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Cache classification: cache is divided into memory cache and JVM cache Memory cache, such as redis JVM cache is only used in java, and a single JVM is valid Cache usage scenarios Reduce database access pressure Create the springboot project < this article configures the JVM cache > Add cache dependency in pom.xml ...

background Demand:java technology stack, to access all the current projects to the log center, the requirements seem relatively simple But in the process of implementation, there are various problems, such as different departments, different development frameworks and different levels of personnel competence, Scheme selection: Each project ...

Or look at the blog on my CSDN:https://blog.csdn.net/u013332124/article/details/88367630 1. Introduction to JVMTI JVMTI (JVM Tool Interface) is a native programming interface provided by the Java virtual machine. It is an alternative version of JVMPI (Java Virtual Machine Profiler Interface) and JVMDI (Java Virtual Machine Debug Interface). ...

background The service process monitoring is generally handled by related components. In the early business, the DB resources used by specific services exceed the quota allocation, which leads to the failure of health detection. The services are successively offline from Eureka. When the service monitoring is not routed to a specific node, or r ...

Task 1: suppose the default length unit is meters, write a program to calculate the cost of coloring various shapes. Requirement: Write the BorderColorable interface, which requires: It has the method void paintBorder(), which needs to output "what shape's edge has been colored" in the impl ...

Original address: https://zhuanlan.zhihu.com/p/... I. overview 1. What is the singleton mode? Baidu Encyclopedia is defined as follows: single instance mode is a common software design mode. In its core structure, there is only one special class called singleton. Single instance mode can ensure that there is only one instance of a class in the ...

The life cycle of a class in a JVM includes seven stages: loading, preparing, validating, parsing, initializing, using, and unloading. Among them, preparation, verification and resolution are classified as connection stage. Load What the jvm does at this stage Get the binary byte stream of the class by the class name Convert the static s ...

We mentioned GC before, but when more and more objects are referenced in Java, there will be insufficient memory space, resulting in the error OutOfMemoryError and application termination. So why can't GC collect more objects at this time? This is related to the reference types mentioned today.<!-- more --> First of all, starting from JDK ...

I. overview 1.1 Thread and Process Differences Performance issues caused by 1.2 multithreading 2. Multithread Creation 2.1 First type - inheritance of Thread class 2.2 the second way to implement the Runnable interface 2.3 Third Kind - Implementing Callable Interface 2.4 Common Thread Constructors 2.5 Is it better to inherit ...

Threads and processes Process: Process is the basic unit of program operation and resource allocation. A program has at least one process. As shown in the following figure:   Threading: Thread is the basic unit of CPU scheduling and allocation. A process has at least one thread. Threads in the same process share process resources (red ...