 zombie
Cpu(s): 17.7%us, 1.1%sy, 0.0%ni, 81.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.3%st
Mem: 2097152k total, 1858988k used, 238164k free, 0k buffers
Swap: 2097152k total, 140740k used, 1956412k free, 1089504k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
812 mysql 20 0 513m 241m 5104 S 4.7 11.8 108:32.39 mysqld
882 root 20 0 344m 219m 6116 S 0.0 10.7 1:08.81 clamd
26111 root 20 0 851m 34m 9720 S 0.0 1.7 1:30.03 java
22155 cpanelro 20 0 94272 10m 2392 S 0.0 0.5 0:00.04 cpsrvd-ssl
22260 cpanelro 20 0 94092 9792 2272 S 0.0 0.5 0:00.02 cpsrvd-ssl
21175 cpanelro 20 0 94092 9704 2276 S 0.0 0.5 0:00.03 cpsrvd-ssl
7491 root 20 0 47732 8520 2176 S 0.0 0.4 0:00.10 leechprotect
623 named 20 0 245m 5256 1940 S 0.3 0.3 11:58.59 named
1639 root 20 0 46644 5172 1408 S 0.0 0.2 1:46.64 tailwatchd
1472 root 20 0 93828 4972 1352 S 0.0 0.2 0:17.42 cpsrvd-ssl
23781 root 20 0 38800 4928 2160 S 0.0 0.2 0:00.57 zsh
17788 nobody 20 0 69072 4336 2488 S 0.0 0.2 0:00.21 httpd
917 root 20 0 68588 4288 3000 S 0.0 0.2 0:28.16 httpd
21152 nobody 20 0 69124 4224 2456 S 0.0 0.2 0:00.05 httpd
20549 nobody 20 0 68992 3716 1996 S 0.0 0.2 0:00.07 httpd
20550 nobody 20 0 68992 3536 1792 S 0.0 0.2 0:00.06 httpd
21996 nobody 20 0 68992 3508 1788 S 0.0 0.2 0:00.02 httpd
20544 nobody 20 0 68992 3484 1804 S 0.0 0.2 0:00.05 httpd
21995 nobody 20 0 68992 3432 1704 S 0.3 0.2 0:00.02 httpd
22228 nobody 20 0 68992 3396 1704 S 0.0 0.2 0:00.00 httpd
22226 nobody 20 0 68588 3300 1924 S 0.0 0.2 0:00.00 httpd
21154 nobody 20 0 68720 3172 1716 S 0.0 0.2 0:00.03 httpd
Update with free -m:
free -m
total used free shared buffers cached
Mem: 2048 1864 183 0 0 1063
-/+ buffers/cache: 800 1247
Swap: 2048 137 1910