sflow collector

It's been 2014 years now, but for most developers there are two things that are still a mystery--java garbage collection and the opposite sex (the yards were laughed at again). Since I don't know much about the latter, I think I'll try to talk about the former, especially with the advent of Java8, where there have been significant changes and improvements, the most important of which is the removal of persistent generations (PermGen) and some exciting new optimizations (which are mentioned later

History of the Java garbage collectorFirst stage, Serial (serial) collectorBefore jdk1.3.1, the Java virtual machine could only use the serial collector. The serial collector is a single-threaded collector, but its "single-threaded" meaning does not merely mean that it uses only one CPU or one collection thread to complete garbage collection, and more importantly

objects died, only a 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

The collector can easily invoke the stored procedure of the database, here is an example to see the specific program. Call a stored procedure with no return value using Oracle 's stored procedures as an example, the stored procedure has only one input parameter and no output parameters:Create Orreplace procedure Pro1(PID in VARCHAR)AsBeginINSERT into EMP values (PID, ' Mike ');Update emp set name= ' Rose ' where id=pid;CommitEndYou can u

collection (generational Collection) algorithm, which does not have any new ideas, but divides the memory into several blocks based on the different inventory cycles of the objects. In general, the Java heap is divided into the new generation and the old age, so that the characteristics of each era to adopt the most appropriate mobile phone algorithm. In the new generation, each garbage collection found that a large number of objects died, only a small number of survival, then the choice of rep

Memory Management in the Java hotspot™virtual machineConcurrent mark-sweep (CMS) CollectorFor many applications, end-to-end throughput are not as important as fast response time. Young generationCollections does not typically cause long pauses. However, old generation collections, though infrequent, canImpose long pauses, especially when large heaps is involved. To address this issue, the HotSpot JVM includes aCollector called the Concurrent Mark-sweep (CMS)

TITLE:JVM Study notes-garbage collectorDATE:2018/9/4 17:09:31Description: Recently started the study of the JVM, here to share their own learning process notes, hoping to help some small partners, but also a comb of their own learning.Garbage collector There is a lot of garbage collector content, but the algorithm principle is based on garbage collection algorithm, so here is only a brief introduction of th

JVM-Garbage Collector, jvm-garbage collection This article mainly introduces several JVM garbage collectors. As shown below, the three above are the new generation collectors, The following three are the collectors of the old generation. The G1 collector can be used for the collection of the new generation and the old generation. JVM Garbage Collector 1,Serial

Overview Program counters, local method stacks, virtual machine stacks are born with threads, and are extinguished with threads. Java heap and method area are different, this part of memory allocation and recycling are dynamic, the garbage collector is concerned about this part of memory. algorithm for determining whether an object is garbage The JVM does not use a reference-counting algorithm to manage memory, and the main thing is that reference co

What is a Java garbage collector? Java garbage collector is one of the three important modules of Java Virtual Machine (JVM) (the other two are interpreters and multithreading mechanisms), providing memory for ApplicationsMemory Allocation and Garbage Collect)Function, both operations occur on the Java stack (a memory segment is fast ). At a certain point in time, if more than one reference points to an obj

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

Introduction In the previous chapter we have explored the various algorithms of GC, so what is a garbage collector? In layman's terms, the algorithm is implemented using a programming language, and the resulting program is the garbage collector. Now that we've talked about the implementation of the programming language, it's time to discuss the garbage collector