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-rw-r--r--doc/bird.sgml7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index 39dadaf2..ddad4d98 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -145,6 +145,13 @@ BIRD executable by configuring out routing protocols you don't use, and
<p>You can pass several command-line options to bird:
<descrip>
+ <tag><label id="argv-block">-B <m/exp/</tag>
+ allocate memory using 2^<cf/exp/ byte sized blocks;
+ if you're expecting high memory load, raise this to
+ reduce number of allocated memory pages. For a million routes
+ in one table, the recommended setting is 18.
+ Default is your system page size, typically 12 for 4096 bytes.
+
<tag><label id="argv-config">-c <m/config name/</tag>
use given configuration file instead of <it/prefix/<file>/etc/bird.conf</file>.