ORA-18 ORA-604 Making New Connections to Database
(Doc ID 1036728.6)
Last updated on MARCH 07, 2019
Applies to:Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
You receive the following errors when trying to make new connections:
Cause: An error occurred while processing a recursive SQL statement.
(a statement applying to internal dictionary tables).
Action: If the situation described in the next message on the stack can be corrected, do so; otherwise, contact customer support.
Cause: An operation requested a resource that was unavailable.
The maximum number of sessions is specified by the initialization parameter SESSIONS.
When this maximum is reached, no more requests are processed.
Action: Try the operation again in a few minutes. If this message occurs often, shut down Oracle, increase the SESSIONS parameter in the initialization parameter file, and restart Oracle.
NOTE: No new connections are permitted to the database.
Selecting count(*) from V$SESSION returns a value that is less than the current setting of the SESSIONS parameter which is either derived (default) or specifically set in the "init.ora".
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