config root man

#
# Test the persistent stats auto recalc
#

-- source include/have_innodb.inc
# Page numbers printed by this test depend on the page size
-- source include/have_innodb_16k.inc

-- vertical_results

-- let $check_stats1 = SELECT n_rows, clustered_index_size FROM mysql.innodb_table_stats WHERE table_name = 'autorecalc'
-- let $check_stats2 = SELECT index_name, stat_name, stat_value FROM mysql.innodb_index_stats WHERE table_name = 'autorecalc'

CREATE TABLE autorecalc (a INT, PRIMARY KEY (a)) ENGINE=INNODB;

# the CREATE should have inserted zeroed stats
-- eval $check_stats1
-- eval $check_stats2

INSERT INTO autorecalc VALUES (1);
INSERT INTO autorecalc VALUES (2);

# wait for the bg stats thread to update the stats, notice we wait on
# innodb_index_stats because innodb_table_stats gets updated first and
# it is possible that (if we wait on innodb_table_stats) the wait cond
# gets satisfied before innodb_index_stats is updated
let $wait_condition = SELECT stat_value = 2 FROM mysql.innodb_index_stats WHERE table_name = 'autorecalc' AND index_name = 'PRIMARY' AND stat_name = 'n_diff_pfx01';
-- source include/wait_condition.inc

# the second INSERT from above should have triggered an auto-recalc
-- eval $check_stats1
-- eval $check_stats2

# now DELETE the rows and trigger a second auto-recalc, InnoDB may wait a
# few seconds before triggering an auto-recalc again (it tries not to be too
# aggressive)

DELETE FROM autorecalc;

let $wait_timeout = 25;
let $wait_condition = SELECT stat_value = 0 FROM mysql.innodb_index_stats WHERE table_name = 'autorecalc' AND index_name = 'PRIMARY' AND stat_name = 'n_diff_pfx01';
-- source include/wait_condition.inc

# the DELETE from above should have triggered an auto-recalc
-- eval $check_stats1
-- eval $check_stats2

DROP TABLE autorecalc;