MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
These views summarize table statistics, including
InnoDB buffer pool statistics. By default,
rows are sorted by descending total wait time (tables with
most contention first).
These views user a helper view,
x$ps_schema_table_statistics_io.
The
schema_table_statistics_with_buffer
and
x$schema_table_statistics_with_buffer
views have these columns:
table_schemaThe schema that contains the table.
table_nameThe table name.
rows_fetchedThe total number of rows read from the table.
fetch_latencyThe total wait time of timed read I/O events for the table.
rows_insertedThe total number of rows inserted into the table.
insert_latencyThe total wait time of timed insert I/O events for the table.
rows_updatedThe total number of rows updated in the table.
update_latencyThe total wait time of timed update I/O events for the table.
rows_deletedThe total number of rows deleted from the table.
delete_latencyThe total wait time of timed delete I/O events for the table.
io_read_requestsThe total number of read requests for the table.
io_readThe total number of bytes read from the table.
io_read_latencyThe total wait time of reads from the table.
io_write_requestsThe total number of write requests for the table.
io_writeThe total number of bytes written to the table.
io_write_latencyThe total wait time of writes to the table.
io_misc_requestsThe total number of miscellaneous I/O requests for the table.
io_misc_latencyThe total wait time of miscellaneous I/O requests for the table.
innodb_buffer_allocatedThe total number of
InnoDBbuffer bytes allocated for the table.innodb_buffer_dataThe total number of
InnoDBdata bytes allocated for the table.innodb_buffer_freeThe total number of
InnoDBnondata bytes allocated for the table (innodb_buffer_allocated−innodb_buffer_data).innodb_buffer_pagesThe total number of
InnoDBpages allocated for the table.innodb_buffer_pages_hashedThe total number of
InnoDBhashed pages allocated for the table.innodb_buffer_pages_oldThe total number of
InnoDBold pages allocated for the table.innodb_buffer_rows_cachedThe total number of
InnoDBcached rows for the table.