How to fix the Oracle error ORA-09947: Unable to allocate connection attributes structure?

In this post, you’ll learn more about the Oracle ErrorORA-09947: Unable to allocate connection attributes structure with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-09947: Unable to allocate connection attributes structure

Reason for the Error ORA-09947: Unable to allocate connection attributes structure

ORACLE was not able to allocate the memory needed to hold the attributes of the SQL*Net connection. The “Additional Information” field holds the number of bytes that ORACLE attempted to allocate.

How to fix the Error ORA-09947: Unable to allocate connection attributes structure ?

You can fix this error in Oracle by following the below steps

Check the UNIX error number. It is probable that the system has run out of memory. If there is no error, contact ORACLE customer support.