Sysdatabaselog increases daily by 50 MB

Hello together,

we have in our Microsoft Dynamics AX 2009 the following problem:

• We've made some settings in the sysdatabaselog for the processes we'd like to historicize
• We only historicize processes that we have to retrace.
• Nonetheless our Sysdatabaselog increases by 50 - 60 MB daily

Does anyone have a suggestion how we can reduce our Database log? (Outsource, shrink,...)

Maybe there's a functionality in the standard of AX?

I'm looking forward to your answers.