🥇 Ọkan ninu awọn ọna fun gbigba itan titiipa ni PostgreSQL

Ilọsiwaju nkan naa”Igbiyanju lati ṣẹda afọwọṣe ASH fun PostgreSQL ".

Nkan naa yoo ṣe ayẹwo ati ṣafihan, ni lilo awọn ibeere kan pato ati awọn apẹẹrẹ, kini alaye to wulo le ṣee gba nipa lilo itan-akọọlẹ ti wiwo pg_locks.

Ikilo
Nitori aratuntun ti koko ati akoko idanwo ti ko pari, nkan le ni awọn aṣiṣe ninu. Lodi ati comments ti wa ni strongly tewogba ati ki o ti ṣe yẹ.

Data igbewọle

Itan ti awọn aṣoju pg_locks

pamosi_locking

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 
);

Ni pataki, tabili jẹ iru si tabili pamosi_pg_stat_activity, ti ṣe apejuwe ni alaye diẹ sii nibi - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? ati nibi - Igbiyanju lati ṣẹda afọwọṣe ti ASH fun PostgreSQL.

Lati kun iwe kan ibeere iṣẹ ti lo

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;

Alaye: iye ti iwe queryid ti ni imudojuiwọn ninu tabili itan_locking, ati lẹhinna nigbati a ba ṣẹda ipin tuntun fun tabili pamosi_locking, iye naa yoo wa ni ipamọ sinu awọn iye itan.

Ijade

Alaye gbogbogbo lori awọn ilana ni apapọ.

Nduro fun awọn titiipa BY LOCKTYPES

Beere

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

Apeere:

| Nduro fun awọn titiipa NIPA TIPA TI AWỌN NIPA +------------------------------ ------------------ | locktype| mode| iye akoko +------------------- --+-------------------- | idunadura | ShareLock| 19:39:26 | tuple| AccessExclusiveLock| 00:03:35 +------------------------------ - -----------------

Gbigba awọn titiipa BY LOCKTYPES

Beere

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

Apeere:

| Gbigba awọn titiipa nipasẹ Awọn oriṣi titiipa +----------------------------- ------------------- | locktype| mode| iye akoko +------------------- --+-------------------- | ìbáṣepọ| RowExclusiveLock| 51:11:10 | virtualxid| ExclusiveLock| 48:10:43 | idunadura | ExclusiveLock| 44:24:53 | ìbáṣepọ| AccessShareLock| 20:06:13 | tuple| AccessExclusiveLock| 17:58:47 | tuple| ExclusiveLock| 01:40:41 | ìbáṣepọ| ShareUpdateExclusiveLock| 00:26:41 | nkan| RowExclusiveLock| 00:00:01 | idunadura | ShareLock| 00:00:01 | faagun| ExclusiveLock| 00:00:01 + --------------------------------------------------- - -----------------

Alaye ni kikun lori awọn ibeere ibeere ibeere kan pato

Nduro fun awọn titiipa NIPA LOCKTYPES nipasẹ QUERYID

Beere

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

Apeere:

| Nduro fun awọn titiipa NIPA TIPA TIPA NIPA QUERYID +---------------------------------------- ------------------------------------------ --------------------------------- | pid | locktype| mode| bere| queryid| blocking_pids| iye akoko +------------------- ---------------------------- ------------------ --- | 11288| idunadura | ShareLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626| idunadura | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626| idunadura | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626| idunadura | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626| idunadura | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629| idunadura | ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629| idunadura | ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| idunadura | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| idunadura | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| idunadura | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213| idunadura | ShareLock| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10

Gbigba awọn titiipa NIPA LOCKTYPES nipasẹ QUERYID

Beere

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

Apeere:

| GBIṢI TItiipa NIPA TIPA TIPA NIPA QUERYID +———————————————+ ----------------------- --------------------------- | pid | locktype| mode| bere| queryid| blocking_pids| iye akoko +------------------- -------------------------- ------------------ --- | 11288| ìbáṣepọ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092| idunadura | ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| ìbáṣepọ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092| ìbáṣepọ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11092| virtualxid| ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| virtualxid| ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| idunadura | ExclusiveLock| 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

Lilo itan titiipa lati ṣe itupalẹ awọn iṣẹlẹ iṣẹ.

Ibeere pẹlu queryid=389015618226997618 ti a ṣe nipasẹ ilana kan pẹlu pid=11288 nduro fun idinamọ ti o bẹrẹ lati 2019-09-17 10:00:00 fun awọn iṣẹju 3.
Titiipa naa wa ni idaduro nipasẹ ilana kan pẹlu pid=11092
Ilana kan pẹlu pid=11092 ṣiṣe ibeere kan pẹlu queryid=389015618226997618 ti o bẹrẹ lati 2019-09-17 10:00:00 di titiipa fun awọn iṣẹju 3.

Abajade

Bayi, Mo nireti, apakan ti o nifẹ julọ ati iwulo yoo bẹrẹ - ikojọpọ awọn iṣiro ati itupalẹ awọn ọran lori itan-akọọlẹ ti awọn iduro ati awọn idinamọ.

Ni ojo iwaju, Mo fẹ gbagbọ, a yoo gba ṣeto awọn akọsilẹ kan (bii si Oracle's metalink).

Ni gbogbogbo, o jẹ fun idi eyi ti ilana ti a lo ti wa fun gbogbo eniyan ni yarayara bi o ti ṣee.

Emi yoo gbiyanju lati firanṣẹ iṣẹ akanṣe lori github ni ọjọ iwaju nitosi.

orisun: www.habr.com

Ọkan ninu awọn ọna fun gbigba itan titiipa ni PostgreSQL

Data igbewọle

Itan ti awọn aṣoju pg_locks

Ijade

Nduro fun awọn titiipa BY LOCKTYPES

Gbigba awọn titiipa BY LOCKTYPES

Nduro fun awọn titiipa NIPA LOCKTYPES nipasẹ QUERYID

Gbigba awọn titiipa NIPA LOCKTYPES nipasẹ QUERYID

Abajade

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