Netty

Posted on One min read

Database: a set of physics operation system file or other types file.

Instance: MySQL database is composed of backstage threads and a area of share memory.

InnoDB

Backstage Threads:

  1. Master Thread: flush data in buffer pool into disk.
  2. IO Thread: process AIO’s callback. include 4 write threads, 4 read threads, 1 insert buffer thread, adn 1 log IO thread.
  3. Purge Thread: collect undo log.
  4. Page Cleaner Thread: flush dirty page.

Memory:

  1. buffer pool: data page, index page, insert buffer, adaptive hash index, lock info, data dictionary.
  2. LRU List, Free List, and Flush List.
  3. redo log buffer
  4. additional memory pool

Checkpoint