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From Alain RODRIGUEZ <>
Subject Re: are counters stable enough for production?
Date Tue, 18 Sep 2012 13:19:11 GMT
"The repair of taking the highest value of two inconsistent might cause
getting higher values?"

I guess so:

>From Sylvain Lebresne: '"Now what the code does to "repair" in that case is
to pick the higher of the two value it has. But honestly that's random, there's
a 50/50 chance that it will pick the right value."

So this repair has 50% chance to lead into an over-count.

"Maybe even much higher values if it takes place multiple times?"

I don't understand this bug very well. So I can't really answer this.
However, I never had over-counts that were so big that their were
unacceptable maybe because I got a few (from 0 to 30) of these errors every
day out of between hundred of thousandths and a few millions increments
every day.


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