Re: cache hit rates

On Thu, Jan 21, 1999 at 12:16:02PM -0500, Jon Zeeff wrote:

> Does anyone have data on the % of Internet web traffic that is
> cachable? Ie, an upper bound on what a perfect cache hit rate might
> be. Is it decreasing as more sites generate dynamic content?

I don't know about the "perfect" hit rate, but here are some stats
from one of my caches:

Count % Bytes % Status
------- ------- ---------------
   0.09 0.01 ERR
   0.09 0.01 TCP_DENIED

  40.94 19.68 HIT
  19.60 11.59 TCP_HIT
   7.78 0.28 TCP_IMS_HIT
   2.12 0.65 TCP_MEM_HIT
   0.35 0.03 TCP_NEGATIVE_HIT
  11.09 7.13 TCP_REFRESH_HIT

  58.96 80.30 MISS
  57.13 78.06 TCP_MISS
   1.84 2.24 TCP_REFRESH_MISS

That's over a 24-hour period with 535 hosts making 129082 queries.

-- 
Michael Fuhr
http://www.fuhr.net/~mfuhr/