improve CollectInternalStats's documentation

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

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index 1041f42..cabbb52 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -146,6 +146,18 @@ B<E<lt>PluginE<nbsp>...E<gt>> block acts as if it was immediately preceded by a
 B<LoadPlugin> statement. B<LoadPlugin> statements are still required for
 plugins that don't provide any configuration, e.g. the I<Load plugin>.
 
+=item B<CollectInternalStats> B<false>|B<true>
+
+When set to B<true>, various statistics about the I<collectd> daemon will be
+collected, with "collectd" as the I<plugin name>. Defaults to B<false>.
+
+The "write_queue" I<plugin instance> reports the number of elements currently
+queued and the number of elements dropped off the queue by the
+B<WriteQueueLimitLow>/B<WriteQueueLimitHigh> mechanism.
+
+The "cache" I<plugin instance> reports the number of elements in the value list
+cache (the cache you can interact with using L<collectd-unixsock(5)>).
+
 =item B<Include> I<Path> [I<pattern>]
 
 If I<Path> points to a file, includes that file. If I<Path> points to a
@@ -218,6 +230,14 @@ B<Warning:> You should set this once and then never touch it again. If you do,
 I<you will have to delete all your RRD files> or know some serious RRDtool
 magic! (Assuming you're using the I<RRDtool> or I<RRDCacheD> plugin.)
 
+=item B<MaxReadInterval> I<Seconds>
+
+Read plugin doubles interval between queries after each failed attempt
+to get data.
+
+This options limits the maximum value of the interval. The default value is
+B<86400>.
+
 =item B<Timeout> I<Iterations>
 
 Consider a value list "missing" when no update has been read or received for
@@ -268,8 +288,11 @@ If B<WriteQueueLimitHigh> is set to non-zero and B<WriteQueueLimitLow> is
 unset, the latter will default to half of B<WriteQueueLimitHigh>.
 
 If you do not want to randomly drop values when the queue size is between
-I<LowNum> and I<HighNum>, set If B<WriteQueueLimitHigh> and
-B<WriteQueueLimitLow> to same value.
+I<LowNum> and I<HighNum>, set B<WriteQueueLimitHigh> and B<WriteQueueLimitLow>
+to the same value.
+
+Enabling the B<CollectInternalStats> option is of great help to figure out the
+values to set B<WriteQueueLimitHigh> and B<WriteQueueLimitLow> to.
 
 =item B<Hostname> I<Name>