I believe that many people are familiar with performance tuning, so why do we need performance tuning?
In order to obtain better system performance, keep the system running in good condition
Meet increasing business demands through performance tuning
Every company requires programmers to write code with good performance and strong maintainability. The job requirements of various high-end positions also require optimization as one of the mandatory requirements, so performance optimization appears frequently in interviews:
Interview questions:
The CPU, IO, and memory of the online system are suddenly full, and the interface response time is too long
The online system suddenly freezes and cannot be accessed, and frequently receives GC alarms
The online system suddenly overflows OOM memory, and the memory leak cannot be located
The online production environment does not know how to set various parameters of the JVM
The slow execution of SQL in the online system causes the system interface to time out
Deadlock caused by high concurrency of online database Mysql
The online database Mysql is inexplicably jittering and cannot be located
Despite the downturn this year, the demand for high-skilled talent is still there:
scroll up and down to see more
In terms of technology, such as: JVM, Mysql optimization, concurrency bottom-level related... These suggestions should be supplemented when you have time. Now recruiting resumes and interviews pay too much attention to these.
Whether it is from the perspective of recruitment and interview, or the perspective of work practice, performance optimization is a deep water area, and it is also a standard for measuring the ability of a programmer, and it also largely determines the upper limit of salary.
If you haven't mastered this set of mainstream technology, now you want to understand it in the shortest time. Here is just a course to recommend to everyone- "Double Eleven High Concurrent Power Generation Business System-Golden Nine Silver Ten Java Performance Tuning Interview Core Technical Points" , an advanced course specially created by my technical expert friend Zhuge from Turing Classroom.
In response to the popular needs of first-tier manufacturers, starting from the actual combat projects of 618 and double 1.1 billion traffic e-commerce systems , from the principle to actual combat, deeply analyze the Java performance tuning solution, consolidate your technology stack, and make performance tuning your resume bonus items.
From August 29th to September 1st , a four-day live course, the whole course is free , will give you an in-depth understanding of performance tuning.
you will reap
1. A deeper understanding of the underlying principles of the JVM, and a calm and unhurried response to interviews with major manufacturers
2. Enhance the ability to analyze, locate and solve JVM problems in large-scale system production environments
3. In-depth understanding of the underlying optimization principles of Mysql, and more confident in facing interview questions about Mysql optimization
4. The ability to analyze and optimize various performance problems of Mysql in the online environment of large-scale systems
5. The ability to build a large-scale distributed system with stable performance, high concurrency and high availability online environment
You can take a look at the curriculum arrangement of these four lessons first, a total of 39 technical points are explained. All kinds of high concurrency situations and performance tuning problems are solved in one go. The actual combat and projects are at the level of first-tier manufacturers. Mastering it is also a confidence for everyone to sprint to the big factories!
Course study materials:
scroll up and down to see more
Now scan the code to enter the course for free
Receive the latest version of interview materials in 2023
Interview information:
Baidu chapter, Didi chapter, Huawei chapter, JD chapter, Meituan chapter, Tencent chapter, Toutiao chapter, etc. Topical interview materials of first-line manufacturers and large Internet companies (with Alibaba Double Eleven popular technology and project analysis), as well as various Data collation of core technical points.
There are also knowledge points of core technologies such as Java, MyBatis, ZooKeeper, Dubbo, Elasticsearch, Memcached, Redis, MySQL, Spring, Spring Boot, Spring Cloud, RabbitMQ, Kafka, Linux, Dachang interview questions + detailed explanations.
1. JVM (2023)
(Including: JVM class loading mechanism, JVM memory model, garbage collection mechanism, class bytecode implementation mechanism, JVM tuning cases, GC log details, etc.)
Two, Java concurrent programming（2023）
(Including: java memory model, concurrent collection, thread pool, blocking queue, CAS and atomic operations, lock-free concurrent framework Disruptor, etc.)
3. Spring（2023）
(Including: spring IOC, spring AOP principle, spring 5, springMVC, transaction management, circular dependency, spring design pattern, etc.)
4. Mysql（2023）
(Including: SQL execution principle, index underlying mechanism, SQL execution plan analysis, Mysql lock mechanism, Mysql transaction isolation, SQL optimization practice, etc.)
Five, Spring Cloud articles（2023）
(Including: service discovery and registration Eureka and Nacos, service current limiting fuse downgrade Hystrix and Sentinel, distributed transaction Seata, gateway Gateway, etc.)
6. Dubbo articles（2023）
(Including: Dubbo foundation, architecture design, cluster, configuration, communication protocol, SPI, etc.)
7. Redis（2023）
(Including: Redis core data structure, Redis persistence mechanism and security mechanism, sentinel and cluster architecture, Redis cache penetration, cache invalidation, cache avalanche, Redis cache design and performance optimization, etc.)
8. Distributed articles（2023）
(Including: distributed architecture principles, cluster architecture principles, distributed locks, distributed transactions, distributed protocols, distributed configuration, massive data sub-database sub-table, distributed scheduling, etc.)
Now scan the code to enter the course for free
Receive the latest version of interview materials in 2023
9. Design Patterns（2023）
(Including: singleton pattern, factory pattern, abstract factory pattern, builder pattern, prototype pattern, adapter pattern, decorator pattern, proxy pattern, etc. 23 design patterns)
10. Data Structure and Algorithm（2023）
(Including: red-black tree, B+ tree, greedy algorithm, hash divide and conquer, seven search algorithms, dynamic programming, consensus algorithm, etc.)
Eleven, MQ articles（2023）
(Including: message loss, repeated message consumption, message disorder, message backlog, delay queue, message backtracking consumption, message flushing mechanism, MQ middleware cluster architecture principle, etc.)
Twelve, Netty articles（2023）
(Including: BIO, NIO and AIO threading models, Netty threading model, serialization protocol protobuf, sticky packet unpacking problem, Netty heartbeat mechanism, direct memory and Netty zero copy, WebSocket protocol, etc.)
Thirteen, Zookeeper articles（2023）
(Including: ZooKeeper election mechanism, ZooKeeper data model, ZooKeeper application scenarios, etc.)
14. ElasticSearch（2023）
(Including: ElasticSearch data model, ElasticSearch distributed architecture, ElasticSearch data reading and writing principles and segment merging, etc.)
15. Network and Operating System（2023）
(Including: network protocol, TCP/IP system structure, TCP/IP protocol family, common interview questions, etc.)
Now scan the code to enter the course for free
Receive the latest version of interview materials in 2023
