We've been getting an average of 40+/day of these messages from the caching nameserver process on one of our Xymon/Devmon servers:
named[N]: sockmgr 0xN: maximum number of FD events (64) received
This server is running bind-9.3.6-16.P1 (old, I know, but it's the latest for the distro we are using). I was wondering if anyone else out there was seeing the same errors? I'm making an assumption that Xymon/Devmon (or one of our ext scripts) might be inducing this condition, since this server doesn't have any other processes on it that would be doing a large amount of DNS lookups. This server has over 600 entries in hosts.cfg and 92 entries in the Devmon hosts.db. I have tried reproducing the problem by making a large amount of DNS lookups as simultaneously as possible, but with no luck. The xymonnet status only lists 42 failed DNS lookups out of 797 calls to dnsresolve. Any suggestions on how to find out what specific process is causing named to make periodic high demands for sockets?
-- S i m e o n B e r k l e y
Systems Engineer McClatchy Interactive phone: 919-861-1244 fax: 919-861-1300 mobile: 919-302-3063 e-mail: sberkley at mcclatchyinteractive.com AIM: sberkleymi www.mcclatchyinteractive.com