MySQL InnoDB_data_read MySQL is a popular open-source relational database management system that uses the InnoDB storage engine by default. InnoDB is designed for high-performance and reliability, making it a popular choice for many applications. One important aspect of working with InnoDB tables i...
innodb_data_fsyncs:innodb平均每秒进行fsync()操作的次数 5. innodb读写量 innodb_data_read:innodb平均每秒钟读取的数据量,单位为KB innodb_data_written:innodb平均每秒钟写入的数据量,单位为KB 6. innodb缓冲池状态 innodb_buffer_pool_reads: 平均每秒从物理磁盘读取页的次数 innodb_buffer_pool_read_requests:...
在innodb插件版本以后,可以通过查看INFORMATION—SCHEMA中的INNODB_TRX,INNODB_LOCKS,INNODB_LOCK_WAITS三张表来分析存在的锁问题。 具体参见 P207 6.2.2、一致性的非锁定读操作 一致性非锁定读(consistent nonlocking read)是指innodb通过多版本控制(multi versioning)的方式来读取当前执行时间数据库中行的数据。 多版...
1、Innodb_buffer_pool_reads 表示InnoDB缓冲池无法满足的请求,从而到物理磁盘读取页的次数 2、Innodb_buffer_pool_read_ahead 预读次数 3、Innodb_buffer_pool_read_ahead_evicted 预读的页 4、Innodb_buffer_pool_read_requests 从缓冲池中读取页的次数 5、Innodb_data_read 表示Innodb启动后,从物理磁盘上读取的字...
Innodb_data_written表示写入的数据量。 Innodb_data_read表示读取的数据量。 上述命令可以帮助我们了解近年来的数据读写情况。 2. 磁盘空间使用情况 要获取数据库磁盘使用情况,可以执行以下 SQL 查询: SELECTtable_schemaAS'Database',SUM(data_length+index_length)/1024/1024AS'Database Size (MB)',SUM(data_...
write_requests|6962||Innodb_data_fsyncs|157||Innodb_data_pending_fsyncs|0||Innodb_data_pending_reads|0||Innodb_data_pending_writes|0||Innodb_data_read|13962240||Innodb_data_reads|869||Innodb_data_writes|415||Innodb_data_written|4595712||Innodb_dblwr_pages_written|104||Innodb_dblwr_writes...
4. innodb文件读写次数 innodb_data_reads:innodb平均每秒从文件中读取的次数 innodb_data_writes:innodb平均每秒从文件中写入的次数 innodb_data_fsyncs:innodb平均每秒进行fsync()操作的次数 5. innodb读写量 innodb_data_read:innodb平均每秒钟读取的数据量,单位为KB ...
Innodb更改接口:ha_innobase::rnd_next 文档解释:The number of requests to read the next row in the data file. This value is high if you are doing a lot of table scans. Generally this suggests that your tables are not properly indexed or that your queriesare not written to take advantage...
系统表空间是change Buffer的存放区域。关键字:innodb_data_file_path 系统表空间存放路径File-Per-Table Tablespaces存放每个表的独立表空间默认是开启的-->开启后代表每一张表都会生成对应的表空间文件。xxx.ibd结尾的文件都是表的表空间文件查看变量 innodb_file_per_table看是开的还是关的...
Innodb_data_read The amount of data read since the server was started (in bytes). Innodb_data_reads The total number of data reads (OS file reads). Innodb_data_writes The total number of data writes. Innodb_data_written The amount of data written so far, in bytes. Innodb...