Database Tuning (MOSC)

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Identifying the right max proceesses value

in Database Tuning (MOSC) 3 comments

Hello everyone.

We've got a RAC installation over oracle linux. Sometimes, the main app using this database experience the following errors:

Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: Cannot get Connection from Datasource: java.sql.SQLException: ora-12516 tns listener could not find available handler with matching protocol stack

Or


Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: Cannot get Connection from Datasource: java.sql.SQLException:r

ORA-12520: TNS:listener could not find available handler for requested type of server



We've noticed that there are lots, like 12k, of TIME-WAIT processes on both servers of the RAC. As well, we've performed an increase in the maximum number of procesess by:

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