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Re: Howto Clear Cache Periodicaly

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On Tue, 2006-04-11 at 14:51 +0100, Neil A. Hillard wrote:
> Hi,
> 
> 	mail reformatted to make sense (i.e. please don't top post!)
> 
> >>> I have a squid that has been caching for like 10 month. It now have an
> >>> amazing size of 4.5 gig.
> >> What you have is determined by the cache_dir specifications
> >> in squid.conf. The size there is taken into account , and SQUID will
> >> trimm cache dirs automatically if that would be needed.
> >>
> >>
> >>> When browsing on the web, it is now very very
> >>> slow. I restarted squid with a clean cache. Everything was fine again. I
> >>> was wondering if there were a way to tell squid to clean cache
> >>> periodicaly?! So I would not have to do it myself.
> >>>
> >>  - The idea of a caching proxy is to have a cache, and to benefit
> >> from that, not clean it.
> >> I run SQUID with the same cache dir and or squid maintained content
> >> for more then year without touching it.
> >> And or touching it alone, if serious SYSTEM or disk problems would occur.
> >>
> >> Make sure that your disk access performance, for instance, is adequate
> >> for the SQUID induced disk I/O load.
>  >
> > For the computer that is running Squid it is a Dual core 3 ghz, there
> > is 2 gig of ram. The disk are scsi. I don't think that it is the
> > machine that is having the probleme. There is no probleme with the
> > access to disk.
> 
> If you want better advice you'll need to show here how you've checked 
> that.  Have you used iostat, vmstat, etc.  You may also want to post you 
> squid.conf (stripped of comments and blank lines).
> 
> Do you have multiple cache_dirs specified?
> 
> > There might be solution somewhere. I mean I should not have to reset
> > my cache. The computer is strong enough. But still it went really
> > slow (so slow that browsing the web was imposible)and restarting
> > squid with a new cache solved the problem. What can I do to be sure
> > that this does not happen again
> 
> Correct - you should not have to.  After all, I have a dual P3-667MHz 
> with 512Mb RAM serving over 3500 clients.  Your machine is considerably 
> more powerful.
> 
> What is the machine doing when it is in this state.  Is anything logged 
> in cache.log, anything relevant in syslog?
> 
> 
> Without more information we can't really offer any advice.
> 
> 
> 				Neil.
> 

---

Here is my squid.conf

pid_filename /opt2/squid-logs/squid.pid
redirect_program /usr/local/squid/bin/zapchain /usr/local/squid/bin/squidGuard 
	"/usr/local/squid/bin/SquidClamAV_Redirector.py
	-c /usr/local/squid/etc/SquidClamAV_Redirector.conf"
redirect_children 30
acl localhost src 127.0.0.1/255.255.255.255
acl proxycsbf src 10.0.10.15/255.255.255.255
redirector_access deny proxycsbf
redirector_access deny localhost
auth_param basic children 5
auth_param basic realm Squid proxy-caching web server
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive off
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern .               0       20%     4320
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 563
acl Safe_ports port 80          # 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
acl our_networks src 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
http_access allow our_networks
http_access deny all
http_reply_access allow all
icp_access allow all
cache_mgr ""
cache_effective_user squid
cache_effective_group squid
visible_hostname ""
err_html_text toot@xxxxxxxxx
forwarded_for off
cachemgr_passwd *******
error_directory /usr/local/squid/share/errors/French
coredump_dir /usr/local/squid/var/cache

---

> What is the machine doing when it is in this state.  Is anything logged 
> in cache.log, anything relevant in syslog?

Says too much file open in the cache or something like that.

---

I'm up to try anything 
Thanks in advance!


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