cache hit ratio
dbeckham-memcached at dealnews.com
Sat Jul 7 13:30:32 UTC 2007
When someone says "I have a memcached hit ratio of 90%" they are talking
about a ratio (http://en.wikipedia.org/wiki/Ratio) as it relates to the
total amount of hits+misses: (get_misses / (get_hits+get_misses)) *
100. e.g. If get_hits returns 900 and get_misses returns 100 we can
calculate the percentage of hits as related to the whole.
(900/(100+900)) * 100 = 90% of the memcached requests were hits.
Incidentally, this is a ratio of 9:1.
B. Keith Murphy wrote:
> Hello all,
> I have a question that might be dumb..but I have googled and skimmed
> through the mailing list not finding an answer. I have seen various
> postings saying something along the lines of "I have a memcached hit
> ratio of 90%". How is this determined?
> B. Keith Murphy
> Database Administrator
> 2635 Meridian Parkway, 2nd Floor
> Durham, North Carolina 27713
> (o) 919-433-0786
> (c) 850-637-3877
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