How to set malloc-lib in mysql 5.7 in ubuntu 18.04 LTS

Question

I recently install jemmaloc 3.6.0-11 using apt-get install libjemalloc1

on my ubuntu server 18.04

the installation is succesfull

but when I check using

pt-mysql-summary | grep -A5 -i "memory management"

I get

    Memory management library 
jemalloc is not enabled in mysql config for process with id 89539 The End 

How I can do this ?

I am using Mysql 5.7.26

Answer 1

found it

it turned out I need to add a line Environment=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1

in /lib/systemd/system/mysql.service

what a headache hahaha