There has been lot of effort made in Qt 4.7.4 to improve the memory management. Applications using Qt 4.7.4 libraries normally consume less RAM than using earlier Qt libraries. Symbian platform uses predefined sizes for stacks and heaps. However, application developers need to be very careful on memory usage. If an application exceeds stack or heap limits, it may crash or fail to complete its task. Crashes that seem to have no reason can often be traced back to insufficient stack and/or heap sizes. Application developers should use reasonable values for maximum heap size. Either too small or too big value could cause the application’s failure. Other than RAM, there is very limited video/graphic memory of 32 MB especially in Symbian^3 and Symbian Anna devices (the new devices that shipped with Symbian Belle have four times larger GPU memory of 128 MB). It’s important that applications using large graphics resources follow graphic memory handling guidelines.