MySQL

[mysqld]
# Bind only to expected address. You can not bind to multiple addresses, it's
# none, 1 or all (0.0.0.0)
bind-address = 127.0.0.1

# Always use UTF-8
character-set-server = utf8

# Root path used to store MySQL's data
datadir = /var/lib/mysql

# Use innodb by default (true anyways but I like to be explicit)
default-storage-engine = innodb

# 0 = Don't log warnings, 1 = log warnings, 2 = log warnings and access denied
# errors.
log-warnings = 2

# How many real world seconds pass before we consider a query to be long
# running. Default is 10.
long_query_time = 5

# Which port to listen on, default is 3306
port = 3306

# A user needs to have the INSERT privilege on the mysql.user table to use the
# GRANT statement. This can be provided to non-root users with the following
# command:
# GRANT INSERT(user) ON mysql.user TO 'user_name'@'host_name';
safe_user_create

# Prevent client connections from clients attempting to use insecure password
# authentication
secure_auth

# Only allow load data and outfile to be to/from the given directory. This
# ensures that whatever user is trying to load or dump data from this server
# instance already needs to be able to write to that directory. If an
# unauthorized person can write to the mysql data directory anyways the data
# can't be trusted anyway.
secure-file-priv = /var/lib/mysql

# Require privileges to actually list/enumerate the databases
skip-show-database

# Prevent symbolic links as a security measureskip-symbolic-links
# Log any "slow" queries from hosts, useful as a diagnostic measure for both
# application development and production diagnostics. A slow query is defined by
# the long_query_time variable.
#
# These logs will live in /var/lib/mysql/ and will be pre-pended with the
# hostname that caused the slow query itself.
slow_query_log

# Path to the socket file used to access the server locally
socket = /var/lib/mysql/mysql.sock

##### SSL Settings #####

# All three options are required to enable SSL for the server. To force a user
# to use an SSL connection when they are connecting to the server, while granting
# them privileges add "REQUIRE SSL" to the end of the grant statement. "REQUIRE
# X509" will require the user to present a valid certificate (it's unclear whether
# this needs to be signed by a certificate in the server's CA file), "REQUIRE
# ISSUER" and "REQUIRE SUBJECT" specify details required in the provided
# certificate. The last three imply "REQUIRE SSL".

# Define the certificate authority file, it should have been used to sign the
# server's certificate, and will be used to validate client certificates that
# have been presented.
#ssl_ca = ca.crt

# The name of the SSL certficate file in PEM format to use for establishing a
# secure connection.
#ssl_cert = mysql.crt

# The name of the SSL key file in PEM format to use for establishing a secure
# connection
#ssl_key = mysql.key

##### InnoDB specific settings #####

# If there are lots of tables in the database you may need to increase this
# value from it's default of 8Mb. MySQLd will log warning messages if this is
# the case.
innodb_additional_mem_pool_size = 8M

# Amount of data to cache, default is 8Mb, shouldn't ever be more than 80% of
# server's physical memory size even on a dedicated box. Even that high may
# cause other issues on the server such as competition from the OS, and the
# space must be contiguous which isn't always available. This is only the table
# and data cache, MySQLd may allocate additional memory for buffers and control
# structures. On dedicated MySQL boxes it is recommended that this be between
# 75% and 80%
innodb_buffer_pool_size = 32M

# Validate the checksums of all pages read from disk to ensure fault tolerance
# against broken hardware or data files. Enabled by default but I like to be
# explicit...
innodb_checksums = 1

# Breaks the database into smaller more managable pieces, and if careful can
# allow for individual table backups and restoration while the server is
# running. There is a special process to handle this and it should looked up
# before attempting. The main benefit of using this option is the prevention
# of main tablespace growth.
innodb_file_per_table

# 0 = A most one second of transactions are lost in the event of an application
# crash, 1 = ACID compliant and most reliable storage of data, 2 is somewhere in
# between 0 and 1 losing at most 1 second of data only in the case of power
# outage or server failure. 1 is the default. If you're not worried about losing
# transactions for the last second or two a value of 2 can have a dramatic increase
# especially when there are a lot of short write transactions.
innodb_flush_log_at_trx_commit = 2

# An upper limit on the IO activity performed by InnoDB background tasks.
# Default value is 200 with a minimum value of 100. This parameter should be set
# approximately what the IOPS of the system disk the tables are stored on is
# able to provide (100 for 5.2k & 7.2k drives, 150 for 10k, 200 for 15k and
# 250 for SSDs). It is recommended to 'keep this setting as low as practical, but
# not so low that these background activities fall behind.' Too high and data will
# be removed from the buffer pool too quickly to benefit from the caching.
innodb_io_capacity = 100

# This will prevent too much log switching on write heavy databases (default is
# 8Mb). Larger buffers all larger transactions to run without the need to write
# the log to disk before the transactions commit. On larger databases this should
# be set higher to something like 256Mb, there isn't a large benefit above 512Mb
innodb_log_file_size = 64M

# The size of the buffer that InnoDB uses to write to the log files on disk.
# Default is 8Mb. A larger log buffer allows larger transactions to run without
# a need to write the log to disk before the transactions commit.
innodb_log_buffer_size = 8M

# The size of each transaction log (default is 5Mb). The larger the value the
# less checkpoint flush activity is needed in the buffer pool saving disk IO at
# the expense of crash recovery time. Recommended is 1/nth of the
# innodb_buffer_pool_size where N is the value of innodb_log_files_in_group. In
# this file that's 1/2 of 32Mb.
innodb_log_file_size = 16M

# The number of transaction logs to make use of, the default, recommended and
# minimum is 2. These will written to in a circular fashion.
innodb_log_files_in_group = 2

[mysqld_safe]

# Where to store the MySQLd process ID
pid-file = /var/run/mysqld/mysqld.pid

# Enable logging to syslog
syslog

[mysql]

# Adjust the prompt to be more useful/verbose.
prompt=(\\u@\\h) [\\d]>\\_