原创 14.6.12.1 Configuring Persistent Optimizer Statist
The persistent optimizer statistics feature improves plan stability by storing statistics to disk and making them persis
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原创 14.6.12Configuring Optimizer Statistics for InnoDB
14.6.12.1 Configuring Persistent Optimizer Statistics Parameters14.6.12.2 Configuring Non-Persistent Optimizer Statistic
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原创 14.6.9Configuring the InnoDB MasterThread I/O Rate
The master thread in InnoDB is a thread that performs various tasks in the background. Most of these tasks are I/O relat
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原创 14.6.6 Configuring Thread Concurrency for InnoDB
InnoDB uses operating system threads to process requests from user transactions. (Transactions may issue many requests t
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原创 14.6.10 Configuring Spin Lock Polling
Many InnoDB mutexes and rw-locks are reserved for a short time. On a multi-core system, it can be more efficient for a t
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原创 14.6.11 Configuring InnoDB Purge Scheduling
The purge operations (a type of garbage collection) that InnoDB performs automatically may be performed by one or more s
2019-03-05 13:07:02
原创 14.6.7 Configuring the Number of Background InnoDB
InnoDB uses background threads to service various types of I/O requests. You can configure the number of background thre
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原创 14.6.8 Using Asynchronous I/O on Linux
InnoDB uses the asynchronous I/O subsystem (native AIO) on Linux to perform readahead and write requests for data file p
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原创 14.6.5.1Configuring the Change Buffer Maximum Size
As of MySQL 5.6.2, the innodb_change_buffer_max_size configuration option allows you to configure the maximum size of th
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原创 14.6.3.7 Fine-tuning InnoDB Buffer Pool Flushing
The configuration options innodb_flush_neighbors and innodb_lru_scan_depth let you fine-tune aspects of the flushing pro
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原创 14.6.3.8 Saving and Restoring the Buffer Pool Stat
To reduce the warmup period after restarting the server, InnoDB saves a percentage of the most recently used pages for e
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原创 髒讀，不可重複讀，幻讀講解
首先我們先討論一下問題，是不是在ACID的保護下，數據就一定不會產生不一致的現象呢？ 在關係數據庫庫系統中，多個會話可以訪問同一個數據庫的同一個表的同一行，這樣，對於數據而言，就意味着在同一個時間內，有多個會話可以對其施加操作(或讀操作或
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原创 14.6.3.9 Monitoring the Buffer Pool
InnoDB Standard Monitor output, which can be accessed using SHOW ENGINE INNODB STATUS, provides metrics that pertain to
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原创 14.6.5 Configuring InnoDB Change Buffering
14.6.5.1 Configuring the Change Buffer Maximum SizeWhen INSERT, UPDATE, and DELETE operations are performed on a table,
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原创 14.6.4 Configuring the Memory Allocator for InnoDB
When InnoDB was developed, the memory allocators supplied with operating systems and run-time libraries were often lacki
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