Re: WIP: Avoid creation of the free space map for small tables

John Naylor <john.naylor@2ndquadrant.com>

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From: John Naylor <john.naylor@2ndquadrant.com>

To: Amit Kapila <amit.kapila16@gmail.com>

Cc: Mithun Cy <mithun.cy@enterprisedb.com>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2019-01-17T17:43:36Z

Lists: pgsql-hackers

Attachments

v14-0001-Avoid-creation-of-the-free-space-map-for-small-h.patch (text/x-patch) patch v14-0001
v14-0002-During-pg_upgrade-conditionally-skip-transfer-of.patch (text/x-patch) patch v14-0002

On Wed, Jan 16, 2019 at 10:35 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
> Yes, I think it would be good if you can explain the concept of
> local-map with the help of this example.

> Then let's not add a reference to the version number in this case.  I

Okay, done in v14. I kept your spelling of the new macro. One minor
detail added: use uint8 rather than char for the local map array. This
seems to be preferred, especially in this file.

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

Commits

Improve code comments in b0eaa4c51b.
- 06c8a5090ed9 12.0 landed
During pg_upgrade, conditionally skip transfer of FSMs.
- 13e8643bfc29 12.0 landed
Add more tests for FSM.
- 6f918159a97a 12.0 landed
Doc: Update the documentation for FSM behavior for small tables.
- 29d108cdecbe 12.0 landed
Make FSM test portable.
- 08ecdfe7e5e0 12.0 landed
Avoid creation of the free space map for small heap relations, take 2.
- b0eaa4c51bbf 12.0 landed
Move page initialization from RelationAddExtraBlocks() to use, take 2.
- 0d1fe9f74e36 12.0 cited
Avoid creation of the free space map for small heap relations.
- ac88d2962a96 12.0 landed
In bootstrap mode, don't allow the creation of files if they don't already
- d66e3664b8ba 12.0 landed