problem s pamatou v apachi

ahojte

Mam 2 identicke apache servery (tie iste konfiguracne subory na oboch aj verzie su tie site). oba servery bezia na Centosoch ktore su skoro rovnake ale predsa sa odlisuju v najekych rpm.
Ked sa pozriem na TOP prikaz vydim tieto rozdielnosti na oboch serveroch:

server 1:
-----------
Tasks: 79 total, 1 running, 78 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.0%us, 3.0%sy, 0.0%ni, 96.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1035244k total, 985732k used, 49512k free, 168884k buffers
Swap: 2031608k total, 56k used, 2031552k free, 572548k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1812 apache 15 0 62812 13m 7516 S 1.0 1.3 1:06.92 httpd
18545 apache 16 0 63156 13m 7376 S 0.7 1.3 0:12.74 httpd
21154 apache 16 0 62812 13m 7224 S 0.7 1.3 0:04.76 httpd
30377 apache 23 0 62812 13m 7520 S 0.7 1.3 1:18.93 httpd



server 2:
----------
Tasks: 88 total, 2 running, 86 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.0%us, 2.0%sy, 0.0%ni, 96.7%id, 0.0%wa, 0.3%hi, 0.0%si, 0.0%st
Mem: 1035244k total, 1000408k used, 34836k free, 157928k buffers
Swap: 2031608k total, 56k used, 2031552k free, 557524k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
9180 apache 16 0 64372 25m 18m S 0.7 2.6 0:55.54 httpd
18408 apache 16 0 63092 25m 18m S 0.7 2.5 0:34.01 httpd
24512 apache 18 0 63180 24m 17m S 0.7 2.4 0:17.48 httpd
25253 apache 15 0 65992 27m 18m S 0.7 2.7 0:16.59 httpd



Na servery 1 kazdy httpd server skonzumuje len 13M pamati ale na servery 2 je to 25M. Vie mi niekto poradit co moze sposobovat tieto rozdiely?

dakujem