Hanging dotnet application

Question

Hi all,
I am using ODP.NET for database connectivity with oracle and ODBC.NET for SQL server. webservice build in C#.NET hangs up if I leave my application Idle for 5 secs only or minimizes for a while. Prior to this I was using ODBC api for both dbs which also giving same result. Oracle.Access is looking slower than System.Data.ODBC for oracle. How can I increase performance using ODP.NET. IS there any way to do this or ODP.NET is slower than ODBC.NET. Please give me suggestions.
I am using base Interface to make connection and create command ----
IDbConnection conn = new OracleConnection(strConnectionString);
IDbCommand command = new OracleCommand(strQuery, conn);
Thanks
Dharmendra

Answer 1

> webservice build in C#.NET hangs up if I leave my application
Idle for 5 secs only or minimizes for a while
I once developed desktop VB.NET app using ODP.NET which hang if we left it idle, the source of problem is not in ODP.NET, but because of bad network connection between client and databse server, and bad application code. No offense, I am not judging that your code is bad.
you should get better performance when using ODP.NET. below is a test code,
static void Main(string[] args)
    PerfTest("System.Data.OracleClient");    // first try
    PerfTest("System.Data.OracleClient");    // second try
    PerfTest("System.Data.OracleClient");    // third try
    PerfTest("System.Data.Odbc");    // first try
    PerfTest("System.Data.Odbc");    // second try
    PerfTest("System.Data.Odbc");    // third try
    PerfTest("Oracle.DataAccess.Client");    // first try
    PerfTest("Oracle.DataAccess.Client");    // second try
    PerfTest("Oracle.DataAccess.Client");    // third try
private static void PerfTest(string provider)
    DateTime start, finish;
    DbProviderFactory factory = DbProviderFactories.GetFactory(provider);
    // get oracle start timestamp
    start = DateTime.Now;
    // run oracle command
    using (DbConnection cn = factory.CreateConnection())
        DbCommand cm;
        DbDataReader dr;
        string tempstr;
        if (provider == "System.Data.Odbc")
            cn.ConnectionString = "Dsn=XE;uid=hr;pwd=hr";
        else
            cn.ConnectionString = "Data Source=XE;user ID=hr;Password=hr";
        cn.Open();
        cm = cn.CreateCommand();
        cm.CommandText =
            "select a.employee_id, a.first_name, " +
            "       a.last_name, a.salary " +
            "from employees a, employees b";
        dr = cm.ExecuteReader();
        while (dr.Read())
            tempstr = dr.GetDecimal(0).ToString();
            tempstr = dr.GetString(1);
            tempstr = dr.GetString(2);
            tempstr = dr.GetDecimal(3).ToString();
        cn.Close();
    // get oracle end timestamp
    finish = DateTime.Now;
    // display oracle info
    Console.WriteLine("{0}: {1}", provider, finish - start);
}tested using VS2005, ODP.NET 10.2 and remote OracleXE database accessed using wireless LAN. Output should similar to this,
System.Data.OracleClient: 00:00:00.7343750
System.Data.OracleClient: 00:00:00.4531250
System.Data.OracleClient: 00:00:00.4531250
System.Data.Odbc: 00:00:00.4218750
System.Data.Odbc: 00:00:00.3906250
System.Data.Odbc: 00:00:00.3437500
Oracle.DataAccess.Client: 00:00:00.3437500
Oracle.DataAccess.Client: 00:00:00.1406250
Oracle.DataAccess.Client: 00:00:00.1406250NH