How to fix the Oracle error PGA-20949: unable to define variable string for transaction recovery?

In this post, you’ll learn more about the Oracle ErrorPGA-20949: unable to define variable string for transaction recovery with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PGA-20949: unable to define variable string for transaction recovery

Reason for the Error PGA-20949: unable to define variable string for transaction recovery

Cause: The gateway server was unable to define variable to be used in accessing the transaction log table during recovery processing. An Oracle server message will follow this message.

How to fix the Error PGA-20949: unable to define variable string for transaction recovery ?

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

Action: Ensure that the Oracle server and its TNS listener are both operational. Also check the PGA_LOG_DB, PGA_LOG_USER, and PGA_LOG_PASS parameters in the gateway init file and ensure that they specify the correct database string, userid, and password, respectively. Refer to the Oracle Server Messages and Codes Manual for information on the Oracle server message.