| From: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Speedup of relation deletes during recovery |
| Date: | 2018-06-15 17:54:41 |
| Message-ID: | 74fae819-c790-3c6e-7964-12a8c5d82166@sigaev.ru |
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| Lists: | pgsql-hackers |
> We just had a customer hit this issue. I kind of wonder whether this
> shouldn't be backpatched: Currently the execution on the primary is
> O(NBuffers * log(ndrels)) whereas it's O(NBuffers * ndrels) on the
> standby - with a lot higher constants to boot. That means it's very
> easy to get into situations where the standy starts to lag behind very significantly.
+1, we faced with that too
--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/
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