How to fix the Oracle error ORA-12832: Could not allocate slaves on all specified instances?

In this post, you’ll learn more about the Oracle ErrorORA-12832: Could not allocate slaves on all specified instances with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12832: Could not allocate slaves on all specified instances

Reason for the Error ORA-12832: Could not allocate slaves on all specified instances

After executing a query on a global v$ fixed view, one or more instances failed to allocate a slave to process query

How to fix the Error ORA-12832: Could not allocate slaves on all specified instances ?

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

To allow results to be returned by sucessfully allocated slaves, execute ALTER SESSION SET ALLOW_PARTIAL_SN_RESULTS=TRUE statement, or check parameters of instances