From 7ee92dd84cf676f7a33c2ba5b0628f963a463f4d Mon Sep 17 00:00:00 2001
From: Dan Notestein <dan@syncad.com>
Date: Thu, 30 Jan 2025 22:16:20 +0000
Subject: [PATCH] autovacuum settings that can only be set in postgres.conf,
 reduce default work_mem to 64MB, plus small tweaks

---
 docker/postgresql.conf | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/docker/postgresql.conf b/docker/postgresql.conf
index ed08e002b..5047fb0ae 100644
--- a/docker/postgresql.conf
+++ b/docker/postgresql.conf
@@ -119,7 +119,6 @@ max_connections = 100			# (change requires restart)
 
 # - Memory -
 
-shared_buffers = 128MB			# min 128kB
 					# (change requires restart)
 #huge_pages = try			# on, off, or try
 					# (change requires restart)
@@ -222,8 +221,8 @@ dynamic_shared_memory_type = posix	# the default is the first option
 # - Checkpoints -
 
 #checkpoint_timeout = 5min		# range 30s-1d
-max_wal_size = 1GB
-min_wal_size = 80MB
+max_wal_size = 12GB
+min_wal_size = 1GB
 #checkpoint_completion_target = 0.5	# checkpoint target duration, 0.0 - 1.0
 #checkpoint_flush_after = 256kB		# measured in pages, 0 disables
 #checkpoint_warning = 30s		# 0 disables
@@ -788,11 +787,11 @@ external_pid_file = '/var/run/postgresql/17-main.pid'			# write an extra PID fil
 idle_in_transaction_session_timeout=60000 #ms
 
 shared_buffers = 16GB
-effective_cache_size = 8GB
+effective_cache_size = 16GB
 maintenance_work_mem = 4GB
-work_mem = 1024MB
+work_mem = 64MB
 
-checkpoint_completion_target = 0.8
+checkpoint_completion_target = 0.9
 checkpoint_timeout = 60min
 
 wal_buffers = 512MB
@@ -807,6 +806,10 @@ max_wal_senders = 0
 # Set to 4 to build indexes faster
 max_parallel_maintenance_workers = 4
 
+# these have to be set in postgresql.conf, cannot be set later
+autovacuum_max_workers = 5
+autovacuum_vacuum_cost_limit = 5000
+
 # Allows overriding above configuration settings
 
 # include files ending in '.conf' from
-- 
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