Informix Introduction

Informix is a relational Database management system (RDBMS), originally created by Roger Sippl in 1980. It was originally developed on the research project of Michael Stonebraker, and later released by Informix Software in 1985. Informix databases are suitable for enterprises and applications of all sizes. It is widely used in industries such as finance, telecommunications, retail, and manufacturing. Informix has high availability and reliability, and can handle a large number of transactions, supporting large-scale data storage and processing. The advantages of Informix include: 1. Excellent performance: Informix has excellent performance in processing large-scale data, including fast read and write operations and high concurrency performance. 2. Scalability: Informix supports horizontal and vertical scaling, and can adapt to the constantly growing data volume and user needs. 3. High availability: Informix provides features such as data replication, failover, and automatic fault recovery to ensure data persistence and availability. 4. Multiple functions: Informix supports multiple data types, complex queries, stored procedures, and transaction control functions to meet various complex needs. However, Informix also has some drawbacks: 1. Relatively unpopular: Compared to some more popular database systems such as Oracle and MySQL, Informix has a relatively small user base, and related resources and community support may be slightly insufficient. 2. The Learning curve is steep: For developers who have not used Informix, learning and mastering its technology may require some time and effort. Informix's technical principle is a storage engine based on Multiversion concurrency control (MVCC) and B+tree index. It uses row level locking and multi version Snapshot isolation to ensure concurrent access and consistency control of data. In addition, it also adopts various optimization techniques, such as query optimizers and transaction logs, to improve system performance and reliability. To analyze the performance of Informix, various performance monitoring tools and commands can be used, such as Informix Server Administrator (ISA), sysmaster database, dbaccess command, etc. These tools and commands can provide various indicators and monitoring data about the database, thereby helping to analyze and tune system performance. The official website of Informix is: https://www.ibm.com/analytics/informix To sum up, Informix is a powerful and high-performance relational Database management system, which is suitable for enterprises of all sizes and application scenarios. It has high availability, scalability and multiple functions, but is relatively unpopular and has a steep Learning curve. Its technical principles are based on MVCC and B+tree indexing, and various optimization techniques are adopted to improve performance and reliability. By using performance monitoring tools and commands, Informix's performance can be analyzed and tuned.