OracleConnection opening more than one session.

Question

Hi,
I am using ODP.NET 10.2 client, when i try to connect to Oracle database using OracleConnection object it is creating more than one session object.
I created one windows application, then i added the below code in form load event of the application
Please find the below code
string strConnection1 = "Persist Security Info=False;User ID=service1;Data Source=SD.World;Connection Lifetime=60;Max Pool Size=30;Min Pool Size=0;Pooling=true;PASSWORD=ases;";
string strConnection2 = "Persist Security Info=False;User ID=service1;Data Source=SD.World;Connection Lifetime=60;Max Pool Size=30;Min Pool Size=0;Pooling=true;PASSWORD=ASES;";
string strConnection3 = "Persist Security Info=False;User ID=service1_customer;Data Source=SD.World;Connection Lifetime=60;Max Pool Size=30;Min Pool Size=0;Pooling=true;PASSWORD=ases;";
OracleConnection con = new OracleConnection(strConnection1);
con.Open();
OracleConnection con1 = new OracleConnection(strConnection2);
con1.Open();
OracleConnection con2 = new OracleConnection(strConnection3);
con2.Open();
When i run the below Query
select * from V$session where PROGRAM='WindowsApplication7.vshost.exe'
I am getting 6 session. Please help me out in this regard.

Answer 1

The Error message was “Unable to open connection” once it reach the maximum session.
I agree for that, Previously I was not disposing that connection object. Presently I am using keyword to dispose the connection object.
Here I have doubt
In connection string the pooling attribute is true by default.
Scenario 1:
If I specify externally(through connection string it behaves very badly) like pooling=true in the connection string. It will create more than one session.
Scenario 2 :
If I donot specify pooling attribute in connection string it will create only one session and it will consume the same session for all the instance.
Below is the code snippet
Here is the example for scenario 2
private void button3_Click(object sender, EventArgs e)
//Connection string which donot have a pooling value.
string strConnection1 = "Persist Security Info=False;User ID= is_customer;Data Source=ISD.World;Connection Lifetime=60;Max Pool Size=30;Min Pool Size=0;PASSWORD=is;";
using(OracleConnection con = new OracleConnection(strConnection1))
con.Open();
MessageBox.Show(GetSID(con));
//con.Dispose();
using (OracleConnection con2 = new OracleConnection(strConnection1))
con2.Open();
MessageBox.Show(GetSID(con2));
//con2.Dispose();
Scenario 1 Example:
private void button7_Click(object sender, EventArgs e)
string strConnection1 = "Persist Security Info=False;User ID= is_customer;Data Source=ISD.World;Connection Lifetime=60;Max Pool Size=30;Min Pool Size=0;Pooling=true;PASSWORD=is;";
using (OracleConnection con = new OracleConnection(strConnection1))
con.Open();
MessageBox.Show(GetSID(con));
//con.Dispose();
using (OracleConnection con2 = new OracleConnection(strConnection1))
con2.Open();
MessageBox.Show(GetSID(con2));
//con2.Dispose();
GetSID is the function which is used to fetch the session of the connection string.
private string GetSID(OracleConnection con)
     OracleCommand cmd = new OracleCommand();
     cmd.Connection = con;
     cmd.CommandText = "select SYS_CONTEXT('USERENV','SID') from dual";
object sid = cmd.ExecuteScalar();
return Convert.ToString(sid);
In Scenario 2 example I will get only one session ID.
But in Scenarion 1 example I will get different session ID’s.
Please suggest what is the problem.
Message was edited by:
user476285