Question

Imports System.Data.SqlClient

Module Module1

    Sub Main()
        Dim iCount As Integer = 1
        Try
            Do
                Dim sqlConn As New  _
                SqlConnection("Data Source=localhost;trusted_Connection=yes;initial catalog = MyDatabase;max pool size =100;")
                sqlConn.Open()
                Trace.WriteLine("opening connection " & CStr(iCount))
                'sqlConn.Close()
                'Trace.WriteLine("closing connection " & CStr(iCount))
                'sqlConn.Dispose()
                'Trace.WriteLine("disposing connection " & CStr(iCount))
                iCount = iCount + 1
            Loop Until iCount > 20000
        Catch ex As Exception
            Trace.WriteLine(ex.ToString)
        End Try
    End Sub

End Module

如果我执行此代码，此测试应用程序会在引发The timeout period elapsed prior to obtaining a connection from the pool异常之前打开115个与数据库的连接。但是应用程序池中只有100个连接。怎么可能？

Answer 1

猜猜：既然您没有持有对开放连接对象的引用，那么前15个可能会被处置并重用？如果你将连接推到List<>上，你还能得到115吗？

.net中的连接池

1 个答案: