jvm memory management

This LZ and you share the last two algorithms of GC, the replication algorithm and the tagging/finishing algorithm. As mentioned in the previous chapter on the marking/elimination algorithm, both of these algorithms evolve on this basis, and what are the two algorithms that optimize the previous tagging/removal algorithms? Replication algorithm Let's first take a look at the replication algorithm, the replication algorithm divides memory into two in

JVM Memory Composition Structure The JVM stack consists of heaps, stacks, local method stacks, method areas, and so on, as shown in the following chart: 1) Heap All the memory of objects created by new is allocated in the heap, and its size can be controlled by-XMX and-XMS. The heap is divided into the Cenozoic and th

First, we recall the root search algorithm mentioned in the previous chapter, which solves the problem of which objects we should recycle, but it obviously does not have the burden of garbage collection, because we want to do garbage collection while the program is running (the Java program that we run on the JVM). You must let the GC thread and the thread in the program to cooperate with each other in order to not affect the operation of the program

The Java Virtual machine memory management diagram looks like this:1. Thread sharing area, which is shared by all threads, has several components in the thread sharing area:1. Method area: Run the constant-time pool, the class information that has been loaded by the virtual machine, constants, static variables, the instant compiler compiled code and other data2.java Heap: Storage Object instance　　2. Thread

3. For JVM memory configuration parameters:-xmx10240m-xms10240m-xmn5120m-xxsurvivorratio=3, its minimum memory value and survivor area total size are () 5120m,1024m 5120m,2048m 10 240m,1024m 10240m,2048m Answer: D-XMX: Max Heap size-xms: Initial heap size-xmn: Young generation size-xxsurvivorratio: The ratio of the young to the survivor area in the middle of the

addresses of all surviving objects. In terms of efficiency, the tag/sorting algorithm is lower than the copy algorithm. Algorithm Summary 1. All three algorithms are based on the root search algorithm to determine whether an object should be recycled. The theoretical basis for supporting root search algorithms to work normally is the scope of variables in the syntax. Therefore, the most fundamental way to prevent memory leakage is to master the v

This is the last GC-related article, the LZ is just a list of key parameters related to the garbage collector in the Hotspot JVM, as well as explanations of each parameter. Don't say much nonsense, this begins. Garbage collector selection Parameters USESERIALGC: Open this parameter using the serial serial old collector (client mode defaults). USEPARNEWGC: Open this parameter using the Parnew serial old collector (not recommended). USECONCMARKSWE

Why do we need to understand GC policies and principles? The reason in the previous chapter has actually touched, is because in peacetime work and research, inevitably will encounter the memory overflow and the memory leaks the question. If you are not aware of the GC strategy and principles of the problem encountered before, many times it will be overwhelmed. When we understand the relevant knowledge, al

JVM interpretation (III): JVM memory region, interpretation of jvm memory region The full name of JVM is java Virtual Machine (java Virtual Machine). JVM shields software and hardware

Difference between heap memory and stack memory in JVM, and between jvm heap memory Java divides memory into two types: stack memory and stack memo