Table of Contents
Is it bad to have a large table in Postgres?
Typically, the data in this table tracks events in an application or is analogous to an application log. Having a table of this size isn’t a problem in and of itself, but can lead to other issues; query performance can start to degrade and indexes can take much longer to update.
How big is the Postgres database in GB?
The amount of time invested will pay off a hundred times over. The Postgres community is your second best friend. Earlier this week the performance of one of our (many) databases was plagued by a few pathologically large, primary-key queries in a smallish table (10 GB, 15 million rows) used to feed our graph editor.
Is there support for partitioning in PostgreSQL?
Postgres has basic support for table partitioning via table inheritance. Inheritance for tables in Postgres is much like inheritance in object-oriented programming. A table is said to inherit from another one when it maintains the same data definition and interface.
Which is the second best friend of Postgres?
The Postgres community is your second best friend. Earlier this week the performance of one of our (many) databases was plagued by a few pathologically large, primary-key queries in a smallish table (10 GB, 15 million rows) used to feed our graph editor. In 99.9% of accounts these queries would be zippy.
Typically, the data in this table tracks events in an application or is analogous to an application log. Having a table of this size isn’t a problem in and of itself, but can lead to other issues; query performance can start to degrade and indexes can take much longer to update.
The amount of time invested will pay off a hundred times over. The Postgres community is your second best friend. Earlier this week the performance of one of our (many) databases was plagued by a few pathologically large, primary-key queries in a smallish table (10 GB, 15 million rows) used to feed our graph editor.
How is table partitioning used in PostgreSQL?
Table partitioning allows you to break out one very large table into many smaller tables dramatically increasing performance. As pointed out in the ‘Setting up Partitioning Manually’ section, many challenges exist when trying to create and use table partitioning on your own but pg_partman can ease that operational burden.
How to update large tables in PostgreSQL 9.2?
If possible, you should drop all the indexes, triggers and foreign keys while the update runs and recreate them at the end. Adding a nullable column without a default value is a cheap operation. Writing the actual data of the column is the expensive part. Converting between some data types does not require a full table rewrite since Postgres 9.2.