mysqlreport是www.hackmysql.com开发的一款基于perl语言编写的状态报告工具, 它将show status 和 show innodb status的输出结果进行处理,使得输出信息的可读性更高。由于是perl编写的脚本,所以需要先安装perl环境,再与mysql数据库连接,因此还需要安装数据库接口DBI 和数据库驱动 DBD-Mysql.
安装DBI
yum install -y perl-DBI
安装mysqlreport
wget http://hackmysql.com/scripts/mysqlreport-3.5.tgztar zxvf mysqlreport-3.5.tgzcd mysqlreport-3.5perl mysqlreport -u root -password 12345
install_driver(mysql) failed: Can't locate DBD/mysql.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 .) at (eval 8) line 3.
Perhaps the DBD::mysql perl module hasn't been fully installed,
or perhaps the capitalisation of 'mysql' isn't right.
Available drivers: DBM, ExampleP, File, Proxy, Sponge.
at ./mysqlreport line 249
出现以上错误,原因是没有安装DBD-mysql
wget http://www.cpan.org/modules/by-module/DBD/DBD-mysql-4.020.tar.gzcd DBD-mysql-4.020perl Makefile.PL --mysql_config=/usr/local/mysql/bin/mysql_configmakemake install
把mysql的这个库文件路径添加进去
echo "/usr/local/mysql/lib/mysql" >> /etc/ld.so.confldconfig
再使用mysqlreport
perl mysqlreport -u root -password 12345
脚本有些小的bug,会出现以下错误信息
Use of uninitialized value in multiplication (*) at mysqlreport line 829.Use of uninitialized value in formline at mysqlreport line 1227.Use of uninitialized value in formline at mysqlreport line 1235.
829行修改成如下方式,则不再提示错误
my $is = @_;my $of = @_;return sprintf "%.2f", ($is * 100) / ($of ||= 1);
再分析1227和1235行错误
1227 $stats{'Innodb_buffer_pool_pages_latched'}, perc($stats{'Innodb_buffer_pool_pages_latched'}, $stats{'Innodb_buffer_pool_pages_total'})
1235 $stats{'Innodb_buffer_pool_read_ahead_seq'}, t($stats{'Innodb_buffer_pool_read_ahead_seq'})
查看mysql官方手册
Innodb_buffer_pool_pages_latched
The number of latched pages in InnoDB buffer pool. These are pages currently being read or written or that cannot be flushed or removed for some other reason. Calculation of this variable is expensive, so as of MySQL 5.1.28, it is available only when the UNIV_DEBUG system is defined at server build time.
5.1.28后不默认提供这个参数了。除非编译的时候强制指定。
Innodb_buffer_pool_read_ahead_seq
The number of sequential read-aheads initiated by InnoDB
. This happens when InnoDB
does a sequential full table scan.
For InnoDB Plugin
, this variable was removed in MySQL 5.1.41.
这个变量是InnoDB的存储引擎插件,在5.1.41以后就已经被移除,这里我的数据库是5.5.25
最后执行mysqlreport -u -password 12345看看,以下是部分输出结果的显示
本文出自 “老徐的私房菜” 博客,谢绝转载!

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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