PostgreSQL 15 introduced a new feature called “asynchronous commit”, which can help reduce replication lag by allowing multiple transactions to be committed concurrently. This feature works by allowing the server to continue processing new transactions […]
Thread contention in PostgreSQL occurs when multiple threads are competing for the same resources, such as CPU time, disk I/O, or database locks. This can lead to performance degradation, slower response times, and even database […]
In PostgreSQL, the catalog tables are system tables that store metadata information about the database objects such as tables, indexes, functions, and users. The catalog tables can be used to troubleshoot contention issues by providing […]
In PostgreSQL, shared buffers serve as the shared memory pool used to cache data pages in memory to improve read performance. Whenever a query needs to access data, it checks if the required pages are […]
In PostgreSQL, if explicit locking is not enforced, duplicate records can be inserted when multiple concurrent transactions try to insert the same record simultaneously. This can occur when two or more transactions are executed concurrently […]
In PostgreSQL, errors inside a transaction can also be handled using savepoints. A savepoint is a point within a transaction that can be rolled back, without rolling back the entire transaction. Here is an example […]
Using OR logic in outer joins can have a significant impact on PostgreSQL performance, especially when joining large tables. Here are a few factors to consider: To mitigate the impact of OR logic on PostgreSQL […]
When deleting records from a table that are referenced by other tables in PostgreSQL, there are several ways to ensure that the deletion is performed optimally and does not violate any foreign key constraints. Here […]
The I/O subsystem is a critical component of PostgreSQL, responsible for reading and writing data to and from disk. Here is an overview of the anatomy of PostgreSQL’s I/O subsystem: Monitoring the I/O subsystem is […]
Plan Cache Based Execution Statistics is a feature in PostgreSQL that collects and aggregates execution statistics for SQL statements that are stored in the plan cache. This allows users to monitor and analyze the performance […]
MySQL, InnoDB and Oracle are registered trademarks of Oracle Corp. MariaDB is a trademark of Monty Program AB. All other trademarks are property of their respective owners. Other product or company names mentioned may be trademarks or trade names of their respective owner. Copyrights © 2010-2024. All Rights Reserved by MinervaDB®.