Are you using logs on the bind machine\s? Eliezer
On 03/25/2014 04:31 PM, Jason Brandt wrote:
We recently migrated to BIND for our internal resolvers, and since the migration, we are experiencing periods of high recursive client counts, which will at times cause the BIND server to quit responding. As a workaround, I've been able to point the BIND server to a forwarder, bypassing the root hints, to restore stability, but this morning even with the forwarder, our count spiked. We are using Ubuntu 12.04 LTS, BIND version 9.8.1-P1. The server is configured strictly as a resolver, and is not authoritative for any domains. We have approximately 15-20k client devices on campus. Our average recursive client count is between 10 and 50. When the spikes occur, counts will get upwards of 3-4k (this morning: recursive clients: 2358/9900/10000). What are possible causes of high recursive client count? What can be done to prevent this or tune around it? Obviously raising the max clients doesn't solve the problem, and the forwarder seemed to help, but apparently is still susceptible to the issue. Any suggestions would be greatly appreciated. -- Jason K. Brandt Systems Administrator _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
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