Puma config hotfixes

config/puma.rb

@@ -6,7 +6,7 @@
 # the maximum value specified for Puma. Default is set to 3 threads for minimum
 # and maximum; this matches the default thread size of Rails 7.1.
 #
-max_threads_count = ENV.fetch("RAILS_MAX_THREADS", 3)
+max_threads_count = ENV.fetch("RAILS_MAX_THREADS", 1) # FIXME: GB This is a hotfix for yet-unexplained performance issues
 min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
 threads min_threads_count, max_threads_count
 
@@ -35,26 +35,14 @@
 # Specifies that the worker count should equal the number of processors in production.
 if ENV["RAILS_ENV"] == "production"
   require "concurrent-ruby"
-  worker_count = Integer(ENV.fetch("WEB_CONCURRENCY") { Concurrent.physical_processor_count })
+  worker_count = Integer(ENV.fetch("WEB_CONCURRENCY") { Concurrent.available_processor_count })
   workers worker_count if worker_count > 1
 
   # Use the `preload_app!` method when specifying a `workers` number.
   # This directive tells Puma to first boot the application and load code
   # before forking the application. This takes advantage of Copy On Write
   # process behavior so workers use less memory.
   preload_app!
-
-  before_fork do
-    if defined?(ActiveRecord::Base)
-      ActiveRecord::Base.connection.disconnect!
-    end
-  end
-
-  on_worker_boot do
-    if defined?(ActiveRecord::Base)
-      ActiveRecord::Base.establish_connection
-    end
-  end
 end
 
 # Allow puma to be restarted by `rails restart` command.