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##
## WL#4814, 4.1.4 FILE IO
##
## Functional testing of File IO
##
--source include/not_embedded.inc
--source include/have_perfschema.inc
UPDATE performance_schema.setup_instruments SET enabled = 'NO', timed = 'YES';
UPDATE performance_schema.setup_instruments SET enabled = 'YES'
WHERE name LIKE 'wait/io/file/%';
update performance_schema.threads SET instrumented = 'YES'
WHERE PROCESSLIST_ID=connection_id();
# reset lost counters
truncate table performance_schema.events_statements_summary_by_digest;
flush status;
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
#
# TODO: Change to InnoDB when it gets instrumentation
#
CREATE TABLE t1 (id INT PRIMARY KEY, b CHAR(100) DEFAULT 'initial value')
ENGINE=MyISAM;
INSERT INTO t1 (id) VALUES (1), (2), (3), (4), (5), (6), (7), (8);
TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
#
# FF1: Count for file should increase with instrumentation enabled and
# FF2: Count for file should not increase with instrumentation disabled
#
SELECT * FROM t1 WHERE id = 1;
SET @before_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
AND (OBJECT_NAME LIKE '%t1.MYD'));
SELECT (@before_count >= 0) as have_before_count;
SELECT IF(@before_count > 0, 'Success', 'Failure') has_instrumentation;
SELECT * FROM t1 WHERE id < 4;
SET @after_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
AND (OBJECT_NAME LIKE '%t1.MYD') AND (1 = 1));
SELECT (@after_count >= 0) as have_after_count;
SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_ff1_timed;
UPDATE performance_schema.setup_instruments SET enabled='NO';
SET @before_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
AND (OBJECT_NAME LIKE '%t1.MYD') AND (2 = 2));
SELECT (@before_count >= 0) as have_before_count;
SELECT * FROM t1 WHERE id < 6;
SET @after_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile')
AND (OBJECT_NAME LIKE '%t1.MYD') AND (3 = 3));
SELECT (@after_count >= 0) as have_after_count;
SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_ff2_timed;
#
# Check not timed measurements
#
UPDATE performance_schema.setup_instruments SET enabled = 'YES'
WHERE name LIKE 'wait/io/file/%';
UPDATE performance_schema.setup_instruments SET timed = 'NO';
TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
SELECT * FROM t1 WHERE id > 4;
SELECT * FROM performance_schema.events_waits_history_long
WHERE TIMER_WAIT != NULL
OR TIMER_START != NULL
OR TIMER_END != NULL;
SELECT * FROM performance_schema.events_waits_history
WHERE TIMER_WAIT != NULL
OR TIMER_START != NULL
OR TIMER_END != NULL;
SELECT * FROM performance_schema.events_waits_current
WHERE TIMER_WAIT != NULL
OR TIMER_START != NULL
OR TIMER_END != NULL;
UPDATE performance_schema.setup_instruments SET timed = 'YES';
SELECT * FROM t1 WHERE id < 4;
DROP TABLE t1;
#
# FF4: Use-case from Enterprise Monitor
#
--disable_result_log
SELECT SUM(COUNT_READ) AS sum_count_read,
SUM(COUNT_WRITE) AS sum_count_write,
SUM(SUM_NUMBER_OF_BYTES_READ) AS sum_num_bytes_read,
SUM(SUM_NUMBER_OF_BYTES_WRITE) AS sum_num_bytes_write
FROM performance_schema.file_summary_by_instance
WHERE FILE_NAME LIKE CONCAT('%', @@tmpdir, '%') ORDER BY NULL;
--enable_result_log
#
# FF5: Troubleshooting tasks
#
# These queries will give different results based on timing,
# but at least they should not crash.
#
#
# Total and average wait time for different events on system level
#
--disable_result_log
SELECT EVENT_NAME, COUNT_STAR, AVG_TIMER_WAIT, SUM_TIMER_WAIT
FROM performance_schema.events_waits_summary_global_by_event_name
WHERE COUNT_STAR > 0
ORDER BY SUM_TIMER_WAIT DESC
LIMIT 10;
--enable_result_log
#
# Total and average wait time for different users
#
--disable_result_log
SELECT p.processlist_user, SUM(TIMER_WAIT) SUM_WAIT
# ((TIME_TO_SEC(TIMEDIFF(NOW(), i.startup_time)) * 1000) / SUM(TIMER_WAIT)) * 100 WAIT_PERCENTAGE
FROM performance_schema.events_waits_history_long h
INNER JOIN performance_schema.threads p USING (THREAD_ID)
GROUP BY p.processlist_user
ORDER BY SUM_WAIT DESC
LIMIT 20;
--enable_result_log
#
# Total and average wait times for different events for a session
#
--disable_result_log
SELECT h.EVENT_NAME, SUM(h.TIMER_WAIT) TOTAL_WAIT
FROM performance_schema.events_waits_history_long h
INNER JOIN performance_schema.threads p USING (THREAD_ID)
WHERE p.PROCESSLIST_ID = 1
GROUP BY h.EVENT_NAME
HAVING TOTAL_WAIT > 0;
--enable_result_log
#
# Which user reads and writes data
#
--disable_result_log
SELECT p.processlist_user, h.operation, SUM(NUMBER_OF_BYTES) bytes
FROM performance_schema.events_waits_history_long h
INNER JOIN performance_schema.threads p USING (THREAD_ID)
GROUP BY p.processlist_user, h.operation
HAVING BYTES > 0
ORDER BY p.processlist_user, h.operation;
--enable_result_log
# Clean-up.
UPDATE performance_schema.setup_instruments SET enabled = 'YES', timed = 'YES';
# In case of failure, will indicate the root cause
show global status like "performance_schema%";
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