As you may know in any of the 7.x variants of XenApp there is 3 types of potential databases that can be setup as part of your XenApp site, they are:
I) Site database – containing information relating to the objects in your XenApp 7.x site
II) Logging database – containing information relating to historical changes made in the
III) Monitoring database– containing desktop director information
By default all the information from above is held in one database, the site database.
To move logging and monitoring off to their own databases its very very straightforward simply click on the relevant datastore in the Databases section within the Studio console and choose Change Database from under the actions pane