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How big is the buffer pool in MySQL?
As, per config file innodb_buffer_pool_size is set 300M and innodb_buffer_pool_instances is set to 1 (no need, as buffer pool is < 1G). error log file also confirms that buffer pool is set to 300.0M
Why does MySQL take so much memory at startup?
I am facing a very strange problem, looks like on mysql startup, mysql is taking so much memory than 4x of buffer pool size. I am using Ubuntu VM (4 Core 8 GB) with MySQL 5.6.33. /etc/mysql/my.cnf is as below:
How to calculate maximum memory usage in MySQL?
[mysqld] performance_schema = 0 table_cache = 0 table_definition_cache = 0 max-connect-errors = 10000 query_cache_size = 0 query_cache_limit = 0 Good work on server with 256MB Memory. If you are looking for optimizing your docker mysql container then the below command may help.
How is memory reserved for use in MySQL?
MySQL uses memory in two ways: Memory permanently reserved for its use – This category of memory known as “ Global Buffers ” is obtained from the operating system during server boot-up and is not released to any other process.
The total memory allocated for the InnoDB data dictionary in bytes. The total size in pages allocated to the buffer pool. The total size in pages of the buffer pool free list. The total size in pages of the buffer pool LRU list. The total size in pages of the buffer pool old LRU sublist.
Where is the buffer pool located in InnoDB?
The buffer pool is an area in main memory where InnoDB caches table and index data as it is accessed. The buffer pool permits frequently used data to be accessed directly from memory, which speeds up processing. On dedicated servers, up to 80% of physical memory is often assigned to the buffer pool.
When to save and restore buffer pool state?
Page loading happens in the background, and does not delay database startup. In addition to saving the buffer pool state at shutdown and restoring it at startup, you can save and restore the buffer pool state at any time, while the server is running.
How much memory is allocated to the buffer pool?
On dedicated servers, up to 80% of physical memory is often assigned to the buffer pool. For efficiency of high-volume read operations, the buffer pool is divided into pages that can potentially hold multiple rows.