Tuning InnoDB for Query Performance InnoDB Query Performance relies heavily on the query optimization system variables provided by InnoDB, the default storage engine in MySQL. These variables let you fine-tune and control how the query […]
InnoDB: Management of the Process Global Area (PGA) In InnoDB, the Process Global Area (PGA) manages per-connection memory and data structures for each client connection, including query execution buffers, sort buffers, and join buffers. […]
In MySQL, a cursor is a database object that allows you to retrieve and manipulate data row by row. It provides a mechanism for iterative processing of query results. Cursors are often used when you […]
InnoDB, the default storage engine in MySQL, uses a buffer pool to manage the reading and writing of data blocks. The buffer pool is a cache that holds frequently accessed data pages in memory, reducing […]
In MySQL, operators in a query execution plan can be classified as streaming or blocking based on how they process and propagate rows during query execution. Let’s explore the differences between streaming and blocking operators […]
Troubleshooting redo performance in InnoDB involves identifying and addressing potential bottlenecks or issues that affect the efficiency of redo log processing. The redo log plays a critical role in ensuring data durability and crash recovery […]
Scalar subquery unnesting is a transformation technique used by the MySQL optimizer to optimize queries that involve scalar subqueries. Scalar subqueries are subqueries that return a single value, typically used in expressions or as part […]
In MySQL, you can use query hints to provide suggestions or directives to the query optimizer about how to generate the execution plan for a specific query. Query hints allow you to have more control […]
Introduction The InnoDB history list length can grow significantly if there are long-running transactions that generate a lot of undo logs or if there are frequent transactions with large amounts of data being modified. This […]
In MySQL, undo operations are used to provide transactional consistency and to allow for rolling back changes made to the database during a transaction. Undo operations are implemented in the InnoDB storage engine, which is […]
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