tree 1f85f1869898b12a0743fb2f90543c98c21e52bd
parent 6f5ccb15896173fc12f4ea183b0fb2e35b185d84
author Willy Tarreau <w@1wt.eu> 1299795956 +0100
committer Willy Tarreau <w@1wt.eu> 1300050023 +0100
encoding latin1

[MEDIUM] stats: split frontend and backend stats

It's very annoying that frontend and backend stats are merged because we
don't know what we're observing. For instance, if a "listen" instance
makes use of a distinct backend, it's impossible to know what the bytes_out
means.

Some points take care of not updating counters twice if the backend points
to the frontend, indicating a "listen" instance. The thing becomes more
complex when we try to add support for server side keep-alive, because we
have to maintain a pointer to the backend used for last request, and to
update its stats. But we can't perform such comparisons anymore because
the counters will not match anymore.

So in order to get rid of this situation, let's have both frontend AND
backend stats in the "struct proxy". We simply update the relevant ones
during activity. Some of them are only accounted for in the backend,
while others are just for frontend. Maybe we can improve a bit on that
later, but the essential part is that those counters now reflect what
they really mean.