For me the problem is resolved. It happens when squid reach the maximum FD, squid has more and more requests to process and then it's blocked and very very slow. I have increased system FD to 16K and squid FD to 10K, i haven't the problem since this modification. -- Best regards, Loïc BLOT, UNIX systems, security and network expert http://www.unix-experience.fr Le mardi 28 mai 2013 à 16:01 +0000, Stuart Henderson a écrit : > On 2013-05-17, Alex Rousskov <rousskov@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > On 05/17/2013 01:28 PM, Loïc BLOT wrote: > > > >> I have found the problem. In fact it's the problem mentionned on my > >> last mail, is right. Squid FD limit was reached, but squid doesn't > >> mentionned every time the freeze appear that it's a FD limit > >> problem, then the debug was so difficult. > > > > Squid should warn when it runs out of FDs. If it does not, it is a > > bug. If you can reproduce this, please open a bug report in bugzilla > > and post relevant logs there. > > > > FWIW, I cannot confirm or deny whether reaching FD limit causes what > > you call an infinite loop -- there was not enough information in your > > emails to do that. However, if reaching FD limit causes high CPU > > usage, it is a [minor] bug. > > I've just hit this one, ktrace shows that it's in a tight loop doing > sched_yield(), I'll try and reproduce on a non-production system and open > a ticket if I get more details.. > >
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