In-depth analysis and engineering practice of MySQL InnoDB MVCC mechanism
1. MVCC Architecture Design and Implementation Principles 1.1 Storage Engine Layer Architecture InnoDB uses a layered storage architecture to implement the MVCC mechanism: Memory structure: Buffer Pool: Data page cache pool (default 128MB) Undo Log Buffer: Transaction rollback log cache (default 16MB) Change Buffer: Non-unique index update buffer Disk structure: Clustered index B+ tree (primary key index) Secondary index B+ tree Undo...
SQL optimization: How to find problems in SQL and optimization ideas
In daily development, SQL performance issues often become one of the main reasons for system performance bottlenecks. Especially when the amount of data is growing rapidly, inefficient SQL queries may lead to increased database load, increased query latency, and even serious problems such as system unavailability. Therefore, it is particularly important for developers to master SQL optimization techniques. This article will systematically introduce how to discover SQL performance issues and efficient SQL optimization ideas to help developers improve database query performance. Contents S…