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How to find the disk size of a PostgreSQL?
I assume in Postgres there’s something I can use in the information_schema tables, but I’m not seeing where. Try the Database Object Size Functions. An example:
Why are PostgreSQL data files bigger than data?
If you add up your data and indexes, you get your DB size: 28GB + 42GB = 70GB. Having big indexes means there’s a lot of extra disk space used. Index data is also cached in memory, so having big indexes means you may have two copies of indexed data in RAM, which means there’s less RAM for caching data on disk and you get more cache misses.
How is the size of a table reported in PostgreSQL?
This will report size information for all tables, in both raw bytes and “pretty” form. Databases to which the user cannot connect are sorted as if they were infinite size. Relations are objects in the database such as tables and indexes, and this query shows the size of all the individual parts.
Why is my PostgreSQL database out of disk?
You usually will want to store data as long as possible, but this could be a problem if you don’t take the necessary actions to prevent a potential “out of disk space” issue. In this blog, we will see how we can detect this issue for PostgreSQL, prevent it, and if it is too late, some options that probably will help you to fix it.
When to use PG relation size in PostgreSQL?
Tables which have both regular and TOAST pieces will be broken out into separate components; an example showing how you might include those into the main total is available in the documentation, and as of PostgreSQL 9.0 it’s possible to include it automatically by using pg_table_size here instead of pg_relation_size:
When is a table worth vacuuming in PostgreSQL?
The autovacuum_vacuum_scale_factor command tells PostgreSQL that a table is worth vacuuming if 20% of data has been changed. The trouble is that if a table consists of one row, one change is already 100%. It makes absolutely no sense to fork a complete process to clean up just one row.
How to list all partitions in PostgreSQL 9.1?
I want to list all the partitions created by dynamic triggers in PostgreSQL 9.1. I was able to generate a count of partitions using this related answer by Frank Heikens. I have a table foo with an insert trigger that creates foo_1, foo_2 etc. dynamically.
How to list tables by their size in PostgreSQL?
Query below returns tables in a database with space they use ordered from the ones using most. Tables in pagila ordered from the ones using most space to least. There are no comments.
Is there way to get table size of partitioned table?
I know that Postgres is creating a table for each partition so I am getting entries for each partition separately, but is there a way to get one row per table, regardless of whether this table is partitioned or not? Going by instructions from @Laurenz Albe I created a query that satisfies my needs.