Re: [squid-users] [Help] Reverse Proxy: suspend bulk requests for invalid urls

Hi, I checked that "negative_ttl" and it's definitely not in my squid.conf :)
And, I'm also checking our orignial servers for 404 and 30x return
codes if they don't work properly.
I have one more question for sure: Will Squid remembers invalid URLs
(for moment) and return the error page without validating those
invalid URLs against original servers ?

Thank you, Amos
Kien Le.

On Tue, May 10, 2011 at 7:27 PM, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
> On 10/05/11 20:58, Le Trung Kien wrote:
>>
>> Hi, we're trying Squid v3 for reverse proxy using, and explore that we
>> receive too many access requests for old invalid URLs from client and
>> this makes our Squid Caches slow down our original servers by
>> attempting sending requests to retrieve information from original
>> servers.
>>
>> This is from our squid cache.log:
>>
>> WARNING: HTTP: Invalid Response: No object data received for
>> invalid_urls AKA invalid_urls
>>
>> I have questions that:
>> Is there any way to delay or suspend squid's responding for these
>> repeated requests after certain times squid cannot retrieve content
>> for invalid URLs and return a default error page ?
>
> First, make sure that "negative_ttl" directive is *absent* from your
> squid.conf
>
> Then fin out why your origin servers are producing garbage instead of a 404
> or 30x reply like they should be.
>
> Squid is capable and will cache both 404 replies and 30x redirects if the
> origin sets the headers correctly to allow caching. ie Expires: header a
> year in the future, or Last-Modified some time in the past with storage
> friendly Cache-Control: values.
>
> Amos
> --
> Please be using
>  Current Stable Squid 2.7.STABLE9 or 3.1.12
>  Beta testers wanted for 3.2.0.7 and 3.1.12.1
>
Received on Wed May 11 2011 - 03:02:07 MDT