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Remove AtSubStart_Notify.

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Allocate notify-related state lazily instead. This makes trivial
subtransactions noticeably faster.

Patch by me, reviewed and tested by Dilip Kumar, Kyotaro Horiguchi,
and Jeevan Ladhe.

Discussion: https://postgr.es/m/CA+TgmobE1J22S1eC-6N-je9LgrcwZypkwp+zH6JXo9mc=4Nk3A@mail.gmail.com
This commit is contained in:
Robert Haas
2019-10-04 08:19:25 -04:00
parent 6837632b75
commit 967e276e9f
3 changed files with 168 additions and 139 deletions
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1
src/backend/access/transam/xact.c
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@@ -4743,7 +4743,6 @@ StartSubTransaction(void)
*/
AtSubStart_Memory();
AtSubStart_ResourceOwner();
AtSubStart_Notify();
AfterTriggerBeginSubXact();
s->state = TRANS_INPROGRESS;