mysql_async v0.36.1
I have very old MySql 5.1.53 and thank god this library work with it (because is sqlx not).
It has tons of problecms actually - not working timeouts, reset, but its okay.
The problem I debug today is memory growing .
Problem gone when I fully destroy Pool and create it from scratch.
Valgrind masiff said it is compression buffer.
I dont know if it even worth investigation, but may be my report could help.