Performance of PI Dev system

We are in the middle of the project and over the last one week, the PI Development environment slows down. The SXMB_MONI and other ABAP based transactions are okay but it takes ages to open the IR objects. I think there is something wrong with the Java Engine memory etc. After the system is restarted it goes well for 5 to 6 hours and slows down considerably after that.

Has anybody encountered problems like this.

Can somebody suggest how to delete the Message ( both success and error ones ) from the Java engine ( Adapeter etc.,). I have a feeling the retry mechanism of error messages is taking up the memory of Java Engine.