Может кому пригодится, выкладываю свой базовый конфиг под сервер (шаред хостинг) с 4-8гб озу.
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# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[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
language = /usr/share/mysql/english
skip—external—locking
skip—name—resolve
low—priority—updates
bind—address = 127.0.0.1
#Tuning
key_buffer = 1200M
thread_stack = 512K
thread_cache_size = 32
table_cache = 60000
thread_concurrency = 12
net_buffer_length = 32
myisam—recover = BACKUP
query_cache_limit = 2M
query_cache_size = 256M
myisam_sort_buffer_size = 256M
tmp_table_size = 256M
max_heap_table_size = 128M
read_buffer_size = 2M
read_rnd_buffer_size = 4M
sort_buffer_size = 2M
join_buffer_size = 4M
max_allowed_packet = 256M
max_sort_length = 512
max_connections = 120
max_connect_errors = 50
max_user_connections = 25
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
log_slow_queries = /var/log/mysql/mysql—slow.log
long_query_time = 1
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 300M
innodb_buffer_pool_size = 64M
innodb_additional_mem_pool_size = 32M
innodb_file_io_threads = 8
innodb_lock_wait_timeout = 50
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 2
innodb_flush_method = O_DIRECT
transaction—isolation = READ—COMMITTED
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
[mysqldump]
quick
quote—names
max_allowed_packet = 256M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 32M
!includedir /etc/mysql/conf.d/
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Основные моменты key_buffer max_connections делайте под свою систему, key_buffer не ставьте больше чем 1/3 озу и не больше объема всех б.д.
Для тех кто в танке конфиг в debian лежит в /etc/mysql/my.cnf
перезапустить службу services mysql restart
если вы хотите что бы mysql слушал на внешних адресах то закомментируйте
bind-address = 127.0.0.1