Steve Ebersole ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMThhMDljNjlh... ) / Task ( https://hibernate.atlassian.net/browse/HHH-16357?atlOrigin=eyJpIjoiMThhMD... ) HHH-16357 ( https://hibernate.atlassian.net/browse/HHH-16357?atlOrigin=eyJpIjoiMThhMD... ) Clean up EntityPersister and CollectionPersister state ( https://hibernate.atlassian.net/browse/HHH-16357?atlOrigin=eyJpIjoiMThhMD... ) Change By: Steve Ebersole ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) A lot of state (memory wise) held in the persisters is related to the legacy approach of building SQL strings via concatenation (aka, not SQL AST).  Most of those usages have been converted to using SQL AST instead so the state is unnecessary.  Go back and look for any such state that we can prune. See the preliminary [deprecation issue|https://hibernate.atlassian.net/browse/HHH-16407] ( https://hibernate.atlassian.net/browse/HHH-16357#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16357#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100219- sha1:6a6077b )