Re: [squid-users] Mem Cache flush

G'day,

A few notes.

* Diskd isn't stable, and won't be until I commit my next set of patches
  to 2.7 and 3.0; use aufs for now.

* Caching windows updates will be possible in Squid-2.7. It'll require some
  rules and a custom rewrite helper.

* 3.0 isn't yet as fast as 2.6 or 2.7.

Adrian

On Tue, Feb 12, 2008, pokeman wrote:
>
> Well I experience with squid cache not good works on heavy load I 4 core
> processor machine with 7 scsi drives 4 gb ram average work load in peak
> hours 3000 users 30 mb bandwidth on that machine using RHEL ES 4. I search
> many articles on high cache performance specially windows update these days
> very headache to save PSF extension i heard In squid release 3.0 for better
> performance but why squid developers could???nt find solution for cache
> windows update in 2.6 please suggest me if I am doing something wrong in my
> squid.conf
>
>
> http_port 3128 transparent
> range_offset_limit 0 KB
> cache_mem 512 MB
> pipeline_prefetch on
> shutdown_lifetime 2 seconds
> coredump_dir /var/log/squid
> ignore_unknown_nameservers on
> acl all src 0.0.0.0/0.0.0.0
> acl ourusers src 192.168.100.0/24
> hierarchy_stoplist cgi-bin ?
> maximum_object_size 16 MB
> minimum_object_size 0 KB
> maximum_object_size_in_memory 64 KB
> cache_replacement_policy heap LFUDA
> memory_replacement_policy heap GDSF
> cache_dir diskd /cache1 7000 16 256
> cache_dir diskd /cache2 7000 16 256
> cache_dir diskd /cache3 7000 16 256
> cache_dir diskd /cache4 7000 16 256
> cache_dir diskd /cache5 7000 16 256
> cache_dir diskd /cache6 7000 16 256
> cache_dir diskd /cache7 7000 16 256
> cache_access_log none
> cache_log /var/log/squid/cache.log
> cache_store_log none
> dns_nameservers 127.0.0.1
> refresh_pattern windowsupdate.com/.*\.(cab|exe|dll) 43200 100% 43200
> refresh_pattern download.microsoft.com/.*\.(cab|exe|dll) 43200 100% 43200
> refresh_pattern au.download.windowsupdate.com/.*\.(cab|exe|psf) 43200 100%
> 43200
> refresh_pattern ^ftp: 1440 20% 10080
> refresh_pattern ^gopher: 1440 0% 1440
> refresh_pattern cgi-bin 0 0% 0
> refresh_pattern \? 0 0% 4320
> refresh_pattern . 0 20% 4320
> negative_ttl 1 minutes
> positive_dns_ttl 24 hours
> negative_dns_ttl 1 minutes
> acl manager proto cache_object
> acl localhost src 127.0.0.1/255.255.255.255
> acl to_localhost dst 127.0.0.0/8
> acl SSL_ports port 443 563
> acl Safe_ports port 1195 1107 1174 1212 1000
> acl Safe_ports port 80 # http
> acl Safe_ports port 82 # http
> acl Safe_ports port 81 # http
> acl Safe_ports port 21 # ftp
> acl Safe_ports port 443 563 # https, snews
> 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
> http_access allow manager localhost
> http_access deny manager
> http_access deny !Safe_ports
> http_access deny CONNECT !SSL_ports
> http_access allow ourusers
> http_access deny all
> http_reply_access allow all
> cache allow all
> icp_access allow ourusers
> icp_access deny all
> cache_mgr info@fariya.com
> visible_hostname CE-Fariya
> dns_testnames localhost
> reload_into_ims on
> quick_abort_min 0 KB
> quick_abort_max 0 KB
> log_fqdn off
> half_closed_clients off
> client_db off
> ipcache_size 16384
> ipcache_low 90
> ipcache_high 95
> fqdncache_size 8129
> log_icp_queries off
> strip_query_terms off
> store_dir_select_algorithm round-robin
> client_persistent_connections off
> server_persistent_connections on
> persistent_request_timeout 1 minute
> client_lifetime 60 minutes
> pconn_timeout 10 seconds
>
>
>
> Adrian Chadd wrote:
> >
> > On Thu, Jan 31, 2008, Chris Woodfield wrote:
> >> Interesting. What sort of size threshold do you see where performance
> >> begins to drop off? Is it just a matter of larger objects reducing
> >> hitrate (due to few objects being cacheable in memory) or a bottleneck
> >> in squid itself that causes issues?
> >
> > Its a bottleneck in the Squid code which makes accessing the n'th 4k
> > chunk in memory take O(N) time.
> >
> > Its one of the things I'd like to fix after Squid-2.7 is released.
> >
> >
> >
> > Adrian
> >
> >
> >
>
> --
> View this message in context: http://www.nabble.com/Mem-Cache-flush-tp14951540p15449954.html
> Sent from the Squid - Users mailing list archive at Nabble.com.

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