crash recovery
The cleanup activities that occur when InnoDB is started again after a crash. Changes that were committed before the crash, but not yet written into the tablespace files, are reconstructed from the doublewrite buffer. When the database is shut down normally, this type of activity is performed during shutdown by the purge operation.
During normal operation, committed data can be stored in the insert buffer for a period of time before being written to the tablespace files. There is always a tradeoff between keeping the tablespace files up-to-date, which introduces performance overhead during normal operation, and buffering the data, which can make shutdown and crash recovery take longer.
See also doublewrite buffer.
See also insert buffer.
See also purge.