Horton

Re: WAL logging problem in 9.4.3?

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Heikki Linnakangas <hlinnaka@iki.fi>
Cc: Simon Riggs <simon@2ndQuadrant.com>, Tom Lane <tgl@sss.pgh.pa.us>, Andres Freund <andres@anarazel.de>, Fujii Masao <masao.fujii@gmail.com>, Martijn van Oosterhout <kleptog@svana.org>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2015-10-21T14:53:44Z
Lists: pgsql-hackers 
Heikki Linnakangas wrote:

> Thanks. For comparison, I wrote a patch to implement what I had in mind.
> 
> When a WAL-skipping COPY begins, we add an entry for that relation in a
> "pending-fsyncs" hash table. Whenever we perform any action on a heap that
> would normally be WAL-logged, we check if the relation is in the hash table,
> and skip WAL-logging if so.

I think this wasn't applied, was it?

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

Commits

  1. Add perl2host call missing from a new test file.

  2. Skip WAL for new relfilenodes, under wal_level=minimal.

  3. Revert "Skip WAL for new relfilenodes, under wal_level=minimal."

  4. Back-patch log_newpage_range().

  5. During heap rebuild, lock any TOAST index until end of transaction.

  6. In log_newpage_range(), heed forkNum and page_std arguments.

  7. Back-patch src/test/recovery and PostgresNode from 9.6 to 9.5.

  8. Reduce pg_ctl's reaction time when waiting for postmaster start/stop.

  9. Accelerate end-of-transaction dropping of relations

  10. Redesign the planner's handling of index-descent cost estimation.

  11. Make TRUNCATE do truncate-in-place when processing a relation that was created