Hi all, I am using with following compilation. [root@staffproxy ~]# squid -v Squid Cache: Version LUSCA_HEAD-r14809 configure options: '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/sbin' '--libexecdir=/usr/lib/squid' '--localstatedir=/var' '--sysconfdir=/etc/squid' '--enable-delay-pools' '--disable-arp-acl' '--enable-linux-netfilter' '--enable-large-cache-files' '--enable-cache-digests' '--enable-external-acl-helpers=ip_user' '--disable-ident-lookups' '--enable-removal-policies=heap,lru' '--enable-snmp' '--disable-ssl' '--enable-storeio=aufs,coss' '--enable-err-languages=English' '--with-aio' '--with-maxfd=1048576' '--with-dl' '--with-pthreads' '--with-large-files' '--disable-unlinkd' I discovers that when I enable the delay pool in my configuration which looks like ========== delay_pools 1 delay_class 1 2 acl downloads url_regex -i .mp3 .avi .mpeg .wmv .exe .zip .dat .rm .rmvb .mpg .mp4 .3gp .qt .wma .mov .ram .rar .mpe .iso .doc$ .tar .rpm .msi .flv .swf .torrent .bin .tar.gz .deb .tar.bz .nrg .asf .vcd .yps .gam .img .cdi .mdf .lcd .vob .wim .3gpp .3gpp2 .asx .avs .az .divx .hdmov .m2p .ogm .rts .rtsp .rv .vid .wm .psf .7z .cab delay_access 1 allow downloads delay_access 1 deny all delay_parameters 1 128000/128000 -1/-1 +++++++++++++++++++++++++++++++++++++ I got very delay response to the sites of advertisement in particular and the other site in general. But when I remove the delay pool the squid response to the browser tremendously increase. Further I am using "xfs" as file system for my cache with Disk I/O scheduler of deadline. Please help me resolve this. BR Farooq