We've recently setup "New Relic" on our web server. This is a great tool to measure full-stack performance.
The problem is we cannot get to run New relic for more than 10-15 minutes during our peak times. For some reason our website stops responding. And we have to stop the new relic daemon to bring the web server up (Apache).
An important log file for New Relic is "newrelic-daemon.log". This log shows the following line just before things come to a halt:
"2012-02-09 22:01:29 [26035/timer] error: RPM command 'metric_data' failed(6): Couldn't resolve host 'collector-7.newrelic.com'"
So I'm thinking the problem is with our own server. Where should I look to further investigate the problem?
search ourdomain.com nameserver 220.127.116.11 nameserver 18.104.22.168