ProHoster > ื‘ืœื•ื’ > ืžื™ื ื”ืœ > ืื—ืช ื”ืฉื™ื˜ื•ืช ืœืงื‘ืœืช ื”ื™ืกื˜ื•ืจื™ื™ืช ื ืขื™ืœื” ื‘-PostgreSQL

ืื—ืช ื”ืฉื™ื˜ื•ืช ืœืงื‘ืœืช ื”ื™ืกื˜ื•ืจื™ื™ืช ื ืขื™ืœื” ื‘-PostgreSQL

ื”ืžืฉืš ื”ืžืืžืจ"ื ื™ืกื™ื•ืŸ ืœื™ืฆื•ืจ ืื ืœื•ื’ื™ ืฉืœ ASH ืขื‘ื•ืจ PostgreSQL ".

ื”ืžืืžืจ ื™ืฉืงื•ืœ ื•ื™ืจืื” ืขืœ ืฉืื™ืœืชื•ืช ื•ื“ื•ื’ืžืื•ืช ืกืคืฆื™ืคื™ื•ืช ืื™ื–ื” ืžื™ื“ืข ืฉื™ืžื•ืฉื™ ื ื™ืชืŸ ืœื”ืฉื™ื’ ื‘ืืžืฆืขื•ืช ื”ื™ืกื˜ื•ืจื™ื™ืช ื”ืชืฆื•ื’ื•ืช pg_locks.

ืื–ื”ืจื”
ื‘ืฉืœ ื—ื™ื“ื•ืฉ ื”ื ื•ืฉื ื•ื—ื•ืกืจ ื”ืฉืœืžื•ืช ืฉืœ ืชืงื•ืคืช ื”ื‘ื“ื™ืงื•ืช, ื”ืžืืžืจ ืขืฉื•ื™ ืœื”ื›ื™ืœ ืฉื’ื™ืื•ืช. ื‘ื™ืงื•ืจืช ื•ื”ืขืจื•ืช ื™ืชืงื‘ืœื• ื‘ื‘ืจื›ื” ื•ืฆืคื•ื™ื”.

ืงืœื˜ ื ืชื•ื ื™ื

ื”ื™ืกื˜ื•ืจื™ื™ืช ื™ื™ืฆื•ื’ pg_locks

ื ืขื™ืœืช_ืืจื›ื™ื•ืŸ

CREATE TABLE archive_locking 
(       timepoint timestamp without time zone ,
	locktype text ,
	relation oid ,
	mode text ,
	tid xid ,
	vtid text ,
	pid integer ,
	blocking_pids integer[] ,
	granted boolean ,
        queryid bigint 
);

ื‘ืขื™ืงืจื•ืŸ, ื”ื˜ื‘ืœื” ื“ื•ืžื” ืœื˜ื‘ืœื” archive_pg_stat_activityืžืชื•ืืจ ื‘ืคื™ืจื•ื˜ ืจื‘ ื™ื•ืชืจ ื›ืืŸ - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? ื•ื”ื ื” - ื ื™ืกื™ื•ืŸ ืœื™ืฆื•ืจ ืื ืœื•ื’ื™ ืฉืœ ASH ืขื‘ื•ืจ PostgreSQL.

ื›ื“ื™ ืœืžืœื ืขืžื•ื“ื” queryid ื ืขืฉื” ืฉื™ืžื•ืฉ ื‘ืคื•ื ืงืฆื™ื”

update_history_locking_by_queryid

--update_history_locking_by_queryid.sql
CREATE OR REPLACE FUNCTION update_history_locking_by_queryid() RETURNS boolean AS $$
DECLARE
  result boolean ;
  current_minute double precision ; 
  
  start_minute integer ;
  finish_minute integer ;
  
  start_period timestamp without time zone ;
  finish_period timestamp without time zone ;
  
  lock_rec record ; 
  endpoint_rec record ; 
  
  current_hour_diff double precision ;
BEGIN
  RAISE NOTICE '***update_history_locking_by_queryid';
  
  result = TRUE ;
  
  current_minute = extract ( minute from now() );

  SELECT * FROM endpoint WHERE is_need_monitoring
  INTO endpoint_rec ;
  
  current_hour_diff = endpoint_rec.hour_diff ;
  
  IF current_minute < 5 
  THEN
	RAISE NOTICE 'Current time is less than 5 minute.';
	
	start_period = date_trunc('hour',now()) + (current_hour_diff * interval '1 hour');
    finish_period = start_period - interval '5 minute' ;
  ELSE 
    finish_minute =  extract ( minute from now() ) / 5 ;
    start_minute =  finish_minute - 1 ;
  
    start_period = date_trunc('hour',now()) + interval '1 minute'*start_minute*5+(current_hour_diff * interval '1 hour');
    finish_period = date_trunc('hour',now()) + interval '1 minute'*finish_minute*5+(current_hour_diff * interval '1 hour') ;
    
  END IF ;  
  
  RAISE NOTICE 'start_period = %', start_period;
  RAISE NOTICE 'finish_period = %', finish_period;

	FOR lock_rec IN   
	WITH act_queryid AS
	 (
		SELECT 
				pid , 
				timepoint ,
				query_start AS started ,			
				MAX(timepoint) OVER (PARTITION BY pid ,	query_start   ) AS finished ,			
				queryid 
		FROM 
				activity_hist.history_pg_stat_activity 			
		WHERE 			
				timepoint BETWEEN start_period and 
								  finish_period
		GROUP BY 
				pid , 
				timepoint ,  
				query_start ,
				queryid 
	 ),
	 lock_pids AS
		(
			SELECT
				hl.pid , 
				hl.locktype  ,
				hl.mode ,
				hl.timepoint , 
				MIN ( timepoint ) OVER (PARTITION BY pid , locktype  ,mode ) as started 
			FROM 
				activity_hist.history_locking hl
			WHERE 
				hl.timepoint between start_period and 
								     finish_period
			GROUP BY 
				hl.pid , 
				hl.locktype  ,
				hl.mode ,
				hl.timepoint 
		)
	SELECT 
		lp.pid , 
		lp.locktype  ,
		lp.mode ,
		lp.timepoint ,     
		aq.queryid 
	FROM lock_pids 	lp LEFT OUTER JOIN act_queryid aq ON ( lp.pid = aq.pid AND lp.started BETWEEN aq.started AND aq.finished )
	WHERE aq.queryid IS NOT NULL 
	GROUP BY  
		lp.pid , 
		lp.locktype  ,
		lp.mode ,
		lp.timepoint , 
		aq.queryid
	LOOP
		UPDATE activity_hist.history_locking SET queryid = lock_rec.queryid 
		WHERE pid = lock_rec.pid AND locktype = lock_rec.locktype AND mode = lock_rec.mode AND timepoint = lock_rec.timepoint ;	
	END LOOP;    
  
  RETURN result ;
END
$$ LANGUAGE plpgsql;

ื”ืกื‘ืจ: ื”ืขืจืš ืฉืœ ื”ืขืžื•ื“ื” queryid ืžืชืขื“ื›ืŸ ื‘ื˜ื‘ืœืช history_locking, ื•ืœืื—ืจ ืžื›ืŸ ื›ืืฉืจ ื ื•ืฆืจืช ืžื—ื™ืฆื” ื—ื“ืฉื” ืขื‘ื•ืจ ื˜ื‘ืœืช archive_locking, ื”ืขืจืš ื™ืื•ื—ืกืŸ ื‘ืขืจื›ื™ื ื”ื™ืกื˜ื•ืจื™ื™ื.

ืคืœื˜

ืžื™ื“ืข ื›ืœืœื™ ืขืœ ืชื”ืœื™ื›ื™ื ื‘ืื•ืคืŸ ื›ืœืœื™.

ืžืžืชื™ืŸ ืœืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื

ื‘ืงืฉื”

WITH
t AS
(
	SELECT 
		locktype  ,
		mode ,
		count(*) as total 
	FROM 
		activity_hist.archive_locking
	WHERE 
		timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND 
		NOT granted
	GROUP BY 
		locktype  ,
		mode  
)
SELECT 
	locktype  ,
	mode ,
	total * interval '1 second' as duration			
FROM t 		
ORDER BY 3 DESC

ื“ื•ื’ืžื”

| ืžืžืชื™ืŸ ืœืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื +-------------------+------------------------------ -------+--------------------------- | ืกื•ื’ ื ืขื™ืœื”| ืžืฆื‘| ืžืฉืš +---------------------+---------------------- ---+-- ------------------ | ืขืกืงืื•ืช| sharelock| 19:39:26 | tuple| AccessExclusiveLock| 00:03:35 +--------------------+---------------------------- -------+----------------------

ืœืงื™ื—ืช ืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื

ื‘ืงืฉื”

WITH
t AS
(
	SELECT 
		locktype  ,
		mode ,
		count(*) as total 
	FROM 
		activity_hist.archive_locking
	WHERE 
		timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND 
		granted
	GROUP BY 
		locktype  ,
		mode  
)
SELECT 
	locktype  ,
	mode ,
	total * interval '1 second' as duration			
FROM t 		
ORDER BY 3 DESC

ื“ื•ื’ืžื”

| ืœืงื™ื—ืช ืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื +-------------------+------------------------------ -------+--------------------------- | ืกื•ื’ ื ืขื™ืœื”| ืžืฆื‘| ืžืฉืš +---------------------+---------------------- ---+-- ------------------ | ืงืฉืจ| RowExclusiveLock| 51:11:10 | virtualxid| ื ืขื™ืœื” ื‘ืœืขื“ื™| 48:10:43 | ืขืกืงืื•ืช| ื ืขื™ืœื” ื‘ืœืขื“ื™| 44:24:53 | ืงืฉืจ| AccessShareLock| 20:06:13 | tuple| AccessExclusiveLock| 17:58:47 | tuple| ื ืขื™ืœื” ื‘ืœืขื“ื™| 01:40:41 | ืงืฉืจ| ShareUpdateExclusiveLock| 00:26:41 | ื—ืคืฅ| RowExclusiveLock| 00:00:01 | ืขืกืงืื•ืช| sharelock| 00:00:01 | ืœื”ืืจื™ืš| ื‘ืœืขื“ื™ ื ืขื™ืœื”| 00:00:01 +--------------------+---------------------------- -------+----------------------

ืžื™ื“ืข ืžืคื•ืจื˜ ืขื‘ื•ืจ ืฉืื™ืœืชื•ืช queryid ืกืคืฆื™ืคื™ื•ืช

ืžืžืชื™ืŸ ืœืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื ืœืคื™ QUERYID

ื‘ืงืฉื”

WITH
lt AS
(
	SELECT
		pid , 
		locktype  ,
		mode ,
		timepoint , 
		queryid , 
		blocking_pids ,
                MIN ( timepoint ) OVER (PARTITION BY pid , locktype  ,mode ) as started  
	FROM 
		activity_hist.archive_locking
	WHERE 
		timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND 
			                  pg_stat_history_end+(current_hour_diff * interval '1 hour') AND 
		NOT granted AND
	       queryid IS NOT NULL 
	GROUP BY 
	        pid , 
		locktype  ,
		mode ,
		timepoint ,
		queryid ,
		blocking_pids 
)
SELECT 
        lt.pid , 
	lt.locktype  ,
	lt.mode ,			
        lt.started ,
	lt.queryid  ,
	lt.blocking_pids ,
	COUNT(*)  * interval '1 second'	 as duration		
FROM lt 	
GROUP BY 
	lt.pid , 
        lt.locktype  ,
	lt.mode ,			
        lt.started ,
        lt.queryid ,
	lt.blocking_pids 
ORDER BY 4

ื“ื•ื’ืžื”

| ืžืžืชื™ืŸ ืœืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื ืœืคื™ QUERYID +---------+------------------------+----- ---------------+-------------------------------------+--- ------------------+---------------------+----------- - ---------- | pid| ืกื•ื’ ื ืขื™ืœื”| ืžืฆื‘| ื”ืชื—ื™ืœ| queryid| blocking_pids| ืžืฉืš +-----------+-------------------------+---------------- ----------+--------------------------------------+--------- ---+--------------------+----------------- --- | 11288| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213| ืขืกืงืื•ืช| sharelock| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10

ืœืงื™ื—ืช ืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื ืœืคื™ QUERYID

ื‘ืงืฉื”

WITH
lt AS
(
	SELECT
		pid , 
		locktype  ,
		mode ,
		timepoint , 
		queryid , 
		blocking_pids ,
                MIN ( timepoint ) OVER (PARTITION BY pid , locktype  ,mode ) as started  
	FROM 
		activity_hist.archive_locking
	WHERE 
		timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND 
			                  pg_stat_history_end+(current_hour_diff * interval '1 hour') AND 
		granted AND
		queryid IS NOT NULL 
	GROUP BY 
	        pid , 
		locktype  ,
		mode ,
		timepoint ,
		queryid ,
		blocking_pids 
)
SELECT 
        lt.pid , 
	lt.locktype  ,
	lt.mode ,			
        lt.started ,
	lt.queryid  ,
	lt.blocking_pids ,
	COUNT(*)  * interval '1 second'	 as duration			
FROM lt 	
GROUP BY 
	lt.pid , 
	lt.locktype  ,
	lt.mode ,			
        lt.started ,
	lt.queryid ,
	lt.blocking_pids 
ORDER BY 4

ื“ื•ื’ืžื”

| ื ื˜ื™ืœืช ืžื ืขื•ืœื™ื ืœืคื™ ืกื•ื’ื™ ืžื ืขื•ืœื™ื ืœืคื™ QUERYID +-----+------------------------+------ --------------+--------------------------------------+---- -+--------------------+---------------------------- | pid| ืกื•ื’ ื ืขื™ืœื”| ืžืฆื‘| ื”ืชื—ื™ืœ| queryid| blocking_pids| ืžืฉืš +-----------+-------------------------+---------------- ----------+--------------------------------------+--------- ---+--------------------+----------------- --- | 11288| ืงืฉืจ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092| ืขืกืงืื•ืช| ื‘ืœืขื“ื™ ื ืขื™ืœื”| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| ืงืฉืจ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092| ืงืฉืจ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11092| virtualxid| ื‘ืœืขื“ื™ ื ืขื™ืœื”| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| virtualxid| ื‘ืœืขื“ื™ ื ืขื™ืœื”| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| ืขืกืงืื•ืช| ื‘ืœืขื“ื™ ื ืขื™ืœื”| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| tuple| AccessExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34

ืฉื™ืžื•ืฉ ื‘ื”ื™ืกื˜ื•ืจื™ื™ืช ื—ืกื™ืžื” ื‘ืขืช ื ื™ืชื•ื— ืื™ืจื•ืขื™ ื‘ื™ืฆื•ืขื™ื.

  1. ืฉืื™ืœืชื” ืขื queryid=389015618226997618 ืฉื‘ื•ืฆืขื” ืขืœ ื™ื“ื™ ืชื”ืœื™ืš ืขื pid=11288 ืžืžืชื™ื ื” ืœื ืขื™ืœื” ืžืื– 2019-09-17 10:00:00 ืœืžืฉืš 3 ื“ืงื•ืช.
  2. ื”ืžื ืขื•ืœ ื”ื•ื—ื–ืง ืขืœ ื™ื“ื™ ืชื”ืœื™ืš ืขื pid=11092
  3. ืชื”ืœื™ืš ืขื pid=11092 ื‘ื™ืฆื•ืข ืฉืื™ืœืชื” ืขื queryid=389015618226997618 ืžืื– 2019-09-17 10:00:00 ื”ื—ื–ื™ืง ืืช ื”ื ืขื™ืœื” ืœืžืฉืš 3 ื“ืงื•ืช.

ืกืš ื”ื›ืœ

ื›ืขืช, ืื ื™ ืžืงื•ื•ื”, ื™ืชื—ื™ืœ ื”ื“ื‘ืจ ื”ืžืขื ื™ื™ืŸ ื•ื”ืฉื™ืžื•ืฉื™ ื‘ื™ื•ืชืจ - ืื™ืกื•ืฃ ืกื˜ื˜ื™ืกื˜ื™ืงื•ืช ื•ื ื™ืชื•ื— ืžืงืจื™ื ืขืœ ื”ื™ืกื˜ื•ืจื™ื™ืช ื”ืฆื™ืคื™ื•ืช ื•ื”ื—ืกื™ืžื”.

ื‘ืขืชื™ื“, ื”ื™ื™ืชื™ ืจื•ืฆื” ืœื”ืืžื™ืŸ, ืชืงื‘ืœื• ืกื˜ ืฉืœ ืคืชืง ื›ืœืฉื”ื• (ื‘ื“ื•ืžื” ืœืžื˜ืืœื™ื ืง ืฉืœ ืื•ืจืงืœ).

ื‘ืื•ืคืŸ ื›ืœืœื™, ืžืกื™ื‘ื” ื–ื• ื”ืžืชื•ื“ื•ืœื•ื’ื™ื” ื‘ื” ื ืขืฉื” ืฉื™ืžื•ืฉ ืžื•ืฆื’ืช ื‘ืžื”ื™ืจื•ืช ื”ืืคืฉืจื™ืช ืœืฆื•ืจืš ื”ื™ื›ืจื•ืช ืฆื™ื‘ื•ืจื™ืช.

ื‘ืขืชื™ื“ ื”ืงืจื•ื‘ ืžืื•ื“ ืื ืกื” ืœืฉื™ื ืืช ื”ืคืจื•ื™ืงื˜ ืขืœ github.

ืžืงื•ืจ: www.habr.com

ื”ื•ืกืคืช ืชื’ื•ื‘ื”