From: Grant Slater <git@firefishy.com>
Date: Sat, 8 Feb 2014 06:43:27 +0000 (+0000)
Subject: nadder: Decrease scheduler queue depth to improve latency
X-Git-Url: https://git.openstreetmap.org/chef.git/commitdiff_plain/78e29ff52119417c16425562cead9eb4c77bc1ea?ds=sidebyside

nadder: Decrease scheduler queue depth to improve latency
---

diff --git a/roles/nadder-01.rb b/roles/nadder-01.rb
index 8eb9d562f..d596a1a6e 100644
--- a/roles/nadder-01.rb
+++ b/roles/nadder-01.rb
@@ -18,8 +18,8 @@ default_attributes(
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
       :parameters => {
-        "block/vda/queue/nr_requests" => "512",
-        "block/vdb/queue/nr_requests" => "512",
+        "block/vda/queue/nr_requests" => "64",
+        "block/vdb/queue/nr_requests" => "64",
         "block/vda/queue/scheduler" => "deadline",
         "block/vdb/queue/scheduler" => "deadline"
       }
diff --git a/roles/nadder-02.rb b/roles/nadder-02.rb
index 9141e2a73..07c2c7145 100644
--- a/roles/nadder-02.rb
+++ b/roles/nadder-02.rb
@@ -18,8 +18,8 @@ default_attributes(
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
       :parameters => {
-        "block/vda/queue/nr_requests" => "512",
-        "block/vdb/queue/nr_requests" => "512",
+        "block/vda/queue/nr_requests" => "64",
+        "block/vdb/queue/nr_requests" => "64",
         "block/vda/queue/scheduler" => "deadline",
         "block/vdb/queue/scheduler" => "deadline"
       }