doc/install: Add note about default do_cmake.sh debug builds.

Signed-off-by: Mark Nelson <mnelson@redhat.com>

diff --git a/doc/install/build-ceph.rst b/doc/install/build-ceph.rst
index 3010909878ebb0d3b17d931e6edb282f3123a22d..147986e4c7d0c8127b6b634e40ecc9fefd108b59 100644 (file)
--- a/doc/install/build-ceph.rst
+++ b/doc/install/build-ceph.rst
@@ -32,6 +32,11 @@ repository and execute the following::
     cd build
     make
 
+.. note:: By default do_cmake.sh will build a debug version of ceph that may
+   perform up to 5 times slower with certain workloads. Pass 
+   '-DCMAKE_BUILD_TYPE=RelWithDebInfo' to do_cmake.sh if you would like to
+   build a release version of the ceph executables instead.
+
 .. topic:: Hyperthreading
 
        You can use ``make -j`` to execute multiple jobs depending upon your system. For