我看过好多关于Linux下没有my.cnf的博客,都是什么rmp安装没有my.cnf文件啊,然后什么两个方法啊,我就无语了,大家要是知道就不会查资料了,你们敢不敢负责点?说详细点?有的说从 /usr/share/mysql 里复制一个.cnf文件到 /etc 下,有用吗?配置文件资料不
我看过好多关于Linux下没有my.cnf的博客,都是什么rmp安装没有my.cnf文件啊,然后什么两个方法啊,我就无语了,大家要是知道就不会查资料了,你们敢不敢负责点?说详细点?有的说从 /usr/share/mysql 里复制一个.cnf文件到 /etc 下,有用吗?配置文件资料不给别人,复制个毛线?复制谁都会!
my.cnf 配置文件:
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html # *** DO NOT EDIT THIS FILE. It's a template which will be copied to the # *** default location during install, and will be replaced if you # *** upgrade to a newer version of MySQL. [mysqld] #innodb # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. innodb_buffer_pool_size = 4000M innodb_additional_mem_pool_size=60M innodb_data_home_dir= innodb_date_file_path=ibdata1:20M:autoextend innodb_log_group_home_dir=/var/log/innodb_log innodb_log_files_in_group=2 innodb_log_file_size=30M innodb_log_buffer_size=3M innodb_doublewrite=ON innodb_open_file=2000 innodb_file_per_table=ON innodb_max_dirty_page_pct=50 back_log=80 interactive_timeout=3600 key_buffer_size=10M max_allow_packet=40440 max_connections=1000 max_tmp_tables=60 query_cache_size=10M sor_buffer_size=10M table_open_cache=2000 # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. #lob_bin log_bin=ON log_bin_basename=/var/lib/mysql/mysqld-bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. join_buffer_size = 128M sort_buffer_size = 2M read_rnd_buffer_size = 2M datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock character_set_server=utf8 #init_connect='SET NAMES utf8' # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Recommended in standard MySQL setup sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES #general_log general_log=ON general_log_file=/var/lib/mysql/localhost.log #slow_query_log slow_query_log=ON slow_query_log_file=/var/lib/mysql/localhost-slow.log slow_launch_time=2 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid如果上述文件配置好后,执行mysql登录,抛出xxxx.line 这样的异常,就去/usr/share/mysql 下面复制一个.cnf文件的头部替换掉上述my.cnf的头部代码,前提是要copy一个到/etc下,命名my.cnf,再把上面的copy,版本信息和一些详细文件的
具体路径配置,和参数配置看你自己的安装情况
我替换的是/usr/share/mysql/my-default.cnf 头文件的这几句:
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html # *** DO NOT EDIT THIS FILE. It's a template which will be copied to the # *** default location during install, and will be replaced if you # *** upgrade to a newer version of MySQL. [mysqld]然后[mysqlld]以下的全部是copy上面的,从上面配置文件的第7行的#号开始,可以解决类似Fatal error in defaults handling. Program aborted 或者xxxx line xxxx 错误的问题,根据你服务器的具体情况具体分析,我的是以我配置的为基准的
配置完之后,mysql可以正常登录,查看和启动日志:
mysql> show variables like 'log_%'; +----------------------------------------+------------------------------------+ | Variable_name | Value | +----------------------------------------+------------------------------------+ | log_bin | OFF | | log_bin_basename | | | log_bin_index | | | log_bin_trust_function_creators | OFF | | log_bin_use_v1_row_events | OFF | | log_error | /var/lib/mysql/AY140615022008Z.err | | log_output | FILE | | log_queries_not_using_indexes | OFF | | log_slave_updates | OFF | | log_throttle_queries_not_using_indexes | 0 | | log_warnings | 1 | +----------------------------------------+------------------------------------+ 11 rows in set (0.01 sec) mysql> show variables like 'log_bin'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_bin | OFF | +---------------+-------+ 1 row in set (0.00 sec)
mysql> select version(); +-----------+ | version() | +-----------+ | 5.6.10 | +-----------+ 1 row in set (0.02 sec)需要开启的可以自己设置,希望可以帮到大家,少走歪路!

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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