# ZCatalog>Status

This view allows you to control advanced catalog features.

Subtransactions reduce the memory requirements of ZCatalog, but at the expense of speed. If you choose to enable subtransactions, you can adjust how often ZCatalog commits a subtransactions by adjusting the threshold. The index status reports how many objects are cataloged in each index.

If substransactions are disabled you can enable them by clicking the `Enable` button. If subtransactions are enabled you can disable them by clicking the `Disable` button. If subtransactions are enabled you can set the subtransaction threshold by specifying the threshold in the text field and clicking the `Change` button.