diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
new file mode 100644
index 639b288..026850a
*** a/doc/src/sgml/runtime.sgml
--- b/doc/src/sgml/runtime.sgml
*************** $ <userinput>sysctl -w vm.nr_hugepages=3
*** 1361,1366 ****
--- 1361,1373 ----
     </para>
  
     <para>
+     It is also necessary to give the database server operating system
+     user permission to use huge pages by setting
+     <varname>vm.hugetlb_shm_group</> via <application>sysctl</>, and
+     permission to lock memory with <command>ulimit -l</>.
+    </para>
+ 
+    <para>
      The default behavior for huge pages in
      <productname>PostgreSQL</productname> is to use them when possible and
      to fallback to normal pages when failing. To enforce the use of huge