mysql配置优化
11 年 ago jony mysql配置优化已关闭评论
[mysqld]
skip-name-resolve
server-id = 1
bind-address = 0.0.0.0
port = 3306
datadir = /home/mysql
tmpdir = /tmp
default_storage_engine = InnoDB
character_set_server = utf8
innodb_file_per_table = 1
innodb_log_file_size = 512M
innodb_log_files_in_group = 4
innodb_rollback_on_timeout = 1
slow_query_log = 1
slow_query_log_file =/var/log/mysql/mysql-slow.log
long_query_time = 1
#log-queries-not-using-indexes#这个参数不安全，说是记录没有用到索引的语句，其实记录的全部的日志，占用大量的IO，建议不要打开
#relay_log_recovery=1#这个参数在丛库上一定要加上
query_cache_type = off
query_cache_size = 0
#这两项是禁用缓存，这个使服务器用途而定：写比较多的数据库最好禁用，因为没写一次他要修改缓存中的数据，给数据库带来额外的开销，读比较的可以开启，可以提高查询效率
#一下4个参数是mysql5.6上的新特性
innodb_buffer_pool_dump_at_shutdown = 1 #解释：在关闭时把热数据dump到本地磁盘。
innodb_buffer_pool_dump_now = 1 #解释：采用手工方式把热数据dump到本地磁盘。
innodb_buffer_pool_load_at_startup = 1 #解释：在启动时把热数据加载到内存。
innodb_buffer_pool_load_now = 1 #解释：采用手工方式把热数据加载到内存。
read_buffer_size = 2M
sort_buffer_size = 2M
join_buffer_size = 1M
key_buffer_size = 2G
thread_cache_size = 2048
open_files_limit=65535
innodb_open_files = 8192
max_allowed_packet = 64M
thread_stack = 512k
max_length_for_sort_data = 16k
tmp_table_size = 256M
max_heap_table_size = 256M
max_connections = 4000
max_connect_errors = 30000
innodb_read_io_threads = 8
innodb_write_io_threads = 16
innodb_flush_method = O_DIRECT
innodb_io_capacity = 20000#根据硬盘的情况修改，stat的用100，sas的200，sas做riad10的为400fision-io的可以设置为20000
innodb_buffer_pool_size = 72G#内存的80%
innodb_buffer_pool_instances=18
thread_concurrency=0
innodb_thread_concurrency = 0
innodb_log_buffer_size = 16M
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 60
innodb_old_blocks_time=1000
innodb_use_native_aio = 1
innodb_purge_threads=1
innodb_change_buffering=inserts
