Mongo C# 驱动程序指标

Question

We're having problems with connection pooling and the wait queue with mongo using the mongo c# driver.

Is there any way to get metrics from the MongoClient at all? Things like number of active connections, size of connection pool, size of wait queue etc.

Answer 1

There are loads of connection pool events that you can subscribe to which might help you. These are:

• ConnectionPoolCheckingOutConnectionEvent
• ConnectionPoolCheckedOutConnectionEvent
• ConnectionPoolCheckingOutConnectionFailedEvent
• ConnectionPoolCheckingInConnectionEvent
• ConnectionPoolCheckedInConnectionEvent
• ConnectionPoolAddingConnectionEvent
• ConnectionPoolAddedConnectionEvent
• ConnectionPoolOpeningEvent
• ConnectionPoolOpenedEvent
• ConnectionPoolClosingEvent
• ConnectionPoolClosedEvent
• ConnectionPoolClearingEvent
• ConnectionPoolClearedEvent
• ConnectionCreatedEvent

You can subscribe to these when you setup the MongoClient

    var mongoClientSettings = MongoClientSettings.FromUrl(new MongoUrl("mongodb://localhost"));

    mongoClientSettings.ClusterConfigurator = clusterConfigurator =>
    {
        clusterConfigurator.Subscribe<ConnectionPoolCheckingOutConnectionEvent>(e =>
        {
            
        });
    };

    var mongoClient = new MongoClient(mongoClientSettings);