How to allocate more RAM to MariaDB/MySQL on a shared server and increase the connection count
Background If you have a server with sufficient RAM but you are running out of MySQL connections, you might want to look at two easy
ram
How to check the available memory (RAM) on a Linux computer and other useful memory diagnostic tools
Memory Diagnostic Tools for Ubuntu Linux Here is a curated list of memory diagnostic tools for Linux. free To check the Random Access Memory (RAM)