Filesystem Caching with Linux 2.6

[Andrew Miehs <andrew@2sheds.de>]

Dear List

I was wondering if anyone knows of any settings to control caching  
under Linux 2.6

The output below is from one of my web servers that ONLY delivers  
static content.

I have a lot of 'free' memory on this box - Is there anyway I can  
improve the file
system caching?

procs -----------memory---------- ---swap-- -----io---- --system--  
----cpu----
r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us  
sy id wa
0  1      0 1646656 405900 1295528    0    0   305    51 3218   988   
3  3 72 21
0  1      0 1647184 405396 1295624    0    0   266     0 3276   984   
3  4 73 21
0  0      0 1645816 406004 1296444    0    0   241    11 3274  1233   
3  4 76 17
0  0      0 1647528 404984 1295764    0    0   196     0 3184  1366   
3  4 81 12
0  1      0 1645928 405604 1296708    0    0   279     6 3328  1102   
3  4 72 21


Any comments appreciated...

Thanks

Andrew