I installed Oracle 10g on Windows 2003 SP1 Server (Intel Xeon 2.40Ghz,4GB RAM). When I ran 200 virtual users to...
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connect to the Oracle DB using the TPC-C Job, it finished successfully without any error. When I ran 300 virtual users, it gave me the error: "Unable to attach to a server in logon().ORA-12518: TNS:listener could not hand off client connection. Could not logon to the server. " I have tried DIRECT_HANDOFF_TTC_LISTENER = OFF in the listener.ora file. Still the same problem. Please help me.
This type of error usually points to a resource issue. If you are using dedicated connections to your database, increase the number of processes. Note that you may also have to adjust other parameters, as well (e.g., sessions, etc.). If you are using shared server, increase the number of dispatchers.
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