Re: [squid-users] Re: Strange issues with squid

> We've made changes, and are still having issues - do you think using
> squid3, changing our values, setting squid to run directly on port 80
> (instead of ipfw redirecting 80 to 3128), or running Linux would solve
> the problems (this is on FreeBSD 6.2)?

I'm not sure if a FreeBSD/Linux chaneg would solve it.
Squid 3.0 has had work done to remove those messages, it's up to you to
decide if the absence of some features is a blocker for you.

Amos

>
> The main log messages we're getting are "httpReadReply: Excess data
> from" and "httpReadReply: Request not yet fully sent".
>
> Here's our changes:
> Kernel:
> Removed the NET_WITH_GIANT option, since aio supposedly works fine
> without it (this was turned on before)
> Added DEVICE_POLLING, which uses the interface polling method instead of
> standard interrupt routines for network interfaces
>
> added these to /etc/sysctl.conf:
> net.inet.tcp.rfc1323=0
> net.inet.tcp.mssdflt=1460
> net.inet.tcp.slowstart_flightsize=27
> net.inet.tcp.hostcache.expire=3900
> kern.polling.burst_max=1000
> kern.polling.idle_poll=0
> kern.polling.each_burst=50
>
> added these to /boot/loader.conf (for increasing the host cache table)
> net.inet.tcp.tcbhashsize="4096"
> net.inet.tcp.hostcache.hashsize="1024"
>
> the MTU for the GRE interfaces is set to 1514 in the rc.gre script
> polling is turned on in /etc/rc.conf for the em0 interface
>
>
> Ryan Thoryk
> System Administrator
> onShore Networks, LLC
>
> Ryan Thoryk wrote:
>> One thing I found was that the MTU of the GRE interfaces was different
>> than the MTU on the routers. I fixed that and am currently testing it.
>>
>> Adrian Chadd wrote:
>>> What you want to do is try and find a tcpdump capture for the broken
>>> HTTP flows.
>>>
>>> I'd make sure window scaling is disabled, ECN is disabled and I'd
>>> change the default route TCP MSS to be < 1500 (say, 1400 or 1300.)
>>> Make sure if you use GRE then the route GRE is using is 1500. :)
>>>
>>> (I'm playing around with tproxy at home and I'm having slow loading
>>> issues;
>>> I have a feeling I'm seeing PMTU related issues. Hm.)
>>>
>>>
>>>
>>> Adrian
>>>
>>
>>
>
>
Received on Thu Jan 17 2008 - 16:21:13 MST