nginx - Mapcache が WMS をキャッシュしない

Question

ubuntuにmapcache、mapserver（WMS）、nginxがあります。私の指示:

    http://mapserver.org/id/mapcache/install.html#cgi-fastcgi-specific-instructions

Nginx *.conf:

    location ~ ^/maps/ofp_10000(?<path_info>/.*|$) {
        set $url_prefix "/maps/ofp_10000";
        mapcache /mapcache/ofp.xml;
        error_page 404 = @fastcgi_mapcache;
    }

   location @fastcgi_mapcache {
        fastcgi_pass 127.0.0.1:9001;
        fastcgi_index mapserv;
        fastcgi_param QUERY_STRING   map=/ofp_10000/vrt_all.map&$query_string;
        fastcgi_param REQUEST_METHOD $request_method;
        fastcgi_param CONTENT_TYPE   $content_type;
        fastcgi_param CONTENT_LENGTH $content_length;
        fastcgi_param SERVER_NAME    $server_name;
        fastcgi_param SERVER_PORT    $server_port;
        fastcgi_param PATH_INFO      $path_info;
        fastcgi_param SCRIPT_NAME    "/maps/ofp_10000";
     }

ofp.xml:

   <mapcache>
         <cache name="tmp1" type="disk" layout="template">
                <template>/tmp/mapcache/{tileset}#{grid}#{dim}/{z}/{x}/{y}.{ext}</template>
        </cache>

       <source name="vmap0" type="wms">
               <getmap>
                <params>
                   <FORMAT>image/jpeg</FORMAT>
                   <LAYERS>vrt_all</LAYERS>
               </params>
             </getmap>

           <http>
             <url>http://host/maps/ofp_10000?</url>
           </http>
     </source>

    <tileset name="vrt_all">
            <source>vmap0</source>
            <cache>tmp1</cache>
            <grid>WGS84</grid>
            <grid>g</grid>
            <format>JPEG</format>
            <metatile>2 2</metatile>
            <metabuffer>10</metabuffer>
            <expires>10000</expires>
            <auto_expire>86400</auto_expire>
     </tileset>

     <default_format>JPEG</default_format>

     <service type="wms" enabled="true">
          <full_wms>assemble</full_wms>
           <resample_mode>bilinear</resample_mode>
         <format>JPEG</format>
         <maxsize>4096</maxsize>
    </service>
    <service type="wmts" enabled="true"/>
    <service type="tms" enabled="true"/>
    <service type="kml" enabled="true"/>
    <service type="gmaps" enabled="true"/>
    <service type="ve" enabled="true"/>
    <service type="mapguide" enabled="true"/>
    <service type="demo" enabled="true"/>

    <errors>report</errors>
    <log_level>warn</log_level>
    <lock_retry>10000</lock_retry>
    <lock_dir>/tmp</lock_dir>
     <auto_reload>false</auto_reload>

  </mapcache>

の

  http://host/maps/ofp_10000/demo/wms

私の WMS は正常に動作していますが、キャッシュはしていません - /tmp/mapcache は空です。

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