MongoDB/C#驱动程序和内存问题

我正在使用MongoDB 1.8.2(Debian)和mongo-csharp-driver 1.1.0.4184(IIS 7.5/.Net 4.0 x64).

在现有集合中每秒插入多个项目,其中包含~3,000,000个对象(~1.9 GB).
每次插入后,WebServer内存增加约1 MB - >这导致内存使用速度超过2 GB.
内存永远不会释放,只有应用程序池回收可以释放内存.

有任何想法吗？

MongoServer server = MongoServer.Create(mongoDBConnectionString);
MongoDatabase database = server.GetDatabase(dbName);                

MongoCollection resultCollection = database.GetCollection("Result");
resultCollection.Insert(result);

结果看起来像

private class Result
{
    public ObjectId _id { get; set; }            
    public DateTime Timestamp { get; set; }
    public int Location { get; set; }            
    public string Content { get; set; }
}

更新:

我的问题不是插入,它是选择 - 对不起奇怪的代码库进行调查;-)

我用这个示例代码复制了它:

Console.WriteLine("Start - " + GC.GetTotalMemory(false).ToString("#,###,##0") + " Bytes");

for (int i = 0; i < 10; i++)
{
    MongoServer server = MongoServer.Create(mongoDBConnectionString);
    MongoDatabase database = server.GetDatabase(dbName);

    MongoCollection resultCollection = database.GetCollection("Result");
    var query = Query.And ( Query.EQ("Location", 1), Query.GTE("Timestamp", DateTime.Now.AddDays(-90)) );

    MongoCursor cursor = resultCollection.FindAs(query);

    foreach (Result result in cursor)
    {
        // NOOP
    }

    Console.WriteLine(i + " - " + GC.GetTotalMemory(false).ToString("#,###,##0") + " Bytes");
}

从.Net 4.0 控制台应用程序输出10.000导致光标:

Start - 193.060 Bytes
0 - 12.736.588 Bytes
1 - 24.331.600 Bytes
2 - 16.180.484 Bytes
3 - 13.223.036 Bytes
4 - 30.974.892 Bytes
5 - 13.335.236 Bytes
6 - 13.439.448 Bytes
7 - 13.942.436 Bytes
8 - 14.026.108 Bytes
9 - 14.113.352 Bytes

具有相同10.000 的.Net 4.0 Web应用程序的输出结果为光标:

Start - 5.258.376 Bytes 
0 - 20.677.816 Bytes
1 - 29.893.880 Bytes
2 - 43.783.016 Bytes
3 - 20.921.280 Bytes
4 - 34.814.088 Bytes
5 - 48.698.704 Bytes
6 - 62.576.480 Bytes
7 - 76.453.728 Bytes
8 - 90.347.360 Bytes
9 - 104.232.800 Bytes

结果:

Bug被报告给10gen,他们将在版本> = 1.4(他们目前在1.2上工作)修复它!