Too many open files Re: Patch 9.4.2->9.4.2-P1 breaking tcp-responder?

[jbratton at rackspace.com]

Quoting Thomas Jacob <jacob at internet24.de>:

> Question: Your initial response regarding not having any problems with
> a TCP queue size set to 1000, did you already have the increase in the
> open file limit in place when you tried this. Or rather, did you
> need to increase both the tcp queue size and the open file limit to get
> to stable situation?

I had already hit the open file limit a long time ago, so I had the  
max open files set higher before 9.4.2-P1 even came out.  Then when I  
had all the problems with TCP queries, that was when I set the  
tcp-listen-queue variable.  And like I mentioned before, this only  
happens on caching resolvers that are doing at least 1000  
queries/second, even though I increased the variables across all of  
our caches just in case.  So out of over 40 caching nameservers, we  
only have 2 or 3 that crash, but they do so every day or so.

-- Jason


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