我每隔几天就会在 IIS7 和 SQL 2008 服务器之间收到超时错误。我得到的错误信息是：
System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.
有时这会自行解决，有时我需要手动重新启动 SQL Server。有什么办法可以追踪这个错误的原因。我 90% 确定它在没有我们的 ASP.NET webforms 应用程序的某个地方打开而不是关闭连接，但我无法确定原因。