# MySQL服务实例配置文件

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# 本文件有MySQL服务实例配置向导产生，但可以手工创建

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#

# 在windows，你需要将文件存放到mysql安装路径，诸如：C:\Program Files\MySQL\MySQL Server X.Y，X.Y是版本号

# 在启动时，命令行：mysqld --defaults-file=“你的my.ini文件位置，含路径"

# 诸如：mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"

# 如果希望当成windows服务的形式启动mysql服务，则在命令行执行如下命令

# mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"

# 此命令是将Mysql添加到windows服务，添加后，通过如下命令启动服务

# net start MySQLXY

#

# 编辑此文件指南

# ----------------------------------------------------------------------

#

# 在这个文件里，你能使用mysqld支持的所有选项，可以通过mysqld --verbose --help查看支持的选项

#

# 关于具体详情，请查询帮助手册

#

# For advice on how to change settings please see

#

#

# 客户端配置区

# ----------------------------------------------------------------------

# 以下选项将由MySQL客户端应用程序读取

# Note that only client applications shipped by MySQL are guaranteed

# to read this section. If you want your own MySQL client program to

# honor these values, you need to specify it as an option during the

# MySQL client library initialization.

#

[client]

# pipe=

# socket=MYSQL

port=3306

[mysql]

no-beep

# 缺省的字符集，如果希望支持中文，可以配置gb2312、gbk或者 utf8

# default-character-set=

# 服务端配置区

# ----------------------------------------------------------------------

#

# 以下选项将由MySQL服务读取，请确保服务正确安装

#

# server_type=3

[mysqld]

# The next three options are mutually exclusive to SERVER_PORT below.

# skip-networking

# enable-named-pipe

# shared-memory

# shared-memory-base-name=MYSQL

# The Pipe the MySQL Server will use

# socket=mysql=MYSQL

# MySQL服务器监听的端口号

port=3306

# MySQL安装路径，通常如下格式，注意使用的 /

# basedir="C:/Program Files/MySQL/MySQL Server 8.0/"

# 数据库路径

datadir=C:/ProgramData/MySQL/MySQL Server 8.0/Data

# 缺省的字符集，当创建数据库或表时，如果没有指定字符集，则采用此默认值

# character-set-server=

# 缺省的身份验证插件，当客户端连接到服务器时采用默认插件验证身份

default_authentication_plugin=caching_sha2_password

# 缺省的存储引擎，当建立新表时

default-storage-engine=INNODB

# 设置SQL mode 为 strict，通过这个参数可以设置检验SQL语句的严格程度

sql-mode="STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION"

# General and Slow logging.

log-output=FILE

general-log=0

general_log_file="mysql.log"

slow-query-log=1

slow_query_log_file="mysql-slow.log"

long_query_time=10

# Binary Logging.

# log-bin

# Error Logging.

log-error="myql.err"

# Server Id.

server-id=1

# Specifies the on how table names are stored in the metadata.

# If set to 0, will throw an error on case-insensitive operative systems

# If set to 1, table names are stored in lowercase on disk and comparisons are not case sensitive.

# If set to 2, table names are stored as given but compared in lowercase.

# This option also applies to database names and table aliases.

# NOTE: Modify this value after Server initialization won't take effect.

lower_case_table_names=1

# Secure File Priv.

secure-file-priv="C:/ProgramData/MySQL/MySQL Server 8.0/Uploads"

# The maximum amount of concurrent sessions the MySQL server will

# allow. One of these connections will be reserved for a user with

# SUPER privileges to allow the administrator to login even if the

# connection limit has been reached.

max_connections=151

# The number of open tables for all threads. Increasing this value

# increases the number of file descriptors that mysqld requires.

# Therefore you have to make sure to set the amount of open files

# allowed to at least 4096 in the variable "open-files-limit" in

# section [mysqld_safe]

table_open_cache=2000

# Maximum size for internal (in-memory) temporary tables. If a table

# grows larger than this value, it is automatically converted to disk

# based table This limitation is for a single table. There can be many

# of them.

tmp_table_size=16M

# How many threads we should keep in a cache for reuse. When a client

# disconnects, the client's threads are put in the cache if there aren't

# more than thread_cache_size threads from before. This greatly reduces

# the amount of thread creations needed if you have a lot of new

# connections. (Normally this doesn't give a notable performance

# improvement if you have a good thread implementation.)

thread_cache_size=10

#*** MyISAM Specific options

# The maximum size of the temporary file MySQL is allowed to use while

# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.

# If the file-size would be bigger than this, the index will be created

# through the key cache (which is slower).

myisam_max_sort_file_size=100G

# If the temporary file used for fast index creation would be bigger

# than using the key cache by the amount specified here, then prefer the

# key cache method. This is mainly used to force long character keys in

# large tables to use the slower key cache method to create the index.

myisam_sort_buffer_size=8M

# Size of the Key Buffer, used to cache index blocks for MyISAM tables.

# Do not set it larger than 30% of your available memory, as some memory

# is also required by the OS to cache rows. Even if you're not using

# MyISAM tables, you should still set it to 8-64M as it will also be

# used for internal temporary disk tables.

key_buffer_size=8M

# Size of the buffer used for doing full table scans of MyISAM tables.

# Allocated per thread, if a full scan is needed.

read_buffer_size=0

read_rnd_buffer_size=0

#*** INNODB Specific options ***

# innodb_data_home_dir=

# Use this option if you have a MySQL server with InnoDB support enabled

# but you do not plan to use it. This will save memory and disk space

# and speed up some things.

# skip-innodb

# If set to 1, InnoDB will flush (fsync) the transaction logs to the

# disk at each commit, which offers full ACID behavior. If you are

# willing to compromise this safety, and you are running small

# transactions, you may set this to 0 or 2 to reduce disk I/O to the

# logs. Value 0 means that the log is only written to the log file and

# the log file flushed to disk approximately once per second. Value 2

# means the log is written to the log file at each commit, but the log

# file is only flushed to disk approximately once per second.

innodb_flush_log_at_trx_commit=1

# The size of the buffer InnoDB uses for buffering log data. As soon as

# it is full, InnoDB will have to flush it to disk. As it is flushed

# once per second anyway, it does not make sense to have it very large

# (even with long transactions).

innodb_log_buffer_size=1M

# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and

# row data. The bigger you set this the less disk I/O is needed to

# access data in tables. On a dedicated database server you may set this

# parameter up to 80% of the machine physical memory size. Do not set it

# too large, though, because competition of the physical memory may

# cause paging in the operating system. Note that on 32bit systems you

# might be limited to 2-3.5G of user level memory per process, so do not

# set it too high.

innodb_buffer_pool_size=8M

# Size of each log file in a log group. You should set the combined size

# of log files to about 25%-100% of your buffer pool size to avoid

# unneeded buffer pool flush activity on log file overwrite. However,

# note that a larger logfile size will increase the time needed for the

# recovery process.

innodb_log_file_size=48M

# Number of threads allowed inside the InnoDB kernel. The optimal value

# depends highly on the application, hardware as well as the OS

# scheduler properties. A too high value may lead to thread thrashing.

innodb_thread_concurrency=9

# The increment size (in MB) for extending the size of an auto-extend InnoDB system tablespace file when it becomes full.

innodb_autoextend_increment=64

# The number of regions that the InnoDB buffer pool is divided into.

# For systems with buffer pools in the multi-gigabyte range, dividing the buffer pool into separate instances can improve concurrency,

# by reducing contention as different threads read and write to cached pages.

innodb_buffer_pool_instances=8

# Determines the number of threads that can enter InnoDB concurrently.

innodb_concurrency_tickets=5000

# Specifies how long in milliseconds (ms) a block inserted into the old sublist must stay there after its first access before

# it can be moved to the new sublist.

innodb_old_blocks_time=1000

# It specifies the maximum number of .ibd files that MySQL can keep open at one time. The minimum value is 10.

innodb_open_files=300

# When this variable is enabled, InnoDB updates statistics during metadata statements.

innodb_stats_on_metadata=0

# When innodb_file_per_table is enabled (the default in 5.6.6 and higher), InnoDB stores the data and indexes for each newly created table

# in a separate .ibd file, rather than in the system tablespace.

innodb_file_per_table=1

# Use the following list of values: 0 for crc32, 1 for strict_crc32, 2 for innodb, 3 for strict_innodb, 4 for none, 5 for strict_none.

innodb_checksum_algorithm=0

# The number of outstanding connection requests MySQL can have.

# This option is useful when the main MySQL thread gets many connection requests in a very short time.

# It then takes some time (although very little) for the main thread to check the connection and start a new thread.

# The back_log value indicates how many requests can be stacked during this short time before MySQL momentarily

# stops answering new requests.

# You need to increase this only if you expect a large number of connections in a short period of time.

back_log=80

# If this is set to a nonzero value, all tables are closed every flush_time seconds to free up resources and

# synchronize unflushed data to disk.

# This option is best used only on systems with minimal resources.

flush_time=0

# The minimum size of the buffer that is used for plain index scans, range index scans, and joins that do not use

# indexes and thus perform full table scans.

join_buffer_size=256K

# The maximum size of one packet or any generated or intermediate string, or any parameter sent by the

# mysql_stmt_send_long_data() C API function.

max_allowed_packet=4M

# If more than this many successive connection requests from a host are interrupted without a successful connection,

# the server blocks that host from performing further connections.

max_connect_errors=100

# Changes the number of file descriptors available to mysqld.

# You should try increasing the value of this option if mysqld gives you the error "Too many open files".

open_files_limit=4161

# If you see many sort_merge_passes per second in SHOW GLOBAL STATUS output, you can consider increasing the

# sort_buffer_size value to speed up ORDER BY or GROUP BY operations that cannot be improved with query optimization

# or improved indexing.

sort_buffer_size=256K

# The number of table definitions (from .frm files) that can be stored in the definition cache.

# If you use a large number of tables, you can create a large table definition cache to speed up opening of tables.

# The table definition cache takes less space and does not use file descriptors, unlike the normal table cache.

# The minimum and default values are both 400.

table_definition_cache=1400

# Specify the maximum size of a row-based binary log event, in bytes.

# Rows are grouped into events smaller than this size if possible. The value should be a multiple of 256.

binlog_row_event_max_size=8K

# If the value of this variable is greater than 0, a replication slave synchronizes its master.info file to disk.

# (using fdatasync()) after every sync_master_info events.

sync_master_info=10000

# If the value of this variable is greater than 0, the MySQL server synchronizes its relay log to disk.

# (using fdatasync()) after every sync_relay_log writes to the relay log.

sync_relay_log=10000

# If the value of this variable is greater than 0, a replication slave synchronizes its relay-log.info file to disk.

# (using fdatasync()) after every sync_relay_log_info transactions.

sync_relay_log_info=10000

# Load mysql plugins at start."plugin_x ; plugin_y".

# plugin_load

# The TCP/IP Port the MySQL Server X Protocol will listen on.

loose_mysqlx_port=33060