mysql参数建议

Tehran

2021 年 11 月 01 日

433 次浏览

暂无评论

5827字数

Mysql

一.高配置优化说明

以下配置适合16核64G及以上的配置，会让性能稍微提高1/3左右。

二.配置

my.cnf
[client]
port = 3306
socket = /usr/local/mysql/mysql.sock
[mysqld]

基础设置

port = 3306
bind-address = 0.0.0.0
lower_case_table_names=1
character-set-server=utf8mb4
default-storage-engine=innoDB
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/usr/local/mysql/mysql.sock
log-error=/var/log/mysql/mysql.log
pid-file=/usr/local/mysql/mysql.pid

扩展设置

max_connections = 5000
max_connect_errors = 6000
connect_timeout=10
wait_timeout = 300
interactive_timeout = 300
back_log = 300
open_files_limit = 65535
table_open_cache = 16000
max_allowed_packet = 500M
max_heap_table_size = 64M
tmp_table_size = 256M
read_buffer_size = 8M
read_rnd_buffer_size = 8M
sort_buffer_size = 8M
join_buffer_size = 8M
key_buffer_size = 256M
thread_cache_size = 64
thread_stack = 512K
ft_min_word_len = 1
skip-external-locking
bulk_insert_buffer_size = 8M
myisam_sort_buffer_size = 32M
net_retry_count = 100
auto_increment_increment=0
auto_increment_offset=0
explicit_defaults_for_timestamp=false
log_bin_trust_function_creators=1
performance_schema= 0
transaction-isolation = REPEATABLE-READ
query_cache_size = 0
query_cache_type = 0

binlog日志

log-bin=mysql-bin
log-bin-index=mysql-bin.index
server-id=1
max_binlog_size = 512M
binlog_format = MIXED
log_slave_updates = 0
expire_logs_days = 7
max_relay_log_size = 512M
binlog-ignore-db = mysql
binlog-ignore-db = test
binlog-ignore-db = information_schema
binlog-ignore-db = performance_schema
replicate-ignore-db = mysql
replicate-ignore-db = test
replicate-ignore-db = information_schema
replicate-ignore-db = performance_schema
binlog_cache_size = 20M
max_binlog_cache_size = 15M

慢查询

slow_query_log=1
long_query_time=2
log-queries-not-using-indexes = TRUE
log_throttle_queries_not_using_indexes=1000
min_examined_row_limit=1000
log-slow-admin-statements = TRUE
log-slow-admin-statements = TRUE

innodb引擎

innodb_file_per_table = 1
innodb_open_files = 1000
innodb_buffer_pool_size = 48G
innodb_thread_concurrency = 0
innodb_purge_threads = 1
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 128M
innodb_log_file_size = 128M
innodb_max_dirty_pages_pct = 85
innodb_lock_wait_timeout = 120
innodb_flush_method=O_DIRECT
innodb_data_file_path = ibdata1:10M:autoextend
innodb_autoinc_lock_mode  = 2
innodb_buffer_pool_dump_at_shutdown = 1
innodb_buffer_pool_load_at_startup  = 1
innodb_support_xa = 0
innodb_status_file  = 1

一.低配置优化说明

以下配置适合4核8G及以下的配置，会让性能稍微提高1/3左右。

测试语句

mysqlslap -uroot -p123456 --concurrency=100 --iterations=30 --auto-generate-sql --auto-generate-sql-load-type=mixed --auto-generate-sql-add-autoincrement --engine=innodb --number-of-queries=5000

没配置的

Average number of seconds to run all queries: 0.735 seconds
Minimum number of seconds to run all queries: 0.551 seconds
Maximum number of seconds to run all queries: 1.141 seconds

优化后的

Average number of seconds to run all queries: 0.691 seconds
Minimum number of seconds to run all queries: 0.630 seconds
Maximum number of seconds to run all queries: 0.749 seconds