Tweak MySQL for better performance

my.cnf

# CPU = 4
# RAM = 8GB
# Website = WordPress, WooCommerce, >1k products
# Cache = W3 Total Cache

[mysql]
port = 3306

[mysqld]
performance_schema = ON
skip-name-resolve = 1
bind-address = 0.0.0.0

general_log_file = /var/log/mysql/mysql.log
general_log = 0

# Default MySQL character set and collation
# See: https://coderwall.com/p/xdrjxg/proper-mysql-character-set-and-collation-setup
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
skip-character-set-client-handshake

max_connections		= 200
max_connect_errors      = 10
connect_timeout		= 5
max_allowed_packet	= 16M
thread_cache_size       = 128
tmp_table_size		= 128M
max_heap_table_size	= 128M
table_open_cache        = 2048
table_definition_cache  = 2048
key_buffer_size         = 128M
join_buffer_size        = 512K

# Query Cache
query_cache_limit	= 128K
query_cache_size	= 0
query_cache_type	= 0

# Log
slow_query_log = 0
slow_query_log_file	= /var/log/mysql/mariadb-slow.log
long_query_time = 3
log_slow_rate_limit	= 100
log_slow_verbosity	= query_plan

# InnoDB
default_storage_engine	= InnoDB
innodb_log_file_size    = 1024M
innodb_buffer_pool_size	= 4G
innodb_log_buffer_size	= 64M

[mysqldump]
quick
max_allowed_packet	= 16M

[isamchk]
key_buffer		= 16M