Looking at the aforementioned counter in PerfMon, we see that the number of pooled connections goes from zero to five within the ten second duration. NET Data Provider for SqlServer object: $SqlConnection1.Open() I put a two second sleep in between each connection opening just to see a gradual increase in the pooled connection count with the PerfMon counter NumberOfPooledConnections for all instances of the. Different connection strings, different connection pools. ![]() Note: Connection Pools are going to be defined by the connection strings that are passed. $SqlConnection5 = New-Object ($ConnectionString)Īll this does is instantiate the SqlConnection objects utilizing the same connection string that we defined above. $SqlConnection4 = New-Object ($ConnectionString) $SqlConnection3 = New-Object ($ConnectionString) $SqlConnection2 = New-Object ($ConnectionString) Now what we’re going to do is create five objects: $SqlConnection1 = New-Object ($ConnectionString) The above connection string is rather simple, but I am specifying the Application Name parameter so that we can easily parse sys.dm_exec_sessions in a below query to further prove connection pooling. I’ll start off by creating a connection string that my application will use to connect to the default instance on SQLBOX1: $ConnectionString = "data source=sqlbox1 initial catalog=master trusted_connection=true application name=ConnPoolTest" In my case, I’m going to use a PowerShell process to mimic this behavior. NET Data Provider for SQL Server (the namespace), but the ideas proposed should propagate to other popular providers used today.Īn application utilizes a provider to make connections to an instance of SQL Server. I will show an example of this below using the. The answer that enterprise DBAs need to be giving to these inquiries is that it is provider-specific. In other words, it is on the client/application side that connection pooling is handled. ![]() Far too often application teams, or network admins, or approach the DBA with questions regarding connection pooling, and whether or not it is functioning correctly or even happening. One of those aspects is connection pooling. ![]() There are a handful of questions that DBAs get in the wild that aren’t necessarily under the jurisdiction of the typical DBA.
0 Comments
Leave a Reply. |