SERVER-13374 change connection pool defaults

1 files changed, 75 insertions, 0 deletions

diff --git a/src/mongo/db/conn_pool_options.cpp b/src/mongo/db/conn_pool_options.cpp
new file mode 100644
index 00000000000..0ac2c985920
--- /dev/null
+++ b/src/mongo/db/conn_pool_options.cpp
@@ -0,0 +1,75 @@
+/**
+ *    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/conn_pool_options.h"
+
+#include "mongo/base/init.h"
+#include "mongo/db/server_parameters.h"
+#include "mongo/client/connpool.h"
+#include "mongo/s/shard.h"
+
+namespace mongo {
+
+    int ConnPoolOptions::maxConnsPerHost(200);
+    int ConnPoolOptions::maxShardedConnsPerHost(200);
+
+    namespace {
+
+        ExportedServerParameter<int> //
+        maxConnsPerHostParameter(ServerParameterSet::getGlobal(),
+                                 "connPoolMaxConnsPerHost",
+                                 &ConnPoolOptions::maxConnsPerHost,
+                                 true,
+                                 false /* can't change at runtime */);
+
+        ExportedServerParameter<int> //
+        maxShardedConnsPerHostParameter(ServerParameterSet::getGlobal(),
+                                        "connPoolMaxShardedConnsPerHost",
+                                        &ConnPoolOptions::maxShardedConnsPerHost,
+                                        true,
+                                        false /* can't change at runtime */);
+
+        MONGO_INITIALIZER(InitializeConnectionPools)(InitializerContext* context) {
+
+            // Initialize the sharded and unsharded outgoing connection pools
+            // NOTES:
+            // - All mongods and mongoses have both pools
+            // - The connection hooks for sharding are added on startup (mongos) or on first sharded
+            //   operation (mongod)
+
+            pool.setName("connection pool");
+            pool.setMaxPoolSize(ConnPoolOptions::maxConnsPerHost);
+
+            shardConnectionPool.setName("sharded connection pool");
+            shardConnectionPool.setMaxPoolSize(ConnPoolOptions::maxShardedConnsPerHost);
+
+            return Status::OK();
+        }
+    }
+
+}