10.1: hash index size exploding on vacuum full analyze

From: AP <pgsql(at)inml(dot)weebeastie(dot)net>
To: pgsql-bugs(at)postgresql(dot)org
Subject: 10.1: hash index size exploding on vacuum full analyze
Date: 2017-11-15 23:29:22
Message-ID: 20171115232922.5tomkxnw3iq6jsg7@inml.weebeastie.net
Views: Raw Message | Whole Thread | Download mbox
Thread:
Lists: pgsql-bugs

I've some tables that'll never grow so I decided to replace a big index
with one with a fillfactor of 100. That went well. The index shrunk to
280GB. I then did a vacuum full analyze on the table to get rid of any
cruft (as the table will be static for a long time and then only deletes
will happen) and the index exploded to 701GB. When it was created with
fillfactor 90 (organically by filling the table) the index was 309GB.

I would've expected the index size to, at worst, remain constant rather
than explode. Am I wrong or is this a bug?

PostgreSQL is v10.1. Original index created on v10.0.

Responses

Browse pgsql-bugs by date

  From Date Subject
Next Message Amit Kapila 2017-11-16 04:18:13 Re: 10.1: hash index size exploding on vacuum full analyze
Previous Message kevinsantiago-19 2017-11-15 23:08:39 BUG #14910: Imposible instalar postgres