From f691f5b80a85c66d715b4340ffabb503eb19393e Mon Sep 17 00:00:00 2001 From: Thomas Munro Date: Tue, 5 Sep 2023 18:26:12 +1200 Subject: Remove the "snapshot too old" feature. Remove the old_snapshot_threshold setting and mechanism for producing the error "snapshot too old", originally added by commit 848ef42b. Unfortunately it had a number of known problems in terms of correctness and performance, mostly reported by Andres in the course of his work on snapshot scalability. We agreed to remove it, after a long period without an active plan to fix it. This is certainly a desirable feature, and someone might propose a new or improved implementation in the future. Reported-by: Andres Freund Discussion: https://postgr.es/m/CACG%3DezYV%2BEvO135fLRdVn-ZusfVsTY6cH1OZqWtezuEYH6ciQA%40mail.gmail.com Discussion: https://postgr.es/m/20200401064008.qob7bfnnbu4w5cw4%40alap3.anarazel.de Discussion: https://postgr.es/m/CA%2BTgmoY%3Daqf0zjTD%2B3dUWYkgMiNDegDLFjo%2B6ze%3DWtpik%2B3XqA%40mail.gmail.com --- src/backend/utils/misc/postgresql.conf.sample | 2 -- 1 file changed, 2 deletions(-) (limited to 'src/backend/utils/misc/postgresql.conf.sample') diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index c768af9a73b..6bb39d39bad 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -197,8 +197,6 @@ #max_parallel_workers = 8 # maximum number of max_worker_processes that # can be used in parallel operations #parallel_leader_participation = on -#old_snapshot_threshold = -1 # 1min-60d; -1 disables; 0 is immediate - # (change requires restart) #------------------------------------------------------------------------------ -- cgit v1.2.3