Merge pull request sous-chefs#188 from hw-cookbooks/work_mem

Check to make sure mem is less than con, set work_mem to 1 otherwise.

recipes/config_pgtune.rb

@@ -194,15 +194,20 @@
 
   # (4) work_mem
   #     Sets the maximum memory to be used for query workspaces.
-  work_mem =
-  { "web" => mem / con,
-    "oltp" => mem / con,
-    "dw" => mem / con / 2,
-    "mixed" => mem / con / 2,
-    "desktop" => mem / con / 6
-  }.fetch(db_type)
-
-  node.default['postgresql']['config']['work_mem'] = binaryround(work_mem*1024*1024)
+  if (mem < con)
+    work_mem =
+    { "web" => mem / con,
+      "oltp" => mem / con,
+      "dw" => mem / con / 2,
+      "mixed" => mem / con / 2,
+      "desktop" => mem / con / 6
+    }.fetch(db_type)
+
+    node.default['postgresql']['config']['work_mem'] = binaryround(work_mem*1024*1024)
+  else
+    log "MAX_CONNECTIONS is greater than Memory allocated. Setting WORK_MEM to 1"
+    node.default['postgresql']['config']['work_mem'] = 1
+  end
 
   # (5) maintenance_work_mem
   #     Sets the maximum memory to be used for maintenance operations.