rrdtool plugin: Fix flushing

[collectd.git] / src / collectd.conf.pod

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index f88430a..27acc99 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -6466,7 +6466,8 @@ one (exclusive).
 
 When the C<rrdtool> plugin uses a cache (by setting B<CacheTimeout>, see below)
 it writes all values for a certain RRD-file if the oldest value is older than
-(or equal to) the number of seconds specified. If some RRD-file is not updated
+(or equal to) the number of seconds specified by B<CacheTimeout>.
+That check happens on new values arriwal. If some RRD-file is not updated
 anymore for some reason (the computer was shut down, the network is broken,
 etc.) some values may still be in the cache. If B<CacheFlush> is set, then the
 entire cache is searched for entries older than B<CacheTimeout> seconds and
@@ -6475,6 +6476,10 @@ does nothing under normal circumstances, this value should not be too small.
 900 seconds might be a good value, though setting this to 7200 seconds doesn't
 normally do much harm either.
 
+Default value for this option is 10x of B<CacheTimeout>.
+If value of B<CacheFlush> less than value of B<CacheTimeout> then default value
+used too.
+
 =item B<CacheTimeout> I<Seconds>
 
 If this option is set to a value greater than zero, the C<rrdtool plugin> will