Re: [squid-users] waiting for Henrick's Reply

Hi henrick
i had mailed to this saying that both the child and the parent hv debug
level 2 enabled
then why is that i get "Resource temporarily available" errors only in
the child's proxy cache.log file ( where users connect) and not in the
parent's cache.log file
btw is this a serious message so as to stall squid from accepting
further connections under load????
pls do get back
i know i m becoming sort of a nuisance to the list ... but there is no
one else who can possibly help me out !!!!! ;-)
so waiting for ur replies
Khiz

--- Henrik Nordstrom <hno@hem.passagen.se> wrote:
> khiz code wrote:
>
> > browser used child proxy as its proxy
> > cache.log reports
> > a > of child proxy
> > after almost every request we get the same
> > 2001/08/21 11:05:56| clientReadRequest: FD 17: no data to process
> > ((11) Resource
> > temporarily unavailable
> > b> cache.log of parent proxy
> > NO SUCH "Resource unavail Messages"
> > not even once !!!!
>
> Not nessesarily. Anyway, as I said the message is fairly expeced, and
> is
> only printed if you enable more detailed debugging than the default
> ALL,1.
>
> > under load i cpatured netstat -an
> > then did grep SYN_RECV | wc -l
> > the o/p was abt 1024 to 1030
> > this is at putting the machine atload for not more than 10 mins
> > does this indicate a SYN flood
> > do i need to increase tcp_max_syn_backlog in /proc
> > or do i need to change tcp_syncookies
>
> If you have large amounts of SYN_RECV you for sure have a problem
> with
> SYNs. Possibilities:
>
> a) Someone is SYN flooding your server
>
> b) You have some networking problem, causing return traffic for
> some/many
> clients to get lost
>
> To diagnose further, try to figure out is there is any pattern in the
> source IP's of the SYN_RECV sockets.
>
> --
> Henrik Nordstrom
> Squid Hacker
>

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Received on Thu Aug 23 2001 - 07:43:07 MDT