I was correct . If one of following conditions happens then the mentioned urls will not cache . 1-in squid.conf have this line acl storeiddomainregex dstdom_regex ^igcdn(\-photos|\-videos)[a-z0-9\-]{0,9}\.akamaihd\.net$ 2-in storeid_db have this line ^http:\/\/igcdn-.*\.akamaihd\.net/hphotos-ak-.*/(t5.*?)(?:\?|$) http://instagramcdn.squid.internal/$1 IF 1 OR 2 THEN http://igcdn-photos-h-a.akamaihd.net/hphotos-ak-xap1/t51.2885-15/s640x640/sh0.08/e35/13702999_1008425479275495_76276919_n.jpg will not cache at all even if we open that url for many times . But if i remove 1 and 2 then the url will be cached . My first email was incorrect because i realized that first url is hit but second miss . The hit was from before store_id rules added . Now the problem is with my mentioned squid.conf and store_id rules , the mentioned urls will not cache at all.Even if same url reopens many times . Thanks -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Yet-another-store-id-question-HIT-MISS-tp4678972p4679025.html Sent from the Squid - Users mailing list archive at Nabble.com. _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users