[ruby/rack] Use autotune for database connections

TechEmpower · Nov 10, 2023 · 32a3914 · 32a3914
1 parent 7471784
commit 32a3914
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Showing 2 changed files with 8 additions and 3 deletions.
diff --git a/frameworks/Ruby/rack/config/auto_tune.rb b/frameworks/Ruby/rack/config/auto_tune.rb
@@ -8,7 +8,7 @@
 require 'etc'
 
 KB_PER_WORKER = 128 * 1_024 # average of peak PSS of single-threaded processes (watch smem -k)
-MIN_WORKERS = 15
+MIN_WORKERS = 2
 MAX_WORKERS_PER_VCPU = 1.25 # virtual/logical
 MIN_THREADS_PER_WORKER = 1
 MAX_THREADS = Integer(ENV['MAX_CONCURRENCY'] || 256)

diff --git a/frameworks/Ruby/rack/hello_world.rb b/frameworks/Ruby/rack/hello_world.rb
@@ -54,8 +54,13 @@ class HelloWorld
   </html>'
 
   def initialize
-    # auto_tune
-    max_connections = 512
+    if defined?(Puma)
+      max_connections = auto_tune.reduce(:*)
+    elsif defined?(Unicorn)
+      max_connections, = auto_tune
+    else
+      max_connections = 512
+    end
     @db = PgDb.new(DEFAULT_DATABASE_URL, max_connections)
   end