15000个到sql server 2008的连接处于“休眠”状态

Question

I have set pooling=false in my connection string and i check in my sql server 2008 there is 15000 connection is in sleeping status. I cannot understand why this is happen. My server is freeze. Need some help to resolve it. Thanks a lot.

Answer 1

I assume the reason is that you've set pooling=false . You should always close the connections in your code best by using the using -statement:

using(var myCon = new SqlConnection("Connection-String"))
{
    myCon.Open();
    // ....
} // will be closed automatically

If you would use Connection-Pooling you could "close" the connection without having the underlying physical connection really being closed. That's managed by the pool. If you don't use it you have to manage it yourself. If you don't close connections they will keep sleeping .

SQL Server Sleeping Status and Connection Pooling

Why have you disabled it at all? My advice is: if there is no compelling reason against, enable it again.

Answer 2

sleeping means it's waiting for its next command from the application or client and in sleep state it isn't using any resources.

SQL Server by itself will not kill any connection/process unless the service is initiated for a restart.

You can do a restart of the SQL Server Service in case you want to start afresh but in production that may not be the option cause it will incur downtime.

(OR) you can kill those inactive process manually as mentioned by @Remush.

use sp_who or sp_who2 which will list out the PIDS then use kill PID