oh,but I limited the max size of the object that can be cached to 1024 KB. and ,I set to 70% of the disk size ,it will ok? 2006/8/9, Adrian Chadd <adrian@xxxxxxxxxxxxxxx>:
On Wed, Aug 09, 2006, Odhiambo WASHINGTON wrote: > * On 09/08/06 10:51 +0800, huang mingyou wrote: > | hello,list > | I want add a 5.6G disk into my squid cache_dir,and I fond > | that the squid.conf say that if you want use entire disk,you need set > | 20% size of that disk.Don NOT use the size of that disk. > | But, Why? :-) It boils down to fragmentation. If you use most (80-100%) of your disk then when you run the disk at capacity it won't be able to allocate objects anywhere near as optimally as it can when the disk is at least half empty. The biggest thing that'll hit your performance is fragmentation. That said, 20% is a bit silly. I'd go with ~50-70%. Anything more and you definitely are asking for trouble. Adrian
-- Huang Mingyou
