InnoDB page size

PREVIOUS POST
NEXT POST

As maybe you know InnoDB uses hard page size 16Kb for datafiles and for buffer pool.
However this size can be changed if you need it for your workload.

go to file innobase/include/univ.i, lines:

UNIV_PAGE_SIZE is page size (as you see – default value 16Kb). Possible values for UNIV_PAGE_SIZE is 8K, 16K, 32K, 64K. You also have to change UNIV_PAGE_SIZE_SHIFT (according comment it must be 2-logarithm of UNIV_PAGE_SIZE).
For pagesize 8K – UNIV_PAGE_SIZE_SHIFT=13, for 32K – UNIV_PAGE_SIZE_SHIFT=15 and so on.

PREVIOUS POST
NEXT POST

Comments

  1. peter says

    Yes. Playing with different page sizes is good thing to try if you’re trying to get maximum performance. Too bad Innodb currently does not allow to specify it for table or index but it has to be global and requires server rebuild. Generally for certain OLTP workloads you might like to have smaller pages as these allow more distinct peices of data to be in buffer pool. For DSS workloads which require large scans or deal with large rows on the contrary large pages could be good to avoid fragmentation.

  2. Song says

    Hi Vadim Tkachenko,

    I like your idea but i cannot config because i don’t know where is this innobase/include/univ.i. I’m using Cent Os

Leave a Reply

Your email address will not be published. Required fields are marked *