nominatim: chef up kernel scheduler tuning

[chef.git] / roles / nominatim.rb

diff --git a/roles/nominatim.rb b/roles/nominatim.rb
index ccb9cf0d5120b21b68923e1324dcbaf422192098..8e3ed5d0b29e83cca388398791583fcdfa405286 100644 (file)
--- a/roles/nominatim.rb
+++ b/roles/nominatim.rb
@@ -17,8 +17,9 @@ default_attributes(
     :timeout => 60,
     :keepalive => false,
     :event => {
-      :max_clients => 560,
-      :threads_per_child => 35
+      :server_limit => 32,
+      :max_clients => 800,
+      :threads_per_child => 50
     }
   },
   :apt => {
@@ -41,8 +42,15 @@ default_attributes(
     :postgres => {
       :comment => "Increase shared memory for postgres",
       :parameters => { 
-        "kernel.shmmax" => 16 * 1024 * 1024 * 1024,
-        "kernel.shmall" => 16 * 1024 * 1024 * 1024 / 4096
+        "kernel.shmmax" => 26 * 1024 * 1024 * 1024,
+        "kernel.shmall" => 26 * 1024 * 1024 * 1024 / 4096
+      }
+    },
+    :kernel_scheduler_tune => {
+      :comment => "Tune kernel scheduler preempt",
+      :parameters => {
+        "kernel.sched_min_granularity_ns" => 10000000,
+        "kernel.sched_wakeup_granularity_ns" => 15000000
       }
     }
   },