512M内存 MYSQL的my.cnf

每次重装系统，总是被MYSQL搞个半死，这次要存下来，不见得准确，但可以使用，版本5.5.4：

# Example MySQL config file for medium systems.## This is for a system with little memory (32M - 64M) where MySQL plays# an important part, or systems up to 128M where MySQL is used together with# other programs (such as a web server)## MySQL programs look for option files in a set of# locations which depend on the deployment platform.# You can copy this option file to one of those# locations. For information about these locations, see:# http://dev.mysql.com/doc/mysql/en/option-files.html## In this file, you can use all long options that a program supports.# If you want to know which options a program supports, run the program# with the "--help" option.# The following options will be passed to all MySQL clients[client]#character-set-server=utf8#password= your_password#host            = localhostport= 3306socket= /tmp/mysql.sock# Here follows entries for some specific programs# The MySQL server[mysqld]sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES#character-set-server=utf8tmpdir= /tmpport= 3306socket= /tmp/mysql.sockskip-external-lockinglog-error=/alidata/log/mysql/error.logkey_buffer_size = 16Mmax_allowed_packet = 1Mtable_open_cache = 64sort_buffer_size = 512Knet_buffer_length = 8Kread_buffer_size = 256Kread_rnd_buffer_size = 512Kmyisam_sort_buffer_size = 8M# Don't listen on a TCP/IP port at all. This can be a security enhancement,# if all processes that need to connect to mysqld run on the same host.# All interaction with mysqld must be made via Unix sockets or named pipes.# Note that using this option without enabling named pipes on Windows# (via the "enable-named-pipe" option) will render mysqld useless!# #skip-networking# Replication Master Server (default)# binary logging is required for replicationlog-bin=mysql-bin# binary logging format - mixed recommendedbinlog_format=mixed# required unique id between 1 and 2^32 - 1# defaults to 1 if master-host is not set# but will not function as a master if omittedserver-id= 1innodb_use_sys_malloc = 1innodb_change_buffering = allinnodb_file_format_check = 1innodb_max_dirty_pages_pct = 75innodb_data_home_dir = /alidata/server/mysql/data/innodb_data_file_path =  ibdata1:1024M;ibdata2:512M:autoextendinnodb_log_group_home_dir = /alidata/server/mysql/datainnodb_log_buffer_size = 16Minnodb_log_file_size = 64Minnodb_log_files_in_group = 2innodb_additional_mem_pool_size = 8Minnodb_flush_log_at_trx_commit = 1#innodb_lock_wait_timeout = 50innodb_buffer_pool_size = 16M[mysqldump]quickmax_allowed_packet = 32M[mysql]no-auto-rehash# Remove the next comment character if you are not familiar with SQL#safe-updates[myisamchk]key_buffer_size = 20Msort_buffer_size = 20Mread_buffer = 2Mwrite_buffer = 2M[mysqlhotcopy]interactive-timeoutexpire_logs_days = 5max_binlog_size = 1000M

然后，因为内存太小，加点SWAP:

$ sudo dd if=/dev/zero of=/swapfile bs=1M count=1024 #增加1G的SWAP进去$ sudo mkswap /swapfile$ sudo swapon /swapfile$ free

添加这行： /swapfile swap swap defaults 0 0 到 /etc/fstab