PostgreSQL DBA

Parallel Hash Joins in PostgreSQL are a type of join operation that can be executed in parallel, allowing for faster and more efficient execution of database queries. In a hash join, the database first builds […]

In PostgreSQL, Direct Path Read is implemented as an optimization technique for full table scans, which aims to bypass the buffer cache and read data directly from disk into the process memory, reducing the overhead […]

In PostgreSQL, buffer headers are data structures that represent a single page of data in the shared buffer cache. Each buffer header has information about the state of the page it represents, such as whether […]

In PostgreSQL, the lock behavior during an INSERT operation depends on the type of table that the operation is performed on. For a normal table, an INSERT lock is typically acquired on the table, which […]

PostgreSQL Vacuum Internals – What happens during PostgreSQL Vacuum Processing? During PostgreSQL vacuum processing, the database system scans through the table or index being vacuumed, removing any dead or outdated rows. This process is necessary […]

Cache trashing in PostgreSQL 15 occurs when there is high contention for the shared buffer cache. This can happen when there are many concurrent queries accessing the same data, or when there is a lack […]