Question

I have a problem insert mongodb using vb.net.

Public Sub runMongoDBQuery(ByVal nameDatabase As String, ByVal nameCollection As String, ByVal queryBson As BsonDocument, ByVal serverString As String)


        Dim mongo1 As MongoServer = MongoServer.Create("mongodb://localhost/?safe=true") 
        mongo1.Connect()
        Dim db = mongo1.GetDatabase(nameDatabase)
        Dim collection1 = db(nameCollection) 
        collection1.Save(queryBson)// this is hang
        mongo1.Disconnect()


 End Sub

When I user this function, it run smoothly and suddenly hang.

It doesn’t throw exception but hang.

The problems run very rarely.

All the function did is saving queryBson

I will:

• Check content of queryBson
• Check log of mongodb server
• Update the question once I got more info

Answer 1

I managed to solve this problem by restarting mongodb and deleting the log. Thanks to Cirrus’s comment.

The log is 3GB and I strongly suspected it’s the culprit.

Such a high log is useless because text editor can’t open it anyway. Deleting the log without restarting mongodb causes a side effect where logs are no longer created.

I will soon ask another question how to limit log for mongodb, maybe on the database forum.

This question has a sequel:
https://dba.stackexchange.com/questions/25658/how-to-keep-mongodb-log-small