Support of Multiple Page Sizes

In standard InnoDB, the size of the read-ahead area is computed dynamically, but it always has the same value. This change makes the size fixed, avoiding unuseful computations.

This feature adds a new system variable for setting it.

System Variables

variable innodb_page_size

Command Line:Yes Config File:Yes Scope: Dynamic:No Variable Type:ULONG Default Value:1 « 14 Range:1 « 12 to 1 « UNIV_PAGE_SIZE_SHIFT_MAX

EXPERIMENTAL: The universal page size of the database. Changing for an existing database is not supported. Use at your own risk!