Hi there, I am working on building a cache with squid 3.1.9. I've got two machine with 4G ram and two 500G disk each. I want to make cache as large as possible to maximize utilization of my two big disk. However, I soon found out I am being extremely limited by memory. lots of swapping starts to happen when my cache exceed 9M objects. Also everytime I want to restart cache, it would spend a hour just to rescan all the entities into memory. and it just keep taking longer. And From iostat -x -d , my two disk utilization is often below 5% during scan and serving, which is kind of a waste. from some doc, I found statement that squid needs 14M (on 64 bit) for each 1G on disk. If that's the case, to fill 500G disk I would need ~8G ram just to hold the metadata. So my question is: 1. Is this statement true? Can squid somehow lookup directly on the disk to imporve disk utilization and reduce memory needs? 2. How big the cache people usually have? I think having a 500G cache will definitely improve hit ratio and byte hit ratio, is that true? 3. what other optimization is needed for building huge cache? Thanks in advance.
