Default [Q] Micromax A111 coredump problem

My Micromax A111 was running perfectly until one day it became slow and started to hang.

It is a rooted one. My phone froze and stopped running . Then I started taking out the battery and tried still did not work. It paused at CANVAS logo screen.

After some time I realized that in my "sdcard1" phone storage goes 100% . I found that files of 150 mb plus are getting stored in a folder named.
"coredump"....It goes Full and I have to manually empty it to keep my phone from freezing. Please help.