What is snapshot in report?

What is snapshot in report?

In this article A report snapshot is a report that contains layout information and query results that were retrieved at a specific point in time. Unlike on-demand reports, which get up-to-date query results when you select the report, report snapshots are processed on a schedule and then saved to a report server.

What is a report snapshot in Salesforce?

A reporting snapshot lets you report on historical data. They can then schedule when to run the report to load the custom object’s fields with the report’s data. Reporting snapshots enable you to work with report data similarly to how you work with other records in Salesforce.

When does a snapshot too old error occur?

If the undo segment name is null ORA-01555: snapshot too old: rollback segment number # with name “???” too small If the segment_name or the undo segment is known the error is occurring with an UNDO segment. Why would one think that the transaction slot’s time has exceeded UNDO_RETENTION?

Why is my ora-01555 snapshot too old?

This message appears as a result of an Oracle read consistency mechanism. While your query begins to run, the data may be simultaneously changed by other people accessing the data. Oracle cannot access the original copy of the data from when the query started, and the changes cannot be undone by Oracle as they are made.

What causes the rollback data to be overwritten?

The modified data by performed commits and rollbacks causes rollback data to be overwritten when the rollback segments are smaller in size and number of the changes being performed at the time. To resolve this issue, either increase the parameter of UNDO_RETENTION if you are in AUM mode or use larger rollback segments.

How to reduce the duration of a snapshot?

The best solution is to tune the query can to reduce its duration. If that cannot be done then increase NOTE 1: Increasing UNDO_RETENTION requires additional space in the UNDO tablespace. Make sure to accommodate for this space. One method of doing this is to set AUTOEXTEND on one or