As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.
Each job has it's own logging. You can use org.quartz to enable logging for the triggering mechanisms, otherwise you have to enable logging for each job.
log4j.logger.org.alfresco.repo.content.cleanup.ContentStoreCleaner=DEBUG