On 4/25/2010 10:23 PM, Trần Trọng Tấn wrote:
Hi, I have a caching-only dns server which get ~3k queries per second.
Here is specs:
|Xeon dual-core2,8GHz 4GB of RAM
Centos 5x 32bit(kernel2.6.18-164.15.1.el5PAE)
bind9.4.2
|
rndc status: recursive clients: 666/4900/5000
Bind always uses 100% on one core on single-thread config. After I
recompiled it to multi-thread, it uses nearly 200% on two core :( No
iowait, only sys and user. I searched around but didn't see any info
about how bind use CPU. Why does it become bottleneck?
Upgrade. BIND 9.5 has some pretty big changes to the way the cache is
handled. You may be able to make some adjustments to the 'cache
cleaning interval' in your current configuration, but that won't really
fix the problem I suspect you are seeing.
**NOTE**
the BIND 9.5.x branch is actually pretty old, I'd suggest skipping it
and going right to one of newer Extended Support Versions (9.6 or 9.7).
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