RUM and WAL-generation - Mailing list pgsql-general

From Andreas Joseph Krogh
Subject RUM and WAL-generation
Date
Msg-id VisenaEmail.3c.31ebd9cf1d8c010d.1754a2b310a@tc7-visena
Whole thread Raw
List pgsql-general
Hi all.
 
The RUM-index is very nice, but indexes get very large and produce insane amounts of WAL.
Due to the way PG works (IIUC), updating an int-column in a row produces lots of WAL because the whole row is duplicated, and if that row holds RUM-indexed columns it gets really bad...
We hav actually run out of WAL-space in production because of this.
 
I see this TODO-entry in RUM:
 
  • Improve GENERIC WAL to support shift (PostgreSQL core changes).
What is the status on this?
 
--
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
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