Error "socket: too many open file descriptors" On DNS Server (Doc ID 844771.1)

Last updated on NOVEMBER 07, 2011

Applies to:

Linux OS - Version: Oracle Linux 5.3 and later   [Release: OL5U3 and later ]
Linux x86
Linux x86-64
Linux Kernel - Version: 5.3

Symptoms

Running a DNS server on OEL5, when DNS server has to handle large amount of queries per second it can show the following error:

socket: too many open file descriptors

The performance is pretty bad and many queries fail.


Cause

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