[squid-users] too much TCP_MISS
Hi All, I setup squid on centos 6 for cache gain purpose and for that i configured squid.I am not having any problem while installing and configuring squid on Linux. But when i try to check caching is happening or not or checking traffic in access.log i can see too many TCP_MISS tags. Even for testing , i try to open same url for 2-3 times , but all time same , i can see TCP_MISS only for all requests from that site. --- squid.conf: # # Recommended minimum configuration: # acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT acl mynetwork src '/etc/squid/mynetwork' acl youtube dstdomain .youtube.com cache allow youtube # # Recommended minimum Access Permission configuration: # # Only allow cachemgr access from localhost http_access allow manager localhost http_access deny manager # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on localhost is a local user #http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow mynetwork http_access allow localhost # And finally deny all other access to this proxy http_access deny all # Squid normally listens to port 3128 http_port 3128 http_port 3129 intercept # We recommend you to use at least the following line. hierarchy_stoplist cgi-bin ? # Uncomment and adjust the following to add a disk cache directory. cache_dir aufs /CACHE 307200 64 512 # Leave coredumps in the first cache dir coredump_dir /CACHE refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i \.(gif|png|jpg|jpeg|ico)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.(iso|avi|wav|mp3|mp4|mpeg|swf|flv|x-flv)$ 43200 90% 432000 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.(deb|rpm|exe|zip|tar|tgz|ram|rar|bin|ppt|doc|tiff)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.index.(html|htm)$ 0 40% 10080 refresh_pattern -i \.(html|htm|css|js)$ 1440 40% 40320 refresh_pattern -i \.flv$ 10080 90% 99 ignore-no-cache override-expire ignore-private refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 40% 40320 cache_mem 2000 MB httpd_suppress_version_string on via off maximum_object_size_in_memory 40 KB maximum_object_size 4194304 KB #maximum_object_size 65536 KB cache_swap_low 96 cache_swap_high 97 memory_replacement_policy lru cache_replacement_policy heap LFUDA quick_abort_min 1024 KB quick_abort_max 2045 KB quick_abort_pct 90 positive_dns_ttl 8 hours negative_dns_ttl 0 ipcache_size 2 ipcache_low 95 ipcache_high 97 fqdncache_size 12000 cache_store_log /var/log/squid/store.log pipeline_prefetch on I can only see TCP_MISS. What could be the reason ? Is there any misconfiguration or ? Please guide me to resolve this problem. squid version: 3.1.8 centos 6 64 bit kernel version: 2.6.32-71.el6.x86_64 Regards, Benjamin Fernandis
Re: [squid-users] too much TCP_MISS
On 26/10/11 19:17, benjamin fernandis wrote: Hi All, I setup squid on centos 6 for cache gain purpose and for that i configured squid.I am not having any problem while installing and configuring squid on Linux. But when i try to check caching is happening or not or checking traffic in access.log i can see too many TCP_MISS tags. Even for testing , i try to open same url for 2-3 times , but all time same , i can see TCP_MISS only for all requests from that site. --- squid.conf: snip acl youtube dstdomain .youtube.com cache allow youtube Squid default (no cache lines) is to cache everything it can, unless you configure cache deny somehow. You have no other cache lines than the one cache allow youtube. The way ACL lines in 3.1 and older are processed there is an implicit policy at the end opposite to the result of the final access line. = Therefore the implicit default after allow youtube is cache deny all. So allow youtube does nothing but create your problem. Remove and you will get a better view of what can be cached and what has problems. snip # We recommend you to use at least the following line. hierarchy_stoplist cgi-bin ? # Uncomment and adjust the following to add a disk cache directory. cache_dir aufs /CACHE 307200 64 512 Um, 300GB in a single cache area. What exactly is your avg object size? (2^27) * N = maximum useful cache size. # Leave coredumps in the first cache dir coredump_dir /CACHE refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i \.(gif|png|jpg|jpeg|ico)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.(iso|avi|wav|mp3|mp4|mpeg|swf|flv|x-flv)$ 43200 90% 432000 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.(deb|rpm|exe|zip|tar|tgz|ram|rar|bin|ppt|doc|tiff)$ 10080 90% 43200 override-expire ignore-no-cache ignore-no-store ignore-private refresh_pattern -i \.index.(html|htm)$ 0 40% 10080 refresh_pattern -i \.(html|htm|css|js)$ 1440 40% 40320 refresh_pattern -i \.flv$ 10080 90% 99 ignore-no-cache override-expire ignore-private refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 40% 40320 ignore private and no-store. really? They are very often marked private and never to be saved to disk for good reason. Be very, very careful with sharing private web objects to others. .tiff for example are mostly used by online medical systems for sharing things like x-rays and scans results. Critical systems requiring the extremely accurate (and private) high definition images. I suggest removing these again and completely re-assessing whether you need any of them once you have the above change to cache lines fixed. cache_mem 2000 MB httpd_suppress_version_string on via off maximum_object_size_in_memory 40 KB maximum_object_size 4194304 KB Go on: maximum_object_size 4 GB snip I can only see TCP_MISS. What could be the reason ? Is there any misconfiguration or ? Please guide me to resolve this problem. squid version: 3.1.8 centos 6 64 bit kernel version: 2.6.32-71.el6.x86_64 Regards, Benjamin Fernandis Amos -- Please be using Current Stable Squid 2.7.STABLE9 or 3.1.16 Beta testers wanted for 3.2.0.13
