squid反向代理，Hot Object 少的可怜正常吗

e66478

Cache information for squid:
        Hits as % of all requests:      5min: 25.9%, 60min: 48.6%
        Hits as % of bytes sent:        5min: 36.3%, 60min: 40.0%
        Memory hits as % of hit requests:       5min: 14.7%, 60min: 16.5%
        Disk hits as % of hit requests: 5min: 64.3%, 60min: 72.0%
        Storage Swap size:      333616 KB
        Storage Swap capacity:   0.0% used, 100.0% free
        Storage Mem size:       3124 KB
        Storage Mem capacity:    0.6% used, 99.4% free
        Mean Object Size:       36.62 KB
        Requests given to unlinkd:      83


Internal Data Structures:
          9252 StoreEntries
           335 StoreEntries with MemObjects
           334 Hot Object Cache Items
          9109 on-disk objects

9千个缓存文件，只有300个热点，这个热点是什么意思，还有9252个文件是被缓存下来的文件，还是客户访问到的文件