How to resolve ORA-01555 Error Message in Oracle database

Learn the cause and how to unravel the ORA-01555 error message in Oracle.

Description

When you encounter an ORA-01555 error, the following error message will appear:

ORA-01555: image too ancient (rollback segment too small)

Cause

This error can be precipitated with the aid of one of the problems, as described below.

Resolution

The option(s) to resolve this Oracle error are:

Option #1

This error can be the result of there being insufficient rollback segments.

A question may additionally now not be able to create the snapshot due to the fact the rollback data is no longer available. This can occur when there are many transactions that are editing data, and performing commits and rollbacks. Rollback data is overwritten when the rollback segments are too small for the size and range of modifications that are being performed.

To correct this problem, make extra large rollback segments available. Your rollback records for done transactions will be kept longer.

Option #2

This error can be the end result of programs now not closing cursors after repeated FETCH and UPDATE statements.

To correct this problem, make sure that you are closing cursors when you no longer require them.

Option #3

This error can appear if a FETCH is executed after a COMMIT is issued.

The variety of rollback data created due to the fact that the remaining CLOSE of your cursor will fill the rollback segments and you will commence overwriting until now records.