Caching DNS server (bind9.2) CPU usage is so so so high
- by Gk.
I have a caching-only dns server which get ~3k queries per second. Here is specs:
Xeon dual-core 2,8GHz 4GB of RAM
Centos 5x (kernel 2.6.18-164.15.1.el5PAE)
bind 9.4.2
rndc status:
recursive clients: 666/4900/5000
About 300 new queries (not in cache) per second.
Bind always uses 100% on one core on single-thread config. After I recompiled it…