graylog collector

ObjectiveThe garbage collection algorithm has been described in more detail here, we will introduce the specific garbage collector in the JVM, in the virtual machine specification is not how to implement the garbage collector, so each manufacturer's garbage collector may be completely different, However, we are introducing the JDK1.7-based hotspot virtual machine

Serial CollectorSerial is a new generation collector; single-threaded garbage collector with a copy algorithm-xx:+useserialgc Parnew CollectorParnew is a new generation collector; The Parnew collector is actually a multithreaded version of the serial collector, and the rem

This article consists ofimportnew - nice translator from Javapapers. Directory Introduction to Garbage collection How does garbage collection work? Categories of garbage collection Garbage collection Monitoring and analysis In this tutorial we will learn several existing garbage collector. In Java, garbage collection is an automated process that can replace programmers in allocating and reclaiming memory for these complex tas

In this section, let's summarize what the JVM garbage collector does. Garbage collectorDetermine if an object reference is invalidObject Survival Judgment algorithmReference judgment ProcessIntroduction to garbage collection algorithmsGarbage collectorNew Generation garbage collectorOld age garbage collectorNew generation and old age garbage collector garbage collectors determine whether object reference is

1. Serial Collector The serial collector is a single thread collector, but its "single-threaded" meaning does not simply mean that it uses only one CPU or a collection thread to do the garbage collection, and more importantly, when it does garbage collection, all the other worker threads must be paused until the collection is complete. Serial

What is the Java garbage collector The Java garbage collector is one of the three key modules of the Java Virtual Machine (JVM) (the other two are interpreters and multithreading mechanisms), providing automatic memory allocation (Memory allocation), automatic recycle (garbage Collect) capabilities for Applications, Both of these actions occur on the Java heap (a section of memory is fast). At one point, a

up directly. Generational collection algorithm (generational Collection): According to the different life cycle of the object divides the memory into several blocks, generally divides the Java heap into the Cenozoic and the old age, then uses the most appropriate collection algorithm according to the characteristic of each age. garbage collectorThe garbage collector is a specific implementation of memory reclamation. A hotspot vir

machines. The idea of active interruption is that when the interruption occurs, the virtual machine sets a flag on all threads, the thread checks the flag on its own, and then enters the "security point ". The inspection mark is located at the same place as the security point.3. Security zoneThe problem not solved above is that when a thread is in sleep or no CPU clock is allocated, such as sleep or blocked status, it cannot go to the security point to suspend itself. In this case, we

Java Virtual machine garbage collector and memory allocation policy overview Those memory needs to be recycled, when to recycle, and how to recycle is the 3 things a GC needs to accomplish. program counters, the virtual machine stack and the local method stack are all three areas of thread-private, memory allocation and recycling are deterministic, and memory is recycled as the method ends or the thread ends. The Java heap and

Label:Recently checked the relevant configuration of the Ihyerdb-modbus collector, because there is no relevant modbus equipment, so this morning according to the online clues to download the Modbus Slave (modbus slave simulator). The laptop does not have a serial port, so it downloads virtual Serial Port Driver 7.2 Virtual serial port. Everything is ready to start the simulation experiment. 1. Download Modbus Slave:http://down1.cr173.com/soft1/modbus

I. Introduction to Java garbage collection(1) The various parts of the Java memory runtime area, where the program counter, virtual machine stack, local method stack three regions are born with threads, and the stack frames in the stack execute the stack and stack operations in a methodical manner as the method enters and exits.(2) How much memory is allocated per stack frame is basically known when the class structure is determined (although some optimizations are made by the JIT compiler at ru

small number of survival, then choose the replication algorithm, only need to pay a small number of surviving objects of the replication cost can be completed collection. In the old age, because of the high survival rate of the object and the lack of additional space to guarantee it, it must be recycled using the "mark-clean" or "mark-sweep" algorithm.Garbage collectorIf the collection algorithm is the method of memory recycling, the garbage collector