I've noticed that when i purge my log files performance really picks up on our site (www.amazingfacts.org)

The scheduler doesn't seem to be purging the site log regularly so I've created the following sql statements and was planning to schedule them as a Job in sql server or a weekly basis or so.

But I'm not sure if this is the best approach.  Please advise.  Here's my sql ...

DELETE
FROM schedulehistory

DELETE
FROM sitelog

DELETE
FROM eventlog

--- We have a third party module to handle searching so we don't need or use DNN's built in functionality for that ... so this sql purges those tables ---

DELETE
FROM SearchItem

DELETE
FROM searchword

DELETE
FROM SearchItemWordPosition

DELETE
FROM searchitemword

Does this look ok or will running this cause significant problems elsewhere?