doc: add notice about the number of workers

groonga · Apr 26, 2017 · c4552f4 · c4552f4
1 parent 6e47d34
commit c4552f4
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/doc/text/configuration.md b/doc/text/configuration.md
@@ -21,6 +21,12 @@ Here is recommended parameter in `system` directive:
 
     * default: `1`
 
+Note that there is one exception about the number of recommended
+workers.  Users should use `1` worker if command contains DDL (
+`table_create` and `column_create` and so on) because
+execution order of these command may be swapped. In such a case,
+replication will fail.
+
 Here are available parameters in `source` directive:
 
   * `protocol`: It specifies protocol for receiving Groonga commands.