如何衡量我的代码性能和数据库性能php

I am using laravel 5 i have a big server which have high cost but after developing script my server have tons of load on database i have already contact to my server host he say the script is the issue may be code is poor. i don't know why it's happening need help how i can measure my code with database performance.I am using laravel 5 i have a big server which