Programmer Think

Story backgroundWith the decline of hardware price, people rely more and more on hardware. I even heard that the code is not important. If not, add machines. For example, the use of cache is usually based on virtual machine memory, disk storage and Middleware (Redis memory). We all know that the most suitable is the best, but in practice, it is ...

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 ...

Article directory What is caching? What is the cache in Mybatis? 1. Brief introduction of caching mechanism 2. Level 1 Cache 2.1. Use of Level 1 Cache 2.2. Several Cases of First-level Cache Failure (1) Different SqlSession s correspond to diffe ...

Links to the original text: https://my.oschina.net/mohaiyong/blog/221286 Cache code has been written a lot before, but has not been sorted out, always lazy! In this case, we need to d ...

Why do you need caching Stretch program performance Relational databases: databases with relationships between data and data mysql/Oracle, sqlserver Non-relational databases: There is no relationship between data and data, key-value 1. File-based database: ehcache 2. Memory-based databas ...

The previous article described the problem of release s without definite version numbers. Describe recent problems in the system. One day this email suddenly appeared in the development environment. Normal as follows It's particularly strange why the theme has disappeared and the content seems to be scrambled. With shallow mail knowled ...

Popularization of secondary caching for small group partners Description of two-level caching Afterwards, the small partners in the group developed the announcement function by using the secondary cache. The functions are as follows: <cache name="notice" maxElementsInMemory="100000" eternal="false" overflowToDisk="fals ...

Hibernate's cache management: Cache is a cache, and it is often the most important means of improving system performance, acting as a reservoir and buffer for data.Cache is particularly important for systems that rely heavily on data read operations.In the case of large concurrency, if each program needs to query the database directly, the perf ...

All along, we put data dictionary and other information in Redis cache, avoid using it, penetrate the database level, while improving performance. Recently, it was discovered that there were frequent Redis connection timeouts and other anomalies on the line. After tracking, it was found that a new dictionary table with more than 30,000 rows of ...

Ehcache is configured in Spring, created by EhCache Manager FactoryBean and enabled a Cache Manager instance to manage Cache. How does Cache Manager manage Cache? Who created Cache? Org. spring framework. cache. CacheManager: source code public interface CacheManager { @Nullable Cache getCache(String var1); Colle ...