SERVER-10026 centralize query heuristic numbers

1 files changed, 53 insertions, 0 deletions

diff --git a/src/mongo/db/query/query_knobs.cpp b/src/mongo/db/query/query_knobs.cpp
new file mode 100644
index 00000000000..3565d5a219c
--- /dev/null
+++ b/src/mongo/db/query/query_knobs.cpp
@@ -0,0 +1,53 @@
+/**
+ *    Copyright (C) 2014 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/db/query/query_knobs.h"
+#include "mongo/db/server_options.h"
+#include "mongo/db/server_parameters.h"
+
+namespace mongo {
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryPlanEvaluationWorks, int, 100);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryCacheSize, int, 200);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryCacheFeedbacksStored, int, 20);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryCacheStdDeviations, double, 2.0);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryCacheWriteOpsBetweenFlush, int, 1000);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryPlannerMaxIndexedSolutions, int, 6);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryEnumerationMaxIntersectPerAnd, int, 3);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryForceIntersectionPlans, bool, false);
+
+    MONGO_EXPORT_SERVER_PARAMETER(internalQueryPlannerEnableIndexIntersection, bool, true);
+
+}  // namespace mongo