Horton

Re: pgsql: Disk-based Hash Aggregation.

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Jeff Davis <jdavis@postgresql.org>
Cc: pgsql-hackers@lists.postgresql.org
Date: 2020-03-18T23:24:04Z
Lists: pgsql-hackers 
On 2020-Mar-18, Jeff Davis wrote:

> Disk-based Hash Aggregation.
> 
> While performing hash aggregation, track memory usage when adding new
> groups to a hash table. If the memory usage exceeds work_mem, enter
> "spill mode".

Kudos!!

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Reduce test time for disk-based Hash Aggregation.

  2. Disk-based Hash Aggregation.