manage(release) traces and logs of EM

Oracle 11.1.0.7.PSU7

I'm wondering that a lot of trace- and log-files exists from EM. Exists any automatism that release this files, perhaps like the policy of adrci? Or have I manage this with own jobs?

Here a list of the existing trace- and log-files:

emagent.log           emoms.trc.2           emoms.trc.8
emagent.trc           emoms.log             emoms.trc.3           emoms.trc.9
emagent.trc.1        emoms.log.1           emoms.trc.4           emagent.trc.2         emoms.trc             emoms.trc.5          

emagent.trc.3         emoms.trc.1           emoms.trc.6           emagent.trc.4         emoms.trc.10          emoms.trc.7      

Thaning for any answer ,

Brigitte