CustomWALResourceManagers

Custom WAL Resource Manager (rmgr)

Extensions can register their own custom WAL resource managers to support custom redo, physical replication, and logical replication/decoding.

Each resource manager needs to register using a unique ID (across all extensions) to prevent problems with crash recovery and replication. The IDs are limited, however, and only IDs between 128 and 255 (inclusive) are available for custom resource managers.

This page lists the current extensions that require a custom resource manager, and the IDs which are reserved for them. If your extension requires a new custom resource manager, start out by using RM_EXPERIMENTAL_ID (128). When the project is close to release or being used in production, choose an unused resource manager ID and add to this list to reserve it.

End-users must ensure that the extensions they deploy do not conflict, while it's not expected with open source extensions for which authors must take care of the current list, close source extensions could easily overlap.

List of Custom Rmgrs

RmgrId	Extension	Description	License
128	N/A	Used for extensions still in development	N/A
129	OrioleDB	OrioleDB – building a modern cloud-native storage engine (... and solving some PostgreSQL wicked problems) 🇺🇦	PostgreSQL License
130	EnterpriseDB	Bluefin – Compressed IoT storage	Proprietary
131	EnterpriseDB	Bluefin2 – Compressed IoT storage	Proprietary
132	EnterpriseDB	Marlin – High Update storage	Proprietary
133	EnterpriseDB	Marlin2 – High Update storage	Proprietary
134	Neon	Neon storage system	Apache 2
241	Columnar	Columnar compression extension	GNU AGPL3