Improved InnoDB I/O Scalability¶
Because InnoDB is a complex storage engine it must be configured properly in order to perform at its best. Some points are not configurable in standard InnoDB. The goal of this feature is to provide a more exhaustive set of options for XtraDB.
Version Specific Information¶
8.0.12-1- the feature was ported from Percona Server for MySQL 5.7.
Command Line: Yes Config File: Yes Scope: Global Dyn: No Variable Type: Enumeration Default Value:
Starting from Percona Server for MySQL 8.0.20-11, the innodb_flush_method affects doublewrite buffers exactly the same as in MySQL 8.0.20.
The following information has been added to
SHOW ENGINE INNODB STATUS to confirm the checkpointing activity:
The max checkpoint age The current checkpoint age target The current age of the oldest page modification which has not been flushed to disk yet. The current age of the last checkpoint ... --- LOG --- Log sequence number 0 1059494372 Log flushed up to 0 1059494372 Last checkpoint at 0 1055251010 Max checkpoint age 162361775 Checkpoint age target 104630090 Modified age 4092465 Checkpoint age 4243362 0 pending log writes, 0 pending chkp writes ...