standard mycnf 8-12 GB

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#DATE: 2011-02-02
#SITE: http://datastrangler.com
#DESCRIPTION: MySQL config 5.0.x, 5.1.x, 5.5.x
#RAM: 12GB RAM dedicated server
#Connections: 1000 connections
################################################################################
[mysqld_safe]
nice = -15
log-error =/var/log/mysqld.log
pid-file =/var/run/mysqld/mysqld.pid

[client]
socket = /var/lib/mysql/mysql.sock
default-character-set = utf8

[mysqld]
## Charset and Collation
#innodb_force_recovery=1
character-set-server = utf8
collation-server = utf8_general_ci
lower_case_table_names = 1
## Files
wait_timeout = 57600
lower_case_table_names = 1
back_log = 300
open-files-limit = 8192
open-files = 1024
port = 3306
socket = /var/lib/mysql/mysql.sock
skip-external-locking
#skip-name-resolve

## Logging
datadir = /var/lib/mysql
relay_log = mysql-relay-bin
relay_log_index = mysql-relay-index
#log = mysql-gen.log
log_error = mysql-error.err
log_warnings
#log_bin = mysql-bin
#log_slow_queries = mysql-slow.log
#log_queries_not_using_indexes
long_query_time = 10 #default: 10
max_binlog_size = 256M #max size for binlog before rolling
expire_logs_days = 4 #binlog files older than this will be purged

## Per-Thread Buffers * (max_connections) = total per-thread mem usage
thread_stack = 256K #default: 32bit: 192K, 64bit: 256K
sort_buffer_size = 1M #default: 2M, larger may cause perf issues
read_buffer_size = 1M #default: 128K, change in increments of 4K
read_rnd_buffer_size = 1M #default: 256K
join_buffer_size = 1M #default: 128K
binlog_cache_size = 64K #default: 32K, size of buffer to hold TX queries
## total per-thread buffer memory usage: 8832000K = 8.625GB

## Query Cache
query_cache_size = 8M #global buffer
query_cache_limit = 512K #max query result size to put in cache

## Connections
max_connections = 500 #multiplier for memory usage via per-thread buffers
max_connect_errors = 100 #default: 10
concurrent_insert = 2 #default: 1, 2: enable insert for all instances
connect_timeout = 30 #default -5.1.22: 5, +5.1.22: 10
max_allowed_packet = 8M #max size of incoming data to allow

## Default Table Settings
sql_mode = NO_AUTO_CREATE_USER

## Table and TMP settings
max_heap_table_size = 512M #recommend same size as tmp_table_size
bulk_insert_buffer_size = 512M #recommend same size as tmp_table_size
tmp_table_size = 512M #recommend 1G min
#tmpdir = /data/mysql-tmp0:/data/mysql-tmp1 #Recommend using RAMDISK for tmpdir

## Table cache settings
#table_cache = 512 #5.0.x
#table_open_cache = 512 #5.1.x, 5.5.x

## Thread settings
thread_concurrency = 16 #recommend 2x CPU cores
thread_cache_size = 100 #recommend 5% of max_connections

## Replication
#read_only
#skip-slave-start
#slave-skip-errors =
#slave-net-timeout =
#slave-load-tmpdir =
#slave_transaction_retries =
#server-id =
#replicate-same-server-id =
#auto-increment-increment =
#auto-increment-offset =
#master-connect-retry =
#log-slave-updates =
#report-host =
#report-user =
#report-password =
#report-port =
#replicate-do-db =
#replicate-ignore-db =
#replicate-do-table =
#relicate-ignore-table =
#replicate-rewrite-db =
#replicate-wild-do-table =
#replicate-wild-ignore-table =

## Replication Semi-Synchronous 5.5.x only, requires dynamic plugin loading ability
#rpl_semi_sync_master_enabled = 1 #enable = 1, disable = 0
#rpl_semi_sync_master_timeout = 1000 #in milliseconds , master only setting

## 5.1.x and 5.5.x replication related setting.
#binlog_format = MIXED

## MyISAM Engine
key_buffer = 1M #global buffer
myisam_sort_buffer_size = 128M #index buffer size for creating/altering indexes
myisam_max_sort_file_size = 256M #max file size for tmp table when creating/alering indexes
myisam_repair_threads = 4 #thread quantity when running repairs
myisam_recover = BACKUP #repair mode, recommend BACKUP

## InnoDB Plugin Dependent Settings
#ignore-builtin-innodb
#plugin-load=innodb=ha_innodb_plugin.so;innodb_trx=ha_innodb_plugin.so;innodb_locks=ha_innodb_plugin.so;innodb_cmp=ha_innodb_plugin.so;innodb_cmp_reset=ha_innodb_plugin.so;innodb_cmpmem=ha_innodb_plugin.so;innodb_cmpmem_reset=ha_innodb_plugin.so;innodb_lock_waits=ha_innodb_plugin.so

## InnoDB IO Capacity - 5.1.x plugin, 5.5.x
#innodb_io_capacity = 200

## InnoDB IO settings - 5.1.x only
#innodb_file_io_threads = 16

## InnoDB IO settings - 5.5.x and greater
#innodb_write_io_threads = 16
#innodb_read_io_threads = 16

## InnoDB Plugin Independent Settings
innodb_data_home_dir = /var/lib/mysql
innodb_data_file_path = ibdata1:1G;ibdata2:1G;ibdata3:2G:autoextend
innodb_log_file_size = 256M #64G_RAM+ = 768, 24G_RAM+ = 512, 8G_RAM+ = 256, 2G_RAM+ = 128
innodb_log_files_in_group = 4 #combined size of all logs <4GB. <2G_RAM = 2, >2G_RAM = 4
innodb_buffer_pool_size = 2560M #global buffer
innodb_additional_mem_pool_size = 1M #global buffer
innodb_status_file #extra reporting
innodb_file_per_table #enable always
innodb_flush_log_at_trx_commit = 2 #2/0 = perf, 1 = ACID
innodb_table_locks = 0 #preserve table locks
innodb_log_buffer_size = 32M #global buffer
innodb_lock_wait_timeout = 60
innodb_thread_concurrency = 16 #recommend 2x core quantity
innodb_commit_concurrency = 16 #recommend 4x num disks
#innodb_flush_method = O_DIRECT #O_DIRECT = local/DAS, O_DSYNC = SAN/iSCSI
innodb_support_xa = 0 #recommend 0, disable xa to negate extra disk flush
skip-innodb-doublewrite

## Binlog sync settings
## XA transactions = 1, otherwise set to 0 for best performance
sync_binlog = 0

## TX Isolation
transaction-isolation = REPEATABLE-READ #REPEATABLE-READ req for ACID, SERIALIZABLE req XA

## Per-Thread Buffer memory utilization equation:
#(read_buffer_size + read_rnd_buffer_size + sort_buffer_size + thread_stack + join_buffer_size + binlog_cache_size) * max_connections

## Global Buffer memory utilization equation:
# innodb_buffer_pool_size + innodb_additional_mem_pool_size + innodb_log_buffer_size + key_buffer_size + query_cache_size

[mysqldump]
quick
quote-names
max_allowed_packet = 64M