Maintained by: NLnet Labs

[Unbound-users] Performance tuning tips?

Robert Edmonds
Thu Feb 7 21:51:27 CET 2013

Jaco Lesch wrote:
> This improved performance significantly with a jump from 3600 qps to
> 6200 qps and the system was not sluggish with this "workload" at
> all. The magic seems to have been the combination of
> "outgoing-range" and "num-queries-per-thread", the system load did
> drop from 28 to around 21 directly after this change.

can you clarify, is the workload a "production" resolver (so, a real
user base that is perhaps really only offering ~6k qps of load), or is
this a "benchmark" where the goal is to determine the maximum number of
qps that the server can handle?

either way, a load average of 21-28 sounds way too high.  perhaps
solaris has some sort of tool (dtrace?) comparable to the linux "perf"
tool that would help pinpoint the cause of the poor performance?

Robert Edmonds
edmonds at