software/fluentd: Add flush_thread_count output option

software/fluentd/buildout.hash.cfg

@@ -14,7 +14,7 @@
 # not need these here).
 [instance-profile]
 filename = instance.cfg
-md5sum = bf8e758b475f4eccc72f93949a16d2c5
+md5sum = a1eb619b5353fe7ca090c7d9a2992df7
 
 [template-fluentd]
 filename = instance-fluentd.cfg

software/fluentd/instance.cfg

@@ -86,6 +86,7 @@ init =
       "  <buffer tag>\n"
       "    flush_mode interval\n"
       "    flush_interval 1m\n"
+      "    flush_thread_count 4\n"
       "    @type file\n"
       "    path %s/\n"
       "  </buffer>\n"