memory usage from top...can't seem to account for totals (is it normal?)

[Walter Tautz <wtautz@math.uwaterloo.ca>]

quite a bit of it seems to be in buffers

$ free
             total       used       free     shared    buffers     cached
			 Mem:        257928     191744      66184      35584     122628
			 38364
			 -/+ buffers/cache:      30752     227176
			 Swap:       530104          0     530104
			 

and top sorted according to memory usage: 

(IS this normal?)


 12:51:09 up 13 days,  5:06,  1 user,  load average: 0.08, 0.02, 0.00
33 processes: 32 sleeping, 1 running, 0 zombie, 0 stopped
CPU states:   0.0% user,   0.4% system,   0.0% nice,  99.6% idle
Mem:    257928K total,   191868K used,    66060K free,   122628K buffers
Swap:   530104K total,        0K used,   530104K free,    38356K cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
11225 root       0   0  7196 7192  6556 S     0.0  2.7   0:00 kdm
  240 root     -10 -10 22716 5628  1692 S <   0.0  2.1  12:48 XFree86
  205 root       0   0  4596 4588  4280 S     0.0  1.7   0:00 kdm
  184 root       0   0  3044 3044   628 S     0.0  1.1   0:00 xfs
 6049 www-data   0   0  2188 2188  2108 S     0.0  0.8   0:00 apache-ssl
 6050 www-data   0   0  2188 2188  2108 S     0.0  0.8   0:00 apache-ssl
 6051 www-data   0   0  2188 2188  2108 S     0.0  0.8   0:00 apache-ssl
 6052 www-data   0   0  2188 2188  2108 S     0.0  0.8   0:00 apache-ssl
 6053 www-data   0   0  2188 2188  2108 S     0.0  0.8   0:00 apache-ssl
11263 root       2   0  1852 1852  1568 S     0.1  0.7   0:00 sshd
11264 wtautz     6   0  1364 1360  1052 S     0.0  0.5   0:00 bash
  181 root       0   0  1236 1236  1108 S     0.0  0.4   0:02 sshd
  222 bin        0   0  1008 1008   616 S     0.0  0.3   0:00 rmand
11296 wtautz    12   0   988  988   784 R     0.1  0.3   0:00 top
  162 root       0   0   800  800   440 S     0.0  0.3   0:00 klogd
 6009 www-data   0   0   792  792   644 S     0.0  0.3   0:00 gcache
  190 root       0   0   708  708   580 S     0.0  0.2   0:00 cron
  159 root       0   0   608  608   492 S     0.0  0.2   0:00 syslogd
  187 daemon     0   0   600  600   520 S     0.0  0.2   0:00 atd
  171 root       0   0   556  556   480 S     0.0  0.2   0:00 inetd
    1 root       0   0   520  520   452 S     0.0  0.2   0:05 init
  234 root       0   0   500  500   436 S     0.0  0.1   0:00 getty
  236 root       0   0   500  500   436 S     0.0  0.1   0:00 getty
  237 root       0   0   500  500   436 S     0.0  0.1   0:00 getty
  238 root       0   0   500  500   436 S     0.0  0.1   0:00 getty
  239 root       0   0   500  500   436 S     0.0  0.1   0:00 getty
    2 root       0   0     0    0     0 SW    0.0  0.0   0:00 kflushd
    3 root       0   0     0    0     0 SW    0.0  0.0   0:00 kupdate
    4 root       0   0     0    0     0 SW    0.0  0.0   0:00 kswapd
    5 root       0   0     0    0     0 SW    0.0  0.0   0:00 keventd
   35 root       0   0     0    0     0 SW    0.0  0.0   0:00 khubd