Q

ORA-12518: TNS:listener could not hand off client connection

When I ran 300 virtual users to connect to the Oracle DB using the TPC-C Job, I got 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 installed Oracle 10g on Windows 2003 SP1 Server (Intel Xeon 2.40Ghz,4GB RAM). When I ran 200 virtual users to

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.

This was first published in December 2006

Dig deeper on Oracle database installation, upgrades and patches

Pro+

Features

Enjoy the benefits of Pro+ membership, learn more and join.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

1 comment

Oldest 

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

SearchDataManagement

SearchBusinessAnalytics

SearchSAP

SearchSQLServer

TheServerSide

SearchDataCenter

SearchContentManagement

SearchFinancialApplications

Close