Hundreds of connections make mongodb query slowly about ferretdb

[Spoomer]

Did you check the postgres documentation about max_connections?

[peintune]

Did you check the postgres documentation about max_connections?

Hi, thanks for your reply.

Yes ,I have set the postgres max_connections to 10000, and I checked the remain connections in postgres, 9973 connections free. I login to postgresql and query something , it executed quickly. meanwhile, I login use mongsh through ferretdb , query something, it run slowly. That means, postgres is running well, the ferretdb has performance issue.

ferretdb=# select max_conn-now_conn as resi_conn from (select setting::int8 as max_conn,(select count(*) from pg_stat_activity) as now_conn from pg_settings where name = 'max_connections') t;
resi_conn

  9973

(1 row)

Is there any way tuning the ferrendb parameters to make ferrentdb have a good performance? Or, is there any way to deploy multi-ferretdb architecture ？

[AlekSi]

Please try running FerretDB with debug logs. There should be messages about connection establishment, etc. It is hard to understand what is going on without logs.

[peintune]

@AlekSi

Ok, here is the debug logs, and I found the cpu usage is very high of ferretdb, I am running ferretdb by docker, and the docker is running on a 8 core cpus server.

log27017-3.log

[AlekSi]

Please download http://127.0.0.1:8088/debug/pprof/profile?seconds=30 (address is configured by --debug-addr / FERRETDB_DEBUG_ADDR) and attach the file