Use the Data Removal tool to erase unnecessary application data, such as expired journal articles and publication previews.
To remove data,
Open the Global Menu () and go to Control Panel → System Settings → Upgrades → Data Removal.
Select the data to remove:
Expired Journal Articles
Document Library Preview Change Tracking Store Content Data (Publications)
Published Change Tracking Store Content Data (Publications)
Only remove Published Change Tracking Store Content Data if you’re using a Liferay version before 7.3 U10 or 7.4 U37. After running the task, upgrade to prevent further accumulation of this unnecessary data.
Liferay immediately removes the selected data.