Set the max size of join order threshold to 12

Signed-off-by: NHaisheng Yuan <hyuan@pivotal.io>

depends/conanfile_orca.txt

 [requires]
-orca/v2.51.3@gpdb/stable
+orca/v2.51.4@gpdb/stable
 
 [imports]
 include, * -> build/include

gpAux/releng/releng.mk

@@ -121,7 +121,7 @@ sync_tools: opt_write_test /opt/releng/apache-ant
 	@echo "Resolve finished";
 
 ifeq "$(findstring aix,$(BLD_ARCH))" ""
-	LD_LIBRARY_PATH='' wget -O - https://github.com/greenplum-db/gporca/releases/download/v2.51.3/bin_orca_centos5_release.tar.gz | tar zxf - -C $(BLD_TOP)/ext/$(BLD_ARCH)
+	LD_LIBRARY_PATH='' wget -O - https://github.com/greenplum-db/gporca/releases/download/v2.51.4/bin_orca_centos5_release.tar.gz | tar zxf - -C $(BLD_TOP)/ext/$(BLD_ARCH)
 endif
 
 clean_tools: opt_write_test

src/backend/utils/misc/guc_gp.c

@@ -4629,7 +4629,7 @@ struct config_int ConfigureNamesInt_gp[] =
 			NULL
 		},
 		&optimizer_join_order_threshold,
-		10, 0, INT_MAX, NULL, NULL
+		10, 0, 12, NULL, NULL
 	},
 
 	{