#Postgresql table size full

Subdirectory containing WAL (Write Ahead Log) files Subdirectory containing state files for prepared transactions Subdirectory containing symbolic links to tablespaces Subdirectory containing subtransaction status data Subdirectory containing temporary files for the statistics subsystem Subdirectory containing permanent files for the statistics subsystem Subdirectory containing exported snapshots Subdirectory containing information about committed serializable transactions Subdirectory containing replication slot data Subdirectory containing LISTEN/NOTIFY status data Subdirectory containing multitransaction status data (used for shared row locks) Subdirectory containing status data for logical decoding

Subdirectory containing files used by the dynamic shared memory subsystem Subdirectory containing transaction commit timestamp data Subdirectory containing cluster-wide tables, such as pg_database Subdirectory containing per-database subdirectoriesįile recording the log file(s) currently written to by the logging collector

0.A file containing the major version number of PostgreSQL.

2 Exabytes (2EB) in PostgreSQL 10 – 2048PB (Petabytes) or 2 million TB.

32 Terabytes (32TB) in PostgreSQL 9.6 or earlier.

So the maximum size of tables in PostgreSQL is

#Postgresql table size full

Fixed in PostgreSQL 11, so now we can go to the full 2^32 subtables, each of size 2^32 * 8192 bytes. My colleague David Rowley found a bug that has existed for >22 years in PostgreSQL that accidentally limited the number of subtables to a 16-bit value, limiting us in PostgreSQL 10 to only 65535 subtables, or 2048 Petabytes. We store that counter in a 32-bit field, so we ought to be able to store lots of data. Partitioning theoretically allows you to have one big table made up of many smaller tables. There is still work to be done and I’m pleased to say it looks like many of the issues will be solved in PostgreSQL 11, with much work contributed by a great many folk from the big names in PostgreSQL new feature development: 2ndQuadrant, EnterpriseDB, NTT Data (listed alphabetically). Luckily the next attempt was some years in the planning and started from a good design before it was written, leading to a successsful implementation of Declarative Partitioning in PostgreSQL 10. Major work came in the form of two failed attempts to add Partitioning, the first one using Rules and the second one using Triggers, neither of which was very practical. Various tweaks helped, but didn’t change the game significantly. PostgreSQL’s initial attempt at that was by myself in PostgreSQL 8.1 in 2005, where we introduced constraint_exclusion, though by my own admission that needed more major work. The big blocker there was that this wasn’t handled well in the Optimizer, so wasn’t easily usable. PostgreSQL has always supported Table Inheritance, which has been used in some cases to implement something similar to Table Partitioning in other databases. Only problem is that requires an unload/reload to change the block size, so the effective limit per table was 32TB as advertized. That was wrong in a two ways, because PostgreSQL has always had a configurable block size which allows up to 32768 bytes per block, which would give a maximum size of 128TB. The default block size is 8192 bytes, hence the default limit was 32TB as listed. The table size is limited by the maximum number of blocks in a table, which is 2^32 blocks. Only problem is that it has always been wrong, slightly.

One of those limits is the Maximum Table Size, listed as 32TB. Various limits on the PostgreSQL database are listed here: PostgreSQL 9 Cookbook – Chinese Edition.PostgreSQL Server Programming Cookbook – 2nd Edition.PostgreSQL 9 Administration Cookbook – 3rd Edition.PostgreSQL High Availability Cookbook – 2nd Edition.