From 350db87203268ba89213527eb24ec01afc098637 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Tue, 19 Jul 2016 18:41:30 -0400 Subject: [PATCH] Remove very-obsolete estimates of shmem usage from postgresql.conf.sample. runtime.sgml used to contain a table of estimated shared memory consumption rates for max_connections and some other GUCs. Commit 390bfc643 removed that on the well-founded grounds that (a) we weren't maintaining the entries well and (b) it no longer mattered so much once we got out from under SysV shmem limits. But it missed that there were even-more-obsolete versions of some of those numbers in comments in postgresql.conf.sample. Remove those too. Back-patch to 9.3 where the aforesaid commit went in. --- src/backend/utils/misc/postgresql.conf.sample | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index 18c433b919..7e622e37fd 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -62,8 +62,6 @@ # (change requires restart) #port = 5432 # (change requires restart) #max_connections = 100 # (change requires restart) -# Note: Increasing max_connections costs ~400 bytes of shared memory per -# connection slot, plus lock space (see max_locks_per_transaction). #superuser_reserved_connections = 3 # (change requires restart) #unix_socket_directories = '/tmp' # comma-separated list of directories # (change requires restart) @@ -119,10 +117,8 @@ #temp_buffers = 8MB # min 800kB #max_prepared_transactions = 0 # zero disables the feature # (change requires restart) -# Note: Increasing max_prepared_transactions costs ~600 bytes of shared memory -# per transaction slot, plus lock space (see max_locks_per_transaction). -# It is not advisable to set max_prepared_transactions nonzero unless you -# actively intend to use prepared transactions. +# Caution: it is not advisable to set max_prepared_transactions nonzero unless +# you actively intend to use prepared transactions. #work_mem = 4MB # min 64kB #maintenance_work_mem = 64MB # min 1MB #autovacuum_work_mem = -1 # min 1MB, or -1 to use maintenance_work_mem @@ -573,9 +569,6 @@ #deadlock_timeout = 1s #max_locks_per_transaction = 64 # min 10 # (change requires restart) -# Note: Each lock table slot uses ~270 bytes of shared memory, and there are -# max_locks_per_transaction * (max_connections + max_prepared_transactions) -# lock table slots. #max_pred_locks_per_transaction = 64 # min 10 # (change requires restart)