diff --git a/doc/example_datasets/nyc_taxi.md b/doc/example_datasets/nyc_taxi.md index 7cf313e5055..64de5789736 100644 --- a/doc/example_datasets/nyc_taxi.md +++ b/doc/example_datasets/nyc_taxi.md @@ -272,7 +272,8 @@ WHERE (table = 'trips_mergetree') AND active BTW, you could run OPTIMIZE for MergeTree table. But this is not necessary, everything will be fine. -Results on single server: +Results on single server +======================== Q1: ``` @@ -348,3 +349,16 @@ Q1: 0.028 sec. Q2: 0.043 sec. Q3: 0.051 sec. Q4: 0.072 sec. + +In that case, query execution speed is dominated by latency. +We do queries from client located in Yandex datacenter in Mäntsälä (Finland) to cluster somewhere in Russia, that adds at least 20 ms of latency. + +Summary +======= + +``` +nodes Q1 Q2 Q3 Q4 + 1 0.490 1.224 2.104 3.593 + 3 0.212 0.438 0.733 1.241 +140 0.028 0.043 0.051 0.072 +```