Use Solid Queue async mode for reduced memory

Author: ashwin47

Gemfile

@@ -15,7 +15,7 @@ gem "redis", "~> 5.4"
 gem "puma", "~> 6.6"
 
 # Jobs
-gem "solid_queue"
+gem "solid_queue", github: "joshleblanc/solid_queue", branch: "async-mode"
 
 # Assets
 gem "propshaft", github: "rails/propshaft"

Gemfile.lock

@@ -6,6 +6,19 @@ GIT
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)
 
+GIT
+  remote: https://github.com/joshleblanc/solid_queue.git
+  revision: d122b5eb5ce26ea1cf1f5741a2c40a88cc02822d
+  branch: async-mode
+  specs:
+    solid_queue (1.2.4)
+      activejob (>= 7.1)
+      activerecord (>= 7.1)
+      concurrent-ruby (>= 1.3.1)
+      fugit (~> 1.11)
+      railties (>= 7.1)
+      thor (>= 1.3.1)
+
 GIT
   remote: https://github.com/rails/importmap-rails.git
   revision: 51c1a531327fc04ed4552bb0fd523eb43561b817
@@ -345,13 +358,6 @@ GEM
     sentry-ruby (5.26.0)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
-    solid_queue (1.2.4)
-      activejob (>= 7.1)
-      activerecord (>= 7.1)
-      concurrent-ruby (>= 1.3.1)
-      fugit (~> 1.11)
-      railties (>= 7.1)
-      thor (>= 1.3.1)
     sqlite3 (2.7.3-aarch64-linux-gnu)
     sqlite3 (2.7.3-arm64-darwin)
     sqlite3 (2.7.3-x86_64-darwin)
@@ -421,7 +427,7 @@ DEPENDENCIES
   selenium-webdriver
   sentry-rails
   sentry-ruby
-  solid_queue
+  solid_queue!
   sqlite3
   stimulus-rails
   thruster

Procfile

@@ -1,3 +1,2 @@
-web: bundle exec thrust bin/start-app
+web: SOLID_QUEUE_IN_PUMA=true bundle exec thrust bin/start-app
 redis: redis-server config/redis.conf
-workers: bundle exec bin/jobs

config/puma.rb

@@ -47,8 +47,11 @@
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart
 
-# Run Solid Queue inside Puma in development (no separate bin/jobs process needed)
-plugin :solid_queue if Rails.env.development?
+# Run Solid Queue inside Puma (async mode = threads instead of forking processes)
+if ENV["SOLID_QUEUE_IN_PUMA"]
+  plugin :solid_queue
+  solid_queue_mode :async
+end
 
 # Reset all membership connections
 Membership.disconnect_all