Menu
What is difference between 'Shared Object Memory' and 'Heap Memory' in Java. Is it like 'Shared Object Memory' is superset of 'Heap Memory'?
The source of this question is documentation of jmap. It provides different options to Print 'Shared Object Memory' and 'Heap Memory'.
660
Heap — This segment contains all memory dynamically allocated by a process. Shared Heap — Contains other types of memory allocation, such as shared memory and mapped memory for a process.
Heap memory is used by all the parts of the application whereas stack memory is used only by one thread of execution. Whenever an object is created, it's always stored in the Heap space and stack memory contains the reference to it.
Overview. Stack memory is the space allocated for a process where all the function calls, primitive data types (int, double, etc.) and local and reference variables of the functions are stored. On the other hand heap memory is used to store the objects that are created during the execution of a Java program.
The Java heap is the area of memory used to store objects instantiated by applications running on the JVM. When the JVM is started, heap memory is created and any objects in the heap can be shared between threads as long as the application is running.
Java memory (up to Java 8) consists of 3 parts:
Memory for all class instances is allocated from the heap. Non-heap memory is primarily used by ClassLoaders to store class-related data.
Some details about shared objects are here: what is shared objects file?.
196
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
