From 4018babfab45567a0036d60136ce4d7874c496bd Mon Sep 17 00:00:00 2001
From: Paul Norman <penorman@mac.com>
Date: Mon, 11 Sep 2023 14:27:05 -0700
Subject: [PATCH] Set default effective_io_concurrency and random_page_cost to
 SSD values

Since all the drives with DBs on them are SSDs, set these GUCs to values
more appropriate to a generic SSD. NVMe drives could have even higher
concurrency, but this is a reasonable start.
---
 cookbooks/postgresql/attributes/default.rb | 4 ++--
 roles/eddie.rb                             | 4 +---
 roles/karm.rb                              | 5 ++---
 roles/prometheus.rb                        | 1 -
 roles/snap-01.rb                           | 4 +---
 roles/snap-02.rb                           | 4 +---
 roles/snap-03.rb                           | 4 +---
 roles/tile.rb                              | 1 -
 8 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/cookbooks/postgresql/attributes/default.rb b/cookbooks/postgresql/attributes/default.rb
index 878407aec..19d871ba1 100644
--- a/cookbooks/postgresql/attributes/default.rb
+++ b/cookbooks/postgresql/attributes/default.rb
@@ -9,7 +9,7 @@ default[:postgresql][:settings][:defaults][:temp_buffers] = "8MB"
 default[:postgresql][:settings][:defaults][:work_mem] = "4MB"
 default[:postgresql][:settings][:defaults][:maintenance_work_mem] = "64MB"
 default[:postgresql][:settings][:defaults][:max_stack_depth] = "2MB"
-default[:postgresql][:settings][:defaults][:effective_io_concurrency] = "1"
+default[:postgresql][:settings][:defaults][:effective_io_concurrency] = "256"
 default[:postgresql][:settings][:defaults][:max_worker_processes] = "8"
 default[:postgresql][:settings][:defaults][:max_parallel_workers_per_gather] = "2"
 default[:postgresql][:settings][:defaults][:max_parallel_workers] = "8"
@@ -30,7 +30,7 @@ default[:postgresql][:settings][:defaults][:wal_keep_size] = "0"
 default[:postgresql][:settings][:defaults][:hot_standby] = "on"
 default[:postgresql][:settings][:defaults][:hot_standby_feedback] = "off"
 default[:postgresql][:settings][:defaults][:seq_page_cost] = "1.0"
-default[:postgresql][:settings][:defaults][:random_page_cost] = "4.0"
+default[:postgresql][:settings][:defaults][:random_page_cost] = "1.1"
 default[:postgresql][:settings][:defaults][:cpu_tuple_cost] = "0.01"
 default[:postgresql][:settings][:defaults][:effective_cache_size] = "4GB"
 default[:postgresql][:settings][:defaults][:default_statistics_target] = "100"
diff --git a/roles/eddie.rb b/roles/eddie.rb
index 319be0b9d..61e452455 100644
--- a/roles/eddie.rb
+++ b/roles/eddie.rb
@@ -19,9 +19,7 @@ default_attributes(
         :shared_buffers => "64GB",
         :work_mem => "64MB",
         :maintenance_work_mem => "1GB",
-        :effective_cache_size => "180GB",
-        :effective_io_concurrency => "256",
-        :random_page_cost => "1.1"
+        :effective_cache_size => "180GB"
       }
     }
   },
diff --git a/roles/karm.rb b/roles/karm.rb
index cc3a425b9..ac28c48d4 100644
--- a/roles/karm.rb
+++ b/roles/karm.rb
@@ -25,9 +25,8 @@ default_attributes(
         :shared_buffers => "64GB",
         :work_mem => "64MB",
         :maintenance_work_mem => "1GB",
-        :effective_cache_size => "180GB",
-        :effective_io_concurrency => "256",
-        :random_page_cost => "1.1"
+        :effective_cache_size => "180GB"
+
       }
     }
   },
diff --git a/roles/prometheus.rb b/roles/prometheus.rb
index 85a1f1829..8dfe36a87 100644
--- a/roles/prometheus.rb
+++ b/roles/prometheus.rb
@@ -9,7 +9,6 @@ default_attributes(
         :shared_buffers => "48GB",
         :work_mem => "8MB",
         :maintenance_work_mem => "2GB",
-        :effective_io_concurrency => "200",
         :max_worker_processes => "67",
         :max_parallel_workers_per_gather => "28",
         :max_parallel_workers => "56",
diff --git a/roles/snap-01.rb b/roles/snap-01.rb
index 15db38629..d7fb452a5 100644
--- a/roles/snap-01.rb
+++ b/roles/snap-01.rb
@@ -25,9 +25,7 @@ default_attributes(
         :shared_buffers => "128GB",
         :work_mem => "128MB",
         :maintenance_work_mem => "2GB",
-        :effective_cache_size => "360GB",
-        :effective_io_concurrency => "256",
-        :random_page_cost => "1.1"
+        :effective_cache_size => "360GB"
       }
     }
   },
diff --git a/roles/snap-02.rb b/roles/snap-02.rb
index 8dc70a658..80a2b3598 100644
--- a/roles/snap-02.rb
+++ b/roles/snap-02.rb
@@ -19,9 +19,7 @@ default_attributes(
         :shared_buffers => "128GB",
         :work_mem => "128MB",
         :maintenance_work_mem => "2GB",
-        :effective_cache_size => "360GB",
-        :effective_io_concurrency => "256",
-        :random_page_cost => "1.1"
+        :effective_cache_size => "360GB"
       }
     }
   },
diff --git a/roles/snap-03.rb b/roles/snap-03.rb
index 3bae5690c..749859eb1 100644
--- a/roles/snap-03.rb
+++ b/roles/snap-03.rb
@@ -25,9 +25,7 @@ default_attributes(
         :shared_buffers => "128GB",
         :work_mem => "128MB",
         :maintenance_work_mem => "2GB",
-        :effective_cache_size => "360GB",
-        :effective_io_concurrency => "256",
-        :random_page_cost => "1.1"
+        :effective_cache_size => "360GB"
       }
     }
   },
diff --git a/roles/tile.rb b/roles/tile.rb
index 65c0a577c..6b159b568 100644
--- a/roles/tile.rb
+++ b/roles/tile.rb
@@ -46,7 +46,6 @@ default_attributes(
         :commit_delay => "10000",
         :max_wal_size => "2880MB",
         :max_wal_senders => "0",
-        :random_page_cost => "1.1",
         :jit => "off",
         :track_activity_query_size => "16384",
         :autovacuum_vacuum_scale_factor => "0.05",
-- 
2.39.5