InnoDB early lock release is a feature in MySQL 8 and higher that allows the database to release locks earlier in the transaction processing process. This helps to reduce lock contention and improve overall performance. […]
Page compression is implemented in InnoDB using the “Compressed InnoDB Tables” feature. This feature compresses the data stored in individual pages of the InnoDB tables, reducing their size and thus reducing the amount of disk […]
In MySQL 8, partition pruning has been improved to make it more efficient and flexible. Partition pruning is a performance optimization technique that helps to minimize the amount of data that needs to be scanned […]
How to control automatic database maintenance operations in PostgreSQL 15? In PostgreSQL 15, automatic database maintenance is controlled by several configuration parameters. Here are a few examples: maintenance_work_mem – this parameter controls the amount of […]
How is the transaction model implemented in PostgreSQL? In PostgreSQL, transactions are implemented using the Multi-Version Concurrency Control (MVCC) model. This means that each transaction is given a snapshot of the database at the start […]
How to check which queries are active or blocked in PostgreSQL? You can use the pg_stat_activity view in PostgreSQL to check which queries are currently active or blocked. This view provides information about each running […]
How PostgreSQL Locking works with FOR UPDATE MODE queries? In PostgreSQL, when a query is executed with the FOR UPDATE mode, it places a lock on the selected rows. This lock prevents any other queries […]
How to handle NULL values in PostgreSQL IS NULL: This operator is used to check if a column or expression is NULL. Example: SELECT * FROM table WHERE column_name IS NULL; IS NOT NULL: This […]
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