master thread
An InnoDB thread that performs various tasks in the background. Most of these tasks are I/O related, such as writing changes from the insert buffer to the appropriate secondary indexes.
To improve concurrency, sometimes actions are moved from the master thread to separate background threads. For example, in MariaDB 5.6 and higher, dirty pages are flushed from the buffer pool by the page cleaner thread rather than the master thread.
See also buffer pool.
See also dirty page.
See also flush.
See also insert buffer.
See also page cleaner.
See also thread.