In a recent project we wanted to migrate a SharePoint 2010 sitecollection to 2013. But there was one site, that was huge. Even though we migrated it over night, the next day the migration process still was working. A deeper look into it showed, that all the huge lists had been migrated. But we didn’t think about the workflow history list. It had about 100000 items in it, first one created about 3 years ago. There where a lot of workflows on this site and every workflow wrote into this list.
So, for now on, every workflow I create has an own task and history list and I will use the information management policy.
For further and deeper information, read this very good article by Marj Palmer.The article or information provided here represents completely my own personal view & thought. It is recommended to test the content or scripts of the site in the lab, before making use in the production environment & use it completely at your own risk. The articles, scripts, suggestions or tricks published on the site are provided AS-IS with no warranties or guarantees and confers no rights.