Eduardo Pivaral shows that you should clear out some of the bigger SSIS tables occasionally:
If you have SQL Server Integration Services installed on your server, and you left the default configurations a table named sysssislog is created on MSDB database, it contains logging entries for packages executed on that instance.
If you are not careful enough, this table can grow uncontrollably over time and can make subsequent insertions very slow.
This kind of batched delete works for more than just the Integration Services tables; it’s a good plan wherever you have a large table and need to delete a fairly significant number of records from it.