# Viewing catalog-level optimizations
<a name="view-catalog-optimizations"></a>

 When catalog-level table optimization is enabled, anytime an Apache Iceberg table is created or updated via the `CreateTable` or `UpdateTable` APIs through Amazon Web Services Management Console, SDK, or Amazon Glue crawler, an equivalent table level setting is created for that table. 

 After you create or update a table, you can verify the table details to confirm the table optimization. The `Table optimization` shows the `Configuration source` property set as `Catalog`. 

![An image of an Apache Iceberg table with catalog-level optimization configuration has
 been applied.](http://docs.amazonaws.cn/en_us/glue/latest/dg/images/catalog-optimization-enabled.png)