将MySQL的默认字符集设置为utf8或utf8mb4的方法(本文基于MySQL8.0书写，不保证MySQL5.0有效) |
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MySQL 8.0.23 默认字符集设置方法
MySQL 8.0.23的my.ini配置文件存储位置修改方法1具体操作方法my.ini文件
修改方法2
通过修改my.ini文件达到修改目的
MySQL 8.0.23的my.ini配置文件存储位置
注意事项： 1.下列方法选择其中一种即可完成配置，但在开始配置之前需要将MySQL80服务关闭，否者可能无法修改my.ini文件 2.在使用下面的的文件时请先备份原文件my.ini避免由于配置文件错误造成MySQL无法使用。 由于的版本更新迭代的原因MySQL 8.0.23的my.ini的配置文件被保存在C:\ProgramData\MySQL\MySQL Server 8.0路径下，并不在8.0版本以前的C:\Program Files\MySQL\MySQL Server 8.0路径下 修改方法1 具体操作方法在桌面新建一个TXT文件并将文件重命名为my.ini，将以下my.ini文件代码复制进去并保存 ，然后打开资源管理器在C:\ProgramData\MySQL\MySQL Server 8.0路径下的找到my.ini使用在桌面上新建好的my.ini配置文件替换原文件即可。 注意事项：以下内容为笔者的电脑文件配置，如果在更改后发生异常，请将my.ini文件替换为事先备份的文件，并使用修改方法2完成更改 my.ini文件 # Other default tuning values # MySQL Server Instance Configuration File # ---------------------------------------------------------------------- # Generated by the MySQL Server Instance Configuration Wizard # # # Installation Instructions # ---------------------------------------------------------------------- # # On Linux you can copy this file to /etc/my.cnf to set global options, # mysql-data-dir/my.cnf to set server-specific options # (@localstatedir@ for this installation) or to # ~/.my.cnf to set user-specific options. # # On Windows you should keep this file in the installation directory # of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To # make sure the server reads the config file use the startup option # "--defaults-file". # # To run the server from the command line, execute this in a # command line shell, e.g. # mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini" # # To install the server as a Windows service manually, execute this in a # command line shell, e.g. # mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini" # # And then execute this in a command line shell to start the server, e.g. # net start MySQLXY # # # Guidelines for editing this file # ---------------------------------------------------------------------- # # In this file, you can use all long options that the program supports. # If you want to know the options a program supports, start the program # with the "--help" option. # # More detailed information about the individual options can also be # found in the manual. # # For advice on how to change settings please see # https://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html # # # CLIENT SECTION # ---------------------------------------------------------------------- # # The following options will be read by MySQL client applications. # 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 default-character-set=utf8mb4 port=3306 [mysql] no-beep default-character-set=utf8mb4 # SERVER SECTION # ---------------------------------------------------------------------- # # The following options will be read by the MySQL Server. Make sure that # you have installed the server correctly (see above) so it reads this # file. # # 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 # The TCP/IP Port the MySQL Server will listen on port=3306 # Path to installation directory. All paths are usually resolved relative to this. # basedir="C:/Program Files/MySQL/MySQL Server 8.0/" # Path to the database root datadir=C:/ProgramData/MySQL/MySQL Server 8.0\Data # The default character set that will be used when a new schema or table is # created and no character set is defined character-set-client-handshake = FALSE character-set-server=utf8mb4 collation-server=utf8mb4_unicode_ci init_connect='SET NAMES utf8mb4' # The default authentication plugin to be used when connecting to the server default_authentication_plugin=caching_sha2_password # The default storage engine that will be used when create new tables when default-storage-engine=INNODB # Set the SQL mode to strict sql-mode="STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION" # General and Slow logging. log-output=FILE general-log=0 general_log_file="LAPTOP-3J97FEOS.log" slow-query-log=1 slow_query_log_file="LAPTOP-3J97FEOS-slow.log" long_query_time=10 # Error Logging. log-error="LAPTOP-3J97FEOS.err" # ***** Group Replication Related ***** # Specifies the base name to use for binary log files. With binary logging # enabled, the server logs all statements that change data to the binary # log, which is used for backup and replication. log-bin="LAPTOP-3J97FEOS-bin" # ***** Group Replication Related ***** # Specifies the server ID. For servers that are used in a replication topology, # you must specify a unique server ID for each replication server, in the # range from 1 to 2^32 − 1. “Unique” means that each ID must be different # from every other ID in use by any other source or replica. server-id=1 # ***** Group Replication Related ***** # The host name or IP address of the replica to be reported to the source # during replica registration. This value appears in the output of SHOW REPLICAS # on the source server. Leave the value unset if you do not want the replica to # register itself with the source. # report_host=0.0 # 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=69M # 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 # The size of the buffer that is allocated when sorting MyISAM indexes # during a REPAIR TABLE or when creating indexes with CREATE INDEX # or ALTER TABLE. myisam_sort_buffer_size=129M # 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=64K read_rnd_buffer_size=256K #*** 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=17 # 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 replica 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 replica 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 修改方法2打开C:\ProgramData\MySQL\MySQL Server 8.0路径下的my.ini配置文件 第一步：在[client]下将加入default-character-set=utf8mb4 第二步：在[mysql]下将# default-character-set=修改为default-character-set=utf8mb4 第三步：在[mysqld]下将# character-set-server=改为 character-set-client-handshake = FALSE character-set-server=utf8mb4 collation-server=utf8mb4_unicode_ci init_connect='SET NAMES utf8mb4' |
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