rrdtool plugin: Raise interval of random_variation to match documentation

Documentation states what the actual timeout for each value is chosen randomly
between <CacheTimeout>-<RandomTimeout> and <CacheTimeout>+<RandomTimeout>.

The implementation did not match this.

diff --git a/src/rrdtool.c b/src/rrdtool.c
index 2a1a569888bd2fc6b100b2dd9e392d6356533d21..84fcceff9d76d3217ad0dbc110a8ca6ec9ee9953 100644 (file)
--- a/src/rrdtool.c
+++ b/src/rrdtool.c
@@ -605,9 +605,6 @@ static int rrd_cache_flush_identifier(cdtime_t timeout,
 } /* int rrd_cache_flush_identifier */
 
 static int64_t rrd_get_random_variation(void) {
-  long min;
-  long max;
-
   if (random_timeout == 0)
     return (0);
 
@@ -618,10 +615,7 @@ static int64_t rrd_get_random_variation(void) {
     random_timeout = cache_timeout;
   }
 
-  max = (long)(random_timeout / 2);
-  min = max - ((long)random_timeout);
-
-  return ((int64_t)cdrand_range(min, max));
+  return (int64_t)cdrand_range(-random_timeout, random_timeout);
 } /* int64_t rrd_get_random_variation */
 
 static int rrd_cache_insert(const char *filename, const char *value,