Acquisition slows down after a while with micro-manager 2.0


I am using Micro-manager 2.0 for 24 hour live imaging. Acquisition slows down few hours later. It is quite random (some times it is after 10 hours, sometimes after 22 hours). System memory is 32 GB, and 24 GB is allocated to Imagej. Data is saved at a rate of 8.4GB/hour. When the acquisition is slow, java takes up ~13GB of memory while computer memory usage is around 24GB. And Micro-manager is stuck and need to restart again. So it is hard to send the log report. Could anyone help?