In object-oriented programming, a memory leak happens when an object is stored in memory but cannot be accessed by the running code.
A memory leak,occurs when a computer program consumes memory but is unable to release it back to the operating system.The JVM reserves the heap as virtual memory on startup and doesn't gives that memory back until it exits. This virtual memory turns into main memory as it is used. This is why the virtual size and the resident size for a JVM can be very different and the resident memory can grow without the virtual memory changing.
The GC can always find every object on the heap, even those which are not reachable to the application. As such there is no object which is not reachable to running code.however, many people refer to any unwanted increase in memory usage as a memory leak,though this is not strictly accurate from a technical perspective.
In Java, the amount of memory required cannot be determined without a full GC. It is normal to see the "used" memory of a Java application sawtooth. Returning to the same amount of memory used after each GC indicates the memory required has not increased.
A memory leak can diminish the performance of the computer by reducing the amount of available memory. Eventually, in the worst case, too much of the available memory may become allocated and all or part of the system or device stops working correctly, the application fails, or the system slows down unacceptably due to thrashing.
A memory leak,occurs when a computer program consumes memory but is unable to release it back to the operating system.The JVM reserves the heap as virtual memory on startup and doesn't gives that memory back until it exits. This virtual memory turns into main memory as it is used. This is why the virtual size and the resident size for a JVM can be very different and the resident memory can grow without the virtual memory changing.
The GC can always find every object on the heap, even those which are not reachable to the application. As such there is no object which is not reachable to running code.however, many people refer to any unwanted increase in memory usage as a memory leak,though this is not strictly accurate from a technical perspective.
In Java, the amount of memory required cannot be determined without a full GC. It is normal to see the "used" memory of a Java application sawtooth. Returning to the same amount of memory used after each GC indicates the memory required has not increased.
A memory leak can diminish the performance of the computer by reducing the amount of available memory. Eventually, in the worst case, too much of the available memory may become allocated and all or part of the system or device stops working correctly, the application fails, or the system slows down unacceptably due to thrashing.
No comments:
Post a Comment