Post date: Aug 02, 2015 3:0:20 PM
1. Settings > applications > Media Storage > clear data, force stop and reboot.\
2. adb shell
cd /sdcard/DCIM/.thumbnails
rm *
3. adb shell
su
top | grep media
lsof | grep media_rw
for more go to
http://geeknizer.com/fix-android-media-server-scanner-sdcard-cpu-battery-drain/