[squid-users] Another squid log question (still from 2.6.STABLE18): TCP_HIT + DIRECT

[Henry S. Thompson]

In e.g. yesterday's log file, for 950K valid http requests, I find about
with 822K peer status DIRECT/...
Of these, those with squid status some variant of _HIT break down as
follows:

    115 TCP_HIT/200
     49 TCP_IMS_HIT/304
      8 TCP_MEM_HIT/200
  12880 TCP_REFRESH_HIT/200
     15 TCP_REFRESH_HIT/206
  14566 TCP_REFRESH_HIT/304

I understand the REFRESH cases, but what about the first three?  Under
what circumstances does a (non-REFRESH) cache hit none-the-less cause a
fetch to an origin server?

Thanks,

ht
-- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
      10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440
                Fax: (44) 131 650-4587, e-mail: ht at inf.ed.ac.uk
                       URL: http://www.ltg.ed.ac.uk/~ht/
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