Increased CPU load due to increased MySQL consumption

Hello My server CPU load suddenly increases. The result of htop shows that MySQL consumes a lot of CPU. Please advise what should I do? The result is as follows PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 20461 mysql 21 1 15.2G 12.9G 11440 S 149. 20.6 535h /usr/sbin/mysqld --daemonize --pid21091 mysql CPU% = 149 thanks