#
# FromDual configuration file template for MySQL
# Location: /etc/my.cnf or /etc/mysql/my.cnf
# This template is intended to work with MySQL 5.5 and newer
#

[client]

port                           = 3306
socket                         = /tmp/mysql.sock
default_character_set          = utf8                                # Possibly this setting is correct for most recent Linux systems


[mysqld_safe]

open_files_limit               = 8192                                # You possibly have to adapt your O/S settings as well
user                           = mysql
log-error                      = error.log


[mysqld]

# Connection and Thread variables

port                           = 3306
socket                         = /tmp/mysql.sock

max_allowed_packet             = 16M
default_storage_engine         = InnoDB                              # Defaults since 5.5

max_connections                = 151                                 # Values < 1000 are typically good
max_user_connections           = 50                                  # Limit one specific user/application
thread_cache_size              = 151                                 # Up to max_connections makes sense


# Query Cache

query_cache_type               = 1                                   # Set to 0 to avoid global QC Mutex 
query_cache_size               = 64M                                 # Avoid too big (> 128M) QC because of QC clean-up lock!


# Session variables

sort_buffer_size               = 2M                                  # Could be too big for many small sorts
tmp_table_size                 = 32M                                 # Make sure your temporary results do NOT contain BLOB/TEXT attributes

read_buffer_size               = 128k                                # Resist to change this parameter if you do not know what you are doing
read_rnd_buffer_size           = 256k                                # Resist to change this parameter if you do not know what you are doing
join_buffer_size               = 128k                                # Resist to change this parameter if you do not know what you are doing


# Other buffers and caches

table_definition_cache         = 400                                 # As big as many tables you have
table_open_cache               = 400                                 # connections x tables/connection (~2)


# MySQL error log

log_error                      = error.log
log_warnings                   = 2


# Slow Qury Log

slow_query_log_file            = slow.log
slow_query_log                 = 0
log_queries_not_using_indexes  = 1
long_query_time                = 0.5
min_examined_row_limit         = 100


# General Query Log

general_log_file               = general.log
general_log                    = 0


# Binary logging and Replication

server_id                      = 42
log_bin                        = mysql-bin
binlog_cache_size              = 1M
binlog_stmt_cache_size         = 1M                                  # Since 5.5
max_binlog_size                = 128M                                # Make bigger for high traffic to reduce number of files
sync_binlog                    = 0                                   # Set to 1 or higher to reduce potential loss of binary-log data
expire_logs_days               = 5                                   # We will survive easter holidays
binlog_format                  = ROW                                 # Use MIXED if you experience some troubles
binlog_row_image               = MINIMAL                             # Since 5.6


# Slave variables

log_slave_updates              = 1                                   # Use if Slave is used for Backup and PiTR
read_only                      = 0                                   # Set to 1 to prevent writes on Slave
skip_slave_start               = 0                                   # To avoid start of Slave threads


# Security variables

# local_infile                   = 0                                   # If you are security aware
# secure_auth                    = 1                                   # If you are security aware
# sql_mode                       = TRADITIONAL,ANSI,ONLY_FULL_GROUP_BY   # Be careful changing this afterwards
# skip_name_resolve              = 0                                   # Set to 1 if you do not trust your DNS or experience problems


# MyISAM variables

key_buffer_size                = 8M                                  # Set to 25 - 33 % of RAM if you still use MyISAM
myisam_recover                 = BACKUP,FORCE


# MEMORY variables

max_heap_table_size            = 64M                                 # Should be greater or equal to tmp_table_size


# InnoDB variables

innodb_buffer_pool_size        = 128M                                # Go up to 80% of your available RAM
innodb_file_per_table          = 1                                   # Is the recommended way nowadays
# innodb_buffer_pool_instances   = <n>                               # Bigger if huge InnoDB Buffer Pool or high concurrency
# innodb_write_io_threads        = 8                                 # If you have a strong I/O system or SSD
# innodb_read_io_threads         = 8                                 # If you have a strong I/O system or SSD
# innodb_io_capacity             = 1000                              # If you have a strong I/O system or SSD


innodb_flush_log_at_trx_commit = 2                                   # 1 for durability, 0 or 2 for performance
innodb_log_buffer_size         = 8M                                  # Bigger if innodb_flush_log_at_trx_commit                                    = 0
innodb_log_file_size           = 256M                                # Bigger means more write throughput but longer recovery time

# Galera specific MySQL parameter

# default_storage_engine         = InnoDB                            # Galera only works with InnoDB
# innodb_flush_log_at_trx_commit = 0                                 # Durability is achieved by committing to the Group
# innodb_autoinc_lock_mode       = 2
# innodb_locks_unsafe_for_binlog = 1
# binlog_format                  = row                               # Galera only works with RBR
# query_cache_type               = 0                                 # Use QC with Galera only in a Master/Slave set-up
# query_cache_size               = 0


# WSREP parameter

# wsrep_provider                 = none                                # Start mysqld without Galera
# wsrep_provider                 = /usr/lib/galera/libgalera_smm.so    # Location of Galera Plugin

# wsrep_cluster_name             = "My cool Galera Cluster"            # Same Cluster name for all nodes
# wsrep_cluster_address          = "gcomm://"                          # Initial Cluster start
# wsrep_cluster_address          = "gcomm://192.168.0.2,192.168.0.3"   # Start other nodes like this

# wsrep_node_name                = "Node A"                            # Unique node name
# wsrep_node_address             = 192.168.0.1                         # Our address where replication is done
# wsrep_node_incoming_address    = 10.0.0.1                            # Our external interface where application comes from
# wsrep_causal_reads             = 0                                   # If you need real synchronous replication set to 1

# wsrep_sst_method               = mysqldump                           # SST method (initial full sync): mysqldump, rsync, rsync_wan, xtrabackup
# wsrep_sst_auth                 = sst:sst                             # Username/password for sst user
# wsrep_sst_receive_address      = 192.168.0.1                         # Our address where to receive SST


[mysql]

no_auto_rehash
max_allowed_packet             = 16M
prompt                         = '\u@\h [\d]> '


[mysqldump]

max_allowed_packet             = 16M