Queries returning aggregate, summary, and computed data are frequently used in application development. Sometimes these queries are not fast enough. Caching query results using Memcached…
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Category: Postgres
Postgres
Understanding database Indexes in PostgreSQL
There are three types of developers: those who know that indexes speed up database queries, those who know that indexes speed up database queries and…
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Understanding Postgres GIN Indexes: The Good and the Bad
Adding, tuning and removing indexes is an essential part of maintaining an application that uses a database. Oftentimes, our applications rely on sophisticated database features…
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Performance Tuning Queries in PostgreSQL
Database performance tuning: developers usually either love it or loathe it. I happen to be one that enjoys it and want to share some of…
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Partitioning Large Tables
About Table Partitioning Partitioning does not change the physical distribution of table data across the segments. Table distribution is physical: Greenplum Database physically divides partitioned…
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PostgreSQL EXPLAIN Explained
When a SQL statement is sent to a PostgreSQL server for execution, Postgres will decipher various parts of the query and define an execution plan…
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TOAST compression and toast_tuple_target
What is the TOAST ? Have you ever wondered how Postgres stores rows that exceed the size of a block? As a reminder, the default…
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LZ4 TOAST compression in PostgreSQL 14
Background In PostgreSQL, a page is the basic unit to store data, and the size of each page is 8 kB by default. Basically, data in one…
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Postgres Locks
Table Locks If you ask me what a table lock three years ago I would say its a lock you obtain on a table so…
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How to measure performance of PostgreSQL Database Server(s)?
The benchmark test is designed to evaluate and compare the performance of different configurations, topologies, systems and components. For this purpose I will use the…
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