ZODB.Architecture.Connection.sync
Documentation
Synchronize the connection with saved data. Any pending changes on the connection and any other conection are aborted.
This method is useful in long-running interactive sessions to see the effects of other sessions.
Sample
You can establish a database connection using the ZServer monitor client to query the value of persistent ojects withot shutting down the Zope process:
import Zope
app=Zope.app()
... Time goes by and changes are made
app._p_jar.sync()