doc/release-notes: document new 'max open files' default

Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/doc/release-notes.rst b/doc/release-notes.rst
index c9c2d1b47a21aa9eb2c2cf83bca0da938531044e..aada531a33dbd826db9738e7f4a7b8c1a8ef1b1f 100644 (file)
--- a/doc/release-notes.rst
+++ b/doc/release-notes.rst
@@ -82,7 +82,6 @@ Please refer to the document Upgrading from Argonaut to Bobtail.
       done
 
 
-
 Compatibility changes
 ~~~~~~~~~~~~~~~~~~~~~
 
@@ -110,6 +109,16 @@ Compatibility changes
   copy remained. min_size = 1 could result in lower overall
   availability in certain cases, such as flapping network partitions.
 
+* The sysvinit start/stop script now defaults to adjusting the max
+  open files ulimit to 16384.  On most systems the default is 1024, so
+  this is an increase and won't break anything.  If some system has a
+  higher initial value, however, this change will lower the limit.
+  The value can be adjusted explicitly by adding an entry to the
+  ``ceph.conf`` file in the appropriate section.  For example::
+
+     [global]
+             max open files = 32768
+
 * 'rbd lock list' and 'rbd showmapped' no longer use tabs as
   separators in their output.