• network_mode: host for disable docker-proxy
• limit for each container set to 2 CPUs
• can only be run on Linux, MacOS does not support network_mode: host

docker compose up
# show pg connection per application
docker compose exec postgres psql -U user -d db1 -c "SELECT application_name, count(*) FROM pg_stat_activity group by 1;"
# CPU, MEM utilization
docker compose stats

Benchmarked by Oha

Benchmark Program Languages

This benchmark simulates a real-world web example: executing 3 queries in PostgreSQL, with each query time 2 mc.

oha -n 20000 -c 50 -m GET "http://localhost:3000?count=3&delay=0.002" # ruby puma
oha -n 20000 -c 50 -m GET "http://localhost:3001?count=3&delay=0.002" # ruby falcon
oha -n 20000 -c 50 -m GET "http://localhost:3002?count=3&delay=0.002" # ruby iodine fiber
oha -n 20000 -c 50 -m GET "http://localhost:4000?count=3&delay=0.002" # crystal
oha -n 20000 -c 50 -m GET "http://localhost:4001?count=3&delay=0.002" # go
oha -n 20000 -c 50 -m GET "http://localhost:4002?count=3&delay=0.002" # nodejs
oha -n 20000 -c 50 -m GET "http://localhost:4003?count=3&delay=0.002" # async python

	ruby puma	ruby falcon	ruby iodine	crystal	go	nodejs	python
Requests/sec:	3179	4943	3543	7549	5996	5510	2731
Percentile 50% mc	10	10	7	6	8	9	18
Percentile 90% mc	27	12	28	7	9	10	20
Percentile 99% mc	68	14	45	7	9	13	23
CPU utilization %	218	186	206	70	165	199	206
Memory (MiB)	74	71	227	14	14	99	60

Puma vs Falcon vs Iodine, different numbers of connections to run concurrently

oha -n 20000 -c 50 -m GET "http://localhost:3000?count=3&delay=0.002" # ruby puma
oha -n 20000 -c 50 -m GET "http://localhost:3001?count=3&delay=0.002" # ruby falcon
oha -n 20000 -c 50 -m GET "http://localhost:3002?count=3&delay=0.002" # ruby iodine

Requests/sec

connections	ruby puma	ruby falcon	ruby iodine
-c 50	3179	4943	3543
-c 200	3083	4066	561
-c 500	2970	2909	244

Percentile 90%, mc

connections	ruby puma	ruby falcon	ruby iodine
-c 50	10	10	7
-c 200	27	55	257
-c 500	29	193	5097

Iodine with 200 and 500 connections have many error with db poll - ERROR: Iodine caught an unprotected exception - ConnectionPool::TimeoutError: Waited 5 sec, 0/20 available

Ruby vs Nodejs vs Python, switch context workers on 2 cpu, pg pool size - 20 per worker

workers	ruby puma	ruby falcon	nodejs	python
2	3179	4943	5510	2731
3	3133	5251	5442	2114
4	3396	4789	4784	1962
7	4851	4376	4056	1827
15	5088	4373	2242	1579