Re: [POC] Faster processing at Gather node

Alexander Kuzmenkov <a.kuzmenkov@postgrespro.ru>

From: Alexander Kuzmenkov <a.kuzmenkov@postgrespro.ru>
To: Rafia Sabih <rafia.sabih@enterprisedb.com>, Amit Kapila <amit.kapila16@gmail.com>
Cc: PostgreSQL Developers <pgsql-hackers@postgresql.org>
Date: 2017-09-11T10:59:42Z
Lists: pgsql-hackers
Thanks Rafia, Amit, now I understand the ideas behind the patch better. 
I'll see if I can look at the new one.

-- 

Alexander Kuzmenkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company



Commits

  1. C comment: fix wording about shared memory message queue

  2. shm_mq: Have the receiver set the sender's less frequently.

  3. shm_mq: Reduce spinlock usage.

  4. Remove use of byte-masking macros in record_image_cmp

  5. Remove memory leak protection from Gather and Gather Merge nodes.

  6. Avoid projecting tuples unnecessarily in Gather and Gather Merge.

  7. Tweak use of ExecContextForcesOids by Gather (Merge).

  8. Pass eflags down to parallel workers.

  9. Disable installcheck tests for test_session_hooks

  10. First-draft release notes for 10.1.

  11. Remove TupleDesc remapping logic from tqueue.c.

  12. Avoid memory leaks when a GatherMerge node is rescanned.

  13. Code review for nodeGatherMerge.c.

  14. Add a Gather Merge executor node.

  15. Push scan/join target list beneath Gather when possible.