I have 2 dedicated cache volumes 4gb+4Gb with 8kb block size..

Is there reason to change block size to 16 kb ? (See stats bellow)
And how to determine that i have enough cache volumes size ?
(my stats are cache1: used 91% dir entr. free 2 %
cache2: used 95% dir entr. free 6 % )

BM 3.7 sp3 + fp4e on nw6 sp5

Thanks,
Lab.

brdstats show this for last month (jul):
File size MB Hits
0-1K 290.91 694266
1-2K 298.13 225439
4-8K 757.23 138494
2-4K 318.09 114876
8-16K 959.78 88727
16-32K 1386.40 64422
32-64K 1372.08 32765
64-128K 933.07 11127
128-256K 337.22 2107
256-512K 320.88 934
512-1024K 210.45 299
1024-2048K 289.64 211
2048-4096K 345.77 132
4096-8192K 402.79 77
16384-32768K 805.73 37
8192-16384K 343.04 29
32768-65536K 509.57 12
65536-131072K 674.73 6
131072-262144K 700.70 5

Statistics generated by BRDSTATS 1.50a (20020308)