🥇 Daya daga cikin hanyoyin samun tarihin kullewa a cikin PostgreSQL

Cigaban labarin”Ƙoƙarin ƙirƙirar analog na ASH don PostgreSQL ".

Labarin zai bincika kuma ya nuna, ta amfani da takamaiman tambayoyi da misalai, waɗanne bayanai masu amfani za a iya samu ta amfani da tarihin pg_locks view.

Gargaɗi.
Saboda sabon sabon jigon da lokacin gwajin da ba a gama ba, labarin na iya ƙunshi kurakurai. Ana maraba da suka da sharhi sosai kuma ana tsammanin.

Bayanan shigarwa

Tarihin wakilcin pg_locks

Archive_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 
);

Ainihin, tebur yana kama da tebur archive_pg_stat_activity, an yi bayani dalla-dalla a nan - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? kuma a nan - Ƙoƙarin ƙirƙirar analog na ASH don PostgreSQL.

Don cika shafi tambaya ana amfani da aiki

sabunta_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;

Bayani: Ana sabunta ƙimar ginshiƙin queryid a cikin tebur ɗin tarihin_locking, sannan idan aka ƙirƙiri sabon bangare don tebirin kulle_kulle, ƙimar za a adana a cikin ƙimar tarihi.

Kayan aiki

Gabaɗaya bayanai akan matakai gabaɗaya.

JIRAN MAKULA TA RUBUTU

Nemi

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

Alal misali:

| JIRAN MULKI TA RUBUTU --------------------------------------+ ------------------ | locktype| yanayin| tsawon lokaci +-------------------------------------------------- --+-------------------- | ma'amala | ShareLock| 19:39:26 | tufa | AccessExclusiveLock| 00:03:35 +-------------------------------------------------- -----------------

DAUKAR KULLUN TA RUBUTU

Nemi

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

Alal misali:

| DAUKAR MULKI TA HANYAR KWALLIYA +---- -------------- | locktype| yanayin| tsawon lokaci +-------------------------------------------------- --+-------------------- | dangantaka| RowExclusiveLock| 51:11:10 | Virtualxid| ExclusiveLock| 48:10:43 | ma'amala | ExclusiveLock| 44:24:53 | dangantaka| AccessShareLock| 20:06:13 | tufa | AccessExclusiveLock| 17:58:47 | tufa | ExclusiveLock| 01:40:41 | dangantaka| ShareUpdateExclusiveLock| 00:26:41 | abu| RowExclusiveLock| 00:00:01 | ma'amala | ShareLock| 00:00:01 | mika | ExclusiveLock| 00:00:01 +-------------------------------------------------- -----------------

Cikakken bayani akan takamaiman buƙatun tambaya

JIRAN MULKI TA KYAUTA NA QUERYID

Nemi

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

Alal misali:

| JIRAN KULLE TA RUBUTU NA QUERYID +---------------------------------------- ------------------------- -------------------------- | pid | locktype| yanayin| fara| tambaya | blocking_pids| tsawon lokaci +----------------------- ------------------------ ------------------ --- | 11288| ma'amala | ShareLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626| ma'amala | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626| ma'amala | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626| ma'amala | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626| ma'amala | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629| ma'amala | ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629| ma'amala | ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| ma'amala | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| ma'amala | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| ma'amala | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213| ma'amala | ShareLock| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10

DAUKAR KULLE TA RUBUTU NA QUERYID

Nemi

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

Alal misali:

| DAUKAR KULLE TA RUBUTU NA QUERYID +------------------------ -------------- ----------------------------- | pid | locktype| yanayin| fara| tambaya | blocking_pids| tsawon lokaci +----------------------- ------------------------ ------------------ --- | 11288| dangantaka| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092| ma'amala | ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| dangantaka| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092| dangantaka| 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| ma'amala | ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| tufa | AccessExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34

Amfani da tarihin kulle don bincika abubuwan da suka faru.

Buƙatun tare da queryid=389015618226997618 wanda aka aiwatar ta hanyar tsari tare da pid=11288 yana jiran toshewa daga 2019-09-17 10:00:00 na mintuna 3.
An gudanar da kulle ta hanyar tsari tare da pid=11092
Tsari tare da pid=11092 aiwatar da buƙatu tare da queryid=389015618226997618 farawa daga 2019-09-17 10:00:00 ya riƙe kulle na mintuna 3.

Sakamakon

Yanzu, ina fata, ɓangaren mafi ban sha'awa da amfani zai fara - tattara ƙididdiga da nazarin lokuta akan tarihin jira da toshewa.

A nan gaba, ina so in yi imani, za mu sami saitin wasu bayanan kula (mai kama da Oracle's metalink).

Gabaɗaya, saboda haka ne aka ba da hanyar da aka yi amfani da ita ga kowa da sauri.

Zan yi ƙoƙarin buga aikin akan github nan gaba kaɗan.

source: www.habr.com

Ɗaya daga cikin hanyoyin samun tarihin kullewa a PostgreSQL

Bayanan shigarwa

Tarihin wakilcin pg_locks

Kayan aiki

JIRAN MAKULA TA RUBUTU

DAUKAR KULLUN TA RUBUTU

JIRAN MULKI TA KYAUTA NA QUERYID

DAUKAR KULLE TA RUBUTU NA QUERYID

Sakamakon

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