How to fix the Oracle error ORA-12800: system appears too busy for parallel query execution?

In this post, you’ll learn more about the Oracle ErrorORA-12800: system appears too busy for parallel query execution with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12800: system appears too busy for parallel query execution

Reason for the Error ORA-12800: system appears too busy for parallel query execution

load on system is too high to perform parallel queries.

How to fix the Error ORA-12800: system appears too busy for parallel query execution ?

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

re-execute serially or wait until system load is reduced.