Hello Amos: i catch these info via firebug just now , I don't whether these info is correct , but i hope to reduce refresh time via analying the warning info . Best Regard Access-Control-Allow-Orig... * Age 18049066 Cache-Control max-age=315360000 Content-Length 252 Content-Type image/png Date Wed, 19 Aug 2015 08:49:41 GMT Expires Sat, 16 Aug 2025 08:49:41 GMT Last-Modified Tue, 05 May 2015 09:12:34 GMT Server Tengine Timing-Allow-Origin * Via cache1.l2ot7[0,200-0,H], cache21.l2ot7[11,0], cache5.us4[0,200-0,H], cache1.us4[0,0] Warning 113 squidcache2 (squid/3.5.2) This cache hit is still fresh and more than 1 day old X-Cache HIT TCP_MEM_HIT dirn:10:654378664, HIT from squidcache eagleid 42c618c914573689378574924e x-swift-cachetime 304669034 x-swift-savetime Mon, 21 Dec 2015 02:32:27 GMT _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users