MySQL 8 introduced several improvements to reduce contention for metadata locks, which are locks that are used to manage access to database objects such as tables and indexes. Here are a few ways in which […]
In MySQL 8, invisible indexes are a feature that allows you to create an index without it being used by the optimizer. This can be useful in situations where you want to test the impact […]
In MySQL, if the server crashes after an update and the transaction was not committed, the changes made by the transaction will be rolled back during the crash recovery process. This is because MySQL uses […]
The impact of ordered versus random index insertion in InnoDB depends on several factors, including the size and complexity of the table, the frequency of inserts, and the workload of the database. Ordered index insertion […]
InnoDB Mutexes are synchronization objects used by the InnoDB storage engine to ensure that different threads can access shared resources safely. Mutex waits can be a bottleneck for performance in MySQL 8, as they can […]
Comprehensive Guide to Optimizing MySQL 8 Performance with Group Commit: Understanding, Fine-Tuning System Variables, and Monitoring Techniques for Enhanced Throughput and Reduced Disk I/O Overhead Group commit in MySQL 8 is a critical feature that […]
MySQL can ignore histograms in the query optimizer when it determines that using the histograms would not provide any benefit to the query execution plan. This can occur in several cases, including: Why MySQL ignores […]
Mutex contention occurs in MySQL when multiple threads attempt to access a shared resource, such as a data structure or a system resource, simultaneously. Because only one thread can access the resource at a time, […]
Multiversion Concurrency Control (MVCC) is a mechanism that is used by InnoDB, the default storage engine in MySQL, to provide transactional consistency and support for concurrent access to the same data. In InnoDB, MVCC is […]
A biased join in MySQL 8 can have a significant impact on query performance. A biased join occurs when the query optimizer makes a decision to use a particular index or join type based on […]
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