This is a discussion on Re: Too many open files Re: Patch 9.4.2->9.4.2-P1 breakingtcp-responder? - DNS ; Quoting Thomas Jacob : > 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 ...
Quoting Thomas Jacob
> 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.
Confidentiality Notice: This e-mail message (including any attached or
embedded documents) is intended for the exclusive and confidential use of the
individual or entity to which this message is addressed, and unless otherwise
expressly indicated, is confidential and privileged information of Rackspace.
Any dissemination, distribution or copying of the enclosed material is prohibited.
If you receive this transmission in error, please notify us immediately by e-mail
at email@example.com, and delete the original message.
Your cooperation is appreciated.