garbage collector run

part of the memory allocation and recycling is dynamic, The garbage collector is concerned with this part of memory, and the "Memory" allocation and recycling in the subsequent discussion of this book refer only to this part of memory.Object is dead?The heap contains almost all of the object instances in the Java world, and the first thing the garbage

unchanged, if the pause time is reduced, the frequency will increase; Since the frequency increases, the description will be frequent GC, the throughput will be reduced, performance will be reduced.Throughput: The ratio of time/cpu total elapsed time for the CPU to user code, that is, when the user code is run/(run user code time + garbage collection time). For

machines in client mode, and recovering from the new generation of one hundred or two hundred trillion is basically within 100 milliseconds, and these pauses are perfectly acceptable. Parnew is a multithreaded version of serial, which is the preferred collector for virtual machines in service mode, mainly because it can be used in conjunction with the mainstream old age collector cms. The number of th

garbage, the area is immediately recycled (x in the figure). At the same time, the object activity of each region (the proportion of the surviving objects in the region) is calculated during the concurrent tagging process.4, Remark, re-mark, there will be a short pause (STW). The re-tagging phase is used to collect the concurrency tag phase to generate new garbage (concurrent phases and applications

In-depth understanding of Java Virtual Machine (2) ------ Garbage Collector and memory allocation policy, ------ garbage collection GC is one of the biggest differences between java and C ++. 1. What does GC collect? In the previous article, we talked about the memory distribution. The program counter stack, virtual machine stack, and local method Stack are gener

concurrency tagging phase, if all objects in a zone object are found to be garbage, the area is immediately recycled (x in the figure). At the same time, the object activity of each region (the proportion of the surviving objects in the region) is calculated during the concurrent tagging process.4,Remark, re-mark, there will be a short pause (STW). The re-tagging phase is used to collect the concurrency tag phase to generate new

may require different memory, we can only know when the program is running, which objects will be created, this part of the memory allocation and recycling is dynamic, The garbage collector is concerned with this part of memory, and the "Memory" allocation and recycling in the subsequent discussion of this book refer only to this part of memory. Object is dead? The heap contains almost all of the obj

Introduction In the previous chapter we have discussed the implementation of hotspot garbage collector, a total of six implementations of six combinations. This LZ together with you to discuss the six kinds of collectors of their respective power and the power of the combination. In order to facilitate you to watch and contrast, LZ decided to use the original design pattern used in the way, for some colle

part of the memory allocation and recycling is dynamic, The garbage collector is concerned with this part of memory, and the "Memory" allocation and recycling in the subsequent discussion of this book refer only to this part of memory.Object is dead?The heap contains almost all of the object instances in the Java world, and the first thing the garbage

collector is actually the programming language implementation of the algorithm. Since it involves the programming language, it must be thread-bound, and we've always assumed that a GC thread is doing the GC thing before we explain the algorithm. Therefore, the garbage collector is broadly divided into the following three categories. Serial

collection period is a good choice for running virtual machines in client mode. parnew Collector The Parnew collector is actually a multi-threaded version of the serial collector, which includes all the control parameters available to the serial collector, the collection algorithm, the Stop the world, the object alloc

you determine which objects are "available" and which objects are "unavailable." When the garbage collector determines that some objects are "not available," The garbage collector reclaims the memory space. However, the garbage collecto