Hello, We've installed squid as an accelerator for our website, and it's working pretty well, but we have found out that the collapsed forwarding is not working as expected. We ran some load tests to a single url with a 1 minute expiry and squid is still sending approximately 12000 request to the back end server in a 5 minute span. If I understand the documentation correctly, squid should only send 5 requests to the back end server. I've configured the following. http_port 80 accel defaultsite=<site name> vhost cache_peer <web server> parent 80 7 no-query no-digest originserver sourcehash monitorurl=/statuscheck/ name=<web server> http11 ... acls ... header access cache_mem 3072 MB maximum_object_size_in_memory 5000 KB cache_replacement_policy heap LFUDA cache_dir aufs /var/cache/squid/disk0 4096 16 256 cache_dir aufs /var/cache/squid/disk1 4096 16 256 cache_dir aufs /var/cache/squid/disk2 4096 16 256 cache_dir aufs /var/cache/squid/disk3 4096 16 256 cache_dir aufs /var/cache/squid/disk4 4096 16 256 cache_dir aufs /var/cache/squid/disk5 4096 16 256 cache_dir aufs /var/cache/squid/disk6 4096 16 256 cache_dir aufs /var/cache/squid/disk7 4096 16 256 cache_dir aufs /var/cache/squid/disk8 4096 16 256 cache_dir aufs /var/cache/squid/disk9 4096 16 256 cache_dir aufs /var/cache/squid/disk10 4096 16 256 refresh_pattern . 1 20% 1400 stale-while-revalidate=86400 max-stale=60 ignore-reload collapsed_forwarding on refresh_stale_hit 60 seconds Can someone help with debugging and fixing this? We're using squid 2.7STABLE9 Steve.