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activeExpireCycle(): fix about fast cycle early start.

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We don't want to repeat a fast cycle too soon, the previous code was
broken, we need to wait two times the period *since* the start of the
previous cycle in order to avoid there is an even space between cycles:

.-> start                   .-> second start
|                           |
+-------------+-------------+--------------+
| first cycle |    pause    | second cycle |
+-------------+-------------+--------------+

The second and first start must be PERIOD*2 useconds apart hence the *2
in the new code.
This commit is contained in:
antirez 2013-08-06 12:59:04 +02:00
parent 6500fabfb8
commit 4befe73b60
1 changed files with 1 additions and 1 deletions
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src/redis.c
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@ -721,7 +721,7 @@ void activeExpireCycle(int type) {
* for time limt. Also don't repeat a fast cycle for the same period * for time limt. Also don't repeat a fast cycle for the same period
* as the fast cycle total duration itself. */ * as the fast cycle total duration itself. */
if (!timelimit_exit) return; if (!timelimit_exit) return;
if (start < last_fast_cycle + ACTIVE_EXPIRE_CYCLE_FAST_DURATION) return; if (start < last_fast_cycle + ACTIVE_EXPIRE_CYCLE_FAST_DURATION*2) return;
last_fast_cycle = start; last_fast_cycle = start;
} }