How can I set the max number of MySQL processes or threads?

Question

ps axuw| grep mysql indicates only MySQL process, but if I run htop I can see 10 rows each one of them with a separate PID. So I wonder if they are threads or proce

Answer 1

There is few configuration settings in /etc/mysql/my.cnf that would impact memory usage. Following settings: key_buffer = 8M max_connections = 30 query_cache_size = 8M query_cache_limit = 512K thread_stack = 128K should drastically reduce the memory usage of mysql.

read more here: http://opensourcehacker.com/2011/03/31/reducing-mysql-memory-usage-on-ubuntu-debian-linux/