How to reduce MySQL Server CPU usage or load?

Question

How to reduce MySQL Server CPU usage or load ?

Here is my.cnf :

skip-name-resolve disable_log_bin innodb_buffer_pool_size=200GB innodb_log_file_size=25GB innodb_log_buffer_size=8M innodb_buffer_pool_instances=64 innodb_flush_method=O_DIRECT innodb_flush_log_at_trx_commit=1 innodb_lock_wait_timeout=120 innodb_file_per_table=1 innodb_io_capacity=5000 innodb_write_io_threads=32 innodb_read_io_threads=32 innodb_thread_concurrency=512 innodb_autoinc_lock_mode=0 slow_query_log=1 slow_query_log_file="/var/lib/mysql/mysql-slow.log" long_query_time=1 transaction-isolation=READ-COMMITTED bulk_insert_buffer_size=256M max_allowed_packet=64M max_heap_table_size=256M ft_min_word_len=2 ft_stopword_file=/var/lib/mysql/stopwords max_connections=1024 max_user_connections=1024 max_connect_errors=999999999 tmp_table_size=128M table_open_cache=5000 wait_timeout=10800 thread_cache_size=400 group_concat_max_len=4194304 join_buffer_size=32M key_buffer_size=2GB read_buffer_size=8M sort_buffer_size=8M read_rnd_buffer_size=16M myisam_sort_buffer_size=600M delayed_insert_limit=100 delayed_insert_timeout=300 delayed_queue_size=1000000 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid 

Answer 1

Rate Per Second = RPS

Suggestions to consider to reduce cpu usage or load in [mysql] section of my.cnf

read_rnd_buffer_size=32K # from 16M to reduce handler_read_rnd_next RPS read_buffer_size=1M # from 8M to reduce handler_read_next RPS innodb_thread_concurrency=0 # from 512 to allow OS to manage the limit max_connect_errors=10 # from 999999999 to aggravate hackers/crackers after 10 break in attempts 

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