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The /etc/mysql/mysql.conf.d/mysqld.cnf file

[mysqld_safe]

socket = /var/run/mysqld/mysqld.sock

nice = 0

[mysqld]

#

# * Basic Settings

#

user = mysql

pid-file = /var/run/mysqld/mysqld.pid

socket = /var/run/mysqld/mysqld.sock

port = 3306

basedir = /usr

datadir = /var/lib/mysql

tmpdir = /tmp

lc-messages-dir = /usr/share/mysql

skip-external-locking

#

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

bind-address = 127.0.0.1

#

# * Fine Tuning

#

key_buffer_size = 16M

max_allowed_packet = 16M

thread_stack = 192K

thread_cache_size = 8

# This replaces the startup script and checks MyISAM tables if needed

# This replaces the startup script and checks MyISAM tables if needed

# the first time they are touched

myisam-recover-options = BACKUP

#max_connections = 100

#table_open_cache = 64

#thread_concurrency = 10

#

# * Query Cache Configuration

#

query_cache_limit = 1M

query_cache_size = 16M

#

# * Logging and Replication

#

# Both location gets rotated by the cronjob.

# Be aware that this log type is a performance killer.

# As of 5.1 you can enable the log at runtime!

#general_log_file = /var/log/mysql/mysql.log

#general_log = 1

#

# Error log - should be very few entries.

#

log_error = /var/log/mysql/error.log

#

# Here you can see queries with especially long duration

#slow_query_log = 1

#slow_query_log_file = /var/log/mysql/mysql-slow.log

#long_query_time = 2

#log-queries-not-using-indexes

#

# The following can be used as easy to replay backup logs or for replication.

Location Config

Slow Query log config

Concurrent query config