Re: [squid-users] Squid stops responding-LTSP and WinXP clients

On Thu, Sep 10, 2009 at 10:54 AM, Avinash Rao <avinash.aol_at_gmail.com> wrote:
> On Wed, Sep 9, 2009 at 5:45 PM, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
>> Avinash Rao wrote:
>>>
>>> Dear all,
>>>
>>> I am sure this question would have been posted many times. I read a
>>> few threads, but my requirement or setup is a bit different. I am
>>> running Squid2.6stable18 on Ubuntu Server 8.04 Server 64-bit installed
>>> on Sun Fire X4150 Server with 8GB RAM + 8 SAS HDD's - RAID 5 + 2 Quad
>>> Core Intel Xeon Processors.
>>>
>>> I have both LTSP and WinXP clients using Squid. Many times i have
>>> noticed, squid stops responding, the browser keeps trying to connect
>>> and i don't see any error in cache.log or store.log. My only way out
>>> is to restart squid.
>>
>> Usually means Squid is doing something with its on-disk storage.
>>
>>>
>>> I read through cache_mem, my current configuration is 100MB,  i
>>> changed it to 128MB, but squid couldn't start saying the cache_mem is
>>> more than cache_disk size.
>>>
>>> Why does this happen and what is the recommended configuration for the
>>> hardware i have?
>>
>> You are missing a cache_dir option. Which means Squid-2 will be using the
>> default and very inefficient 100 MB ufs formatted storage.
>>
>> Squid-3.1 and later are the only releases of Squid where cache_dir can be
>> fully removed from the config.
>>
>> Either define a cache_dir to use the disks or setup the "null" cache_dir
>> type for memory-only storage.
>>
>>>
>>> squid.conf: Please donot compare this config to my other posts, as
>>> this is on a different server and it has a very basic configuration.
>>>
>>> visible_hostname sunserver
>>> hierarchy_stoplist cgi-bin ?
>>> acl QUERY urlpath_regex cgi-bin \?
>>> no_cache deny QUERY
>>
>> Drop 'no_cache' use instead:
>>  cache deny QUERY
>>
>>> hosts_file /etc/hosts
>>> http_port 10.10.10.10:3128
>>> 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 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 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 631               # cups
>>> acl Safe_ports port 777               # multiling http
>>> acl Safe_ports port 901               # SWAT
>>> acl Safe_ports port 993               # IMAP
>>> acl Safe_ports port 587               # SMTP
>>> acl Safe_ports port 22                # SSH
>>> acl purge method PURGE
>>> acl special_urls url_regex "/etc/squid/squid-noblock.acl"
>>> acl extndeny url_regex -i "/etc/squid/blocks.files.acl"
>>> acl malware_block_list url_regex -i "/etc/squid/malware_block_list.txt"
>>> acl badurl url_regex -i teen orkut youtube sex mp3 mp4
>>> acl lan src 10.10.10.0/24
>>> acl stud ident_regex babu
>>> acl download method GET
>>> acl CONNECT method CONNECT
>>> cache_mem 100 MB
>>> ident_lookup_access allow all
>>> deny_info http://malware.hiperlinks.com.br/denied.shtml malware_block_list
>>> http_access allow manager localhost
>>> http_access deny manager
>>> http_access allow purge localhost
>>> http_access allow special_urls
>>> http_access deny extndeny download
>>> http_access deny extndeny
>>> http_access deny purge
>>> http_access deny !Safe_ports
>>> http_access deny CONNECT !SSL_ports
>>> http_access deny badurl
>>> http_access deny malware_block_list
>>> http_access allow localhost
>>> http_access allow lan
>>> http_access deny all
>>> http_reply_access allow all
>>> icp_access allow all
>>> coredump_dir /var/spool/squid
>>>
>>>
>>> Many Thanks
>>> Avinash
>>
>>
>> --
>> Please be using
>>  Current Stable Squid 2.7.STABLE6 or 3.0.STABLE18
>>  Current Beta Squid 3.1.0.13
>>
>
> Thank you all for the information. I read the documentation.
> To begin with I have set cache_dir to 256MB and cache_mem also to 256
> MB. Which takes the precedence? I guess the pages are stored/retrieved
> from the RAM. Does this setting mean that, once 256MB is reached in
> RAM it will start storing the pages in cache_dir?
>
> Thanks,
> Avinash
>

Hi Guys,

I just tested it, but it was pretty slow, the page was not loading
only. Strange coz,
the cache_mem is increased to 256MB and its still slow? How does this work?
According to the squid Documentation, i recommended size for cache_dir
is 7000 or 8000!

I set cache_dir to null /tmp and i could see a lot of difference and
it worked pretty well.

Thanks
Avinash
Received on Thu Sep 10 2009 - 06:05:45 MDT