Innodb buffer pool

The buffer pool permits frequently used data to be processed directly from memory, which speeds up processing. On dedicated servers, up to of physical memory is often assigned to the buffer pool. To enable multiple buffer pool instances, set the innodb_buffer_pool _instances configuration option to a value greater than (the default) up to (the maximum). Behavior described in this section applies to both methods.

My last post about Innodb Performance Optimization got a lot of comments choosing proper innodb_buffer_pool _size and indeed I oversimplified things a bit too much, so let me write a bit better description. Innodb Buffer Pool is by far the most important option for Innodb Performance and it must be set correctly. Your innodb_buffer_pool _size is enormous. If you only have 5GB of InnoDB data and indexes, then you should only have about 8GB. What to set innodb_buffer_pool and why.

The dramatic change in the restoration time makes me dive deeper into the MySQL performance tuning. There are around 4settings in MySQL 5. I feel the most important variable setting is innodb_buffer_pool _size. InnoDB maintains a storage area called the buffer pool for caching data and indexes in memory. By keeping the frequently-accessed data in memory, related searches are retrieved much faster than reading from disk. This new feature also introduced a new variable — innodb_buffer_pool _chunk_size — which defines the chunk size by which the buffer pool is enlarged or reduced.

What you need to calculate is how much of the InnoDB Buffer Pool is loaded at any given moment on the current DB Server. Nested transactions may fail if started after the buffer pool resize has begun. If you attempt to set a different figure, the value is automatically adjusted to a multiple of at least the attempted size. UPDATE : As of MySQL 5. SET statement, allowing you to resize the buffer pool without restarting the server.

If you do flush the buffer _ pool , you could watch for changes in Innodb_buffer_pool _reads to give a precise(?) count of the number of pages read in a cold system. I understand I need to increase innodb_buffer_pool_size. The current setting is about 100m) and my dataset is quite large. InnoDB buffer pool actually serves multiple purposes.

The table I intended to create should return more than million rows with lots of textual returns. I am a historian and not very experienced in changing MySQL option files. InnoDB or XtraDB is normally the default storage engine with MariaDB.

You should set innodb_buffer_pool _size to about of your memory. The goal is to ensure that of your working set is in memory! This allows frequently accessed data to be returned quickly, without the need of spinning up a physical hard drive. The Information Schema INNODB_BUFFER_POOL _STATS table contains information about pages in the buffer pool , similar to what is returned with the SHOW ENGINE INNODB STATUS statement.

This is one of the most important settings in the. He used some special INFORMATION_SCHEMA tables developed for Percona Server 5. InnoDB table and index resides in your buffer pool. The MySQL manual to this day refers to this rule, so who can blame the DBA?

The question is: does it makes sense? Temporarily comment out innodb_buffer_pool _load_at_startup, but keep innodb_buffer_pool _dump_at_shutdown in there and restart 5.