Note on MySQL optimization mentality

In the original company, most of the requirements and designs wereProgramI am a "Obedient" person in charge of online research. The leaders let us do what we do. Now the company is quite good and has a dedicated planning team, all requirements are based on planning. In my mind, I plan everything. So when I optimize the database, my thinking is narrow. I only need to optimize SQL statements and create indexes, to optimize service parameters, we can see "MySQL high performance" mentioned that "Sometimes it is necessary to surpass the developer's identity and question the business needs at hand. Generally, people who write business requirements are not experts in database systems and do not understand the impact of these requirements on performance. If you tell them that a small feature doubles hardware requirements, they can understand that this feature is not necessary. "I am not questioning this attitude. I will pay attention to it later, we need to gradually train the overall view and questioning attitude.