Hi all,
I am doing performance test for my company's resolver with BIND 9.10.3 and
find something weird. The test client and resolver are in the same LAN. When
I use a small set of domain as an input with a 10000 per second query
sending rate, everything looks reasonable. However, when I use a set of
thousands of domains as an input, The QPS is unexpectedly low and the
latency is high. Here is the result from DNSperf:
Statistics:
Queries sent: 11823
Queries completed: 11823 (100.00%)
Queries lost: 0 (0.00%)
Response codes: NOERROR 9883 (83.59%), SERVFAIL 242 (2.05%),
NXDOMAIN 1698 (14.36%)
Average packet size: request 48, response 203
Run time (s): 69.891567
Queries per second: 169.162039
Average Latency (s): 0.519502 (min 0.003766, max 211.981919)
Latency StdDev (s): 1.423057
And when I decreased the query sending rate to 100 per second, the latency
decrease as the same when I use small set of domain as an input. Here is the
result from DNSperf:
Statistics:
Queries sent: 6000
Queries completed: 6000 (100.00%)
Queries lost: 0 (0.00%)
Response codes: NOERROR 4995 (83.25%), SERVFAIL 37 (0.62%), NXDOMAIN
968 (16.13%)
Average packet size: request 54, response 211
Run time (s): 62.789257
Queries per second: 95.557748
Average Latency (s): 0.083028 (min 0.005266, max 134.543920)
Latency StdDev (s): 0.568863
Anyone knows any explanation for this? Thanks.
---------------
Runxia Wan(Brian)
Research Engineer
BII Lab
Beijing Internet Institute(BII)
rx...@biigroup.cn
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