* Add utility functions to allocate pointers in variable size chunks.

[rrdtool.git] / doc / rrdcached.pod

diff --git a/doc/rrdcached.pod b/doc/rrdcached.pod
index d6bfec3..57eb655 100644 (file)
--- a/doc/rrdcached.pod
+++ b/doc/rrdcached.pod
@@ -19,6 +19,7 @@ B<rrdcached>
 [-F]
 [-g]
 [B<-b>E<nbsp>I<base_dir>E<nbsp>[B<-B>]]
+[B<-m>E<nbsp>I<alloc_size>]
 
 =head1 DESCRIPTION
 
@@ -233,6 +234,14 @@ Only permit writes into the base directory specified in B<-b> (and any
 sub-directories).  This does B<NOT> detect symbolic links.  Paths
 containing C<../> will also be blocked.
 
+=item B<-m> I<alloc_size>
+
+Allocate value pointers in chunks of I<alloc_size>.  This may improve CPU
+utilization on machines with slow C<realloc()> implementations, in
+exchange for slightly higher memory utilization.  The default isE<nbsp>1.
+Do not set this more than the B<-w> value divided by your average RRD step
+size.
+
 =back
 
 =head1 AFFECTED RRDTOOL COMMANDS