Hi,all: I have a puzzle with between apache2.2 and squid. I have three apache server with same configuration and only with apache service.And to squid server in front of apache server to cache my websites. (By the way, i used apache1.3 all the time before and working well.) I use apche control cache time.And i set 15days with types of *.js.When I check http reponse , i find all time set is right! HTTP/1.1 200 OK Date: Tue, 18 Dec 2007 03:32:09 GMT Server: Apache/2.2.6 (Unix) Last-Modified: Wed, 14 Nov 2007 08:34:31 GMT ETag: "178505d-16a2-43edf6f31b3c0" Accept-Ranges: bytes Cache-Control: max-age=1296000 Expires: Wed, 02 Jan 2008 03:32:09 GMT Vary: Accept-Encoding,User-Agent Content-Encoding: gzip Content-Length: 1556 Content-Type: application/javascript X-Zip-Status: request=gzip:this; respond=vary Age: 649 But when i check access_log, i found too many request from squid server with *.js types ,and the request so high frequency. 10.0.121.12 - - [18/Dec/2007:11:40:07 +0800] "GET /chinabank.js HTTP/1.1" 200 841 10.0.121.3 - - [18/Dec/2007:11:40:07 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 200 1556 10.0.251.206 - - [18/Dec/2007:11:40:07 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:08 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:09 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:09 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:10 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:10 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.121.3 - - [18/Dec/2007:11:40:11 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:11 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:12 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:12 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:14 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:15 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:16 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.250.217 - - [18/Dec/2007:11:40:16 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.121.12 - - [18/Dec/2007:11:40:17 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:17 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 200 5794 10.0.251.206 - - [18/Dec/2007:11:40:18 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - 10.0.251.206 - - [18/Dec/2007:11:40:19 +0800] "GET /newjs/hexunjs.js HTTP/1.1" 304 - I relly don't how to deal with,Thank you for your help! Is it problem with apache ro squid ?