ProHoster > Ibhulogi > Ulawulo > Umzamo wokudala i-ASH analogue ye-PostgreSQL

Umzamo wokudala i-ASH analogue ye-PostgreSQL

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Ukwandisa imibuzo yePostgreSQL, ukukwazi ukuhlalutya imbali yomsebenzi, ngokukodwa, ukulinda, ukutshixa, kunye neenkcukacha zetafile, zifuneka kakhulu.

Amathuba akhoyo

Isixhobo sokuHlalutya umthwalo woMsebenzi weMbali okanye "i-AWR yePostgres": isisombululo esinomdla kakhulu, kodwa akukho mbali ye-pg_stat_activity kunye ne-pg_locks.

pgsentinel ulwandiso :
«Lonke ulwazi oluqokelelweyo lugcinwa kuphela kwi-RAM, kwaye inani elisetyenzisiweyo lememori lilawulwa yinani leerekhodi ezigciniweyo zokugqibela.

Indawo ye-queryid yongezwa - umbuzo ofanayo ukusuka kulwandiso lwe-pg_stat_statements (ufakelo lwangaphambili luyafuneka).«

Oku, ewe, kuya kunceda kakhulu, kodwa eyona nto inzima linqaku lokuqala. ”Lonke ulwazi oluqokelelweyo lugcinwa kuphela kwi-RAM ”, i.e. kukho impembelelo kwisiseko ekujoliswe kuso. Ukongeza, akukho mbali yokutshixa kunye neenkcukacha zetafile. Ezo. isisombululo sithetha ngokungaphelelanga: “Akukabikho ipakethe esele yenziwe yofakelo okwangoku. Kuyacetyiswa ukuba ukhuphele imithombo kwaye udibanise ithala leencwadi ngokwakho. Okokuqala kufuneka ufake iphakheji "yophuhliso" yeseva yakho kwaye usete indlela eya kwi-pg_config kuluhlu lwe-PATH.".

Ngokubanzi, kukho ingxabano eninzi, kwaye kwimeko yeenkcukacha ezinzulu zokuvelisa, akunakwenzeka ukwenza nantoni na ngomncedisi. Kufuneka size nento eyethu kwakhona.

Isilumkiso

Ngenxa yomthamo omkhulu kwaye ngenxa yexesha elingaphelelanga lovavanyo, inqaku lenzelwe iinjongo zolwazi, endaweni yokuba yiseti yeethisisi kunye neziphumo eziphakathi.
Izinto ezineenkcukacha ezininzi ziya kulungiswa kamva, ngokweenxalenye

Idrafti yeemfuno zesisombululo

Kuyimfuneko ukuphuhlisa isixhobo esikuvumela ukuba ugcine:

pg_stat_imbali yokujonga umsebenzi
Imbali yokutshixa iseshoni usebenzisa imboniselo ye-pg_locks

Imfuno yesisombululo-ukunciphisa impembelelo kugcino lwedatha ekujoliswe kulo.

Ingcamango ngokubanzi- i-arhente yokuqokelela idatha iqaliswe kungekhona kwi-database ekujoliswe kuyo, kodwa kwi-database yokubeka iliso njengenkonzo ye-systemd. Ewe, enye ilahleko yedatha inokwenzeka, kodwa oku akubalulekanga ukunika ingxelo, kodwa akukho mpembelelo kwisiseko sedatha ekujoliswe kuyo ngokwememori kunye nendawo yediski. Kwaye kwimeko yokusebenzisa i-pool yokudibanisa, impembelelo kwiinkqubo zabasebenzisi incinci.

Amanqanaba okuphunyezwa

1.Iitafile zenkonzo

I-schema eyahlukileyo isetyenziselwa ukugcina iitheyibhile, ukwenzela ukuba kungabi nzima ukuhlalutya iitheyibhile eziphambili ezisetyenzisiweyo.

DROP SCHEMA IF EXISTS activity_hist ;
CREATE SCHEMA activity_hist AUTHORIZATION monitor ;

Kubalulekile: I-schema ayidalwanga kuvimba weenkcukacha ekujoliswe kuwo, kodwa kwisiseko sedatha yokubeka iliso.

pg_stat_imbali yokujonga umsebenzi

Itheyibhile isetyenziselwa ukugcina izifinyezo zangoku zemboniselo ye pg_stat_activity

umsebenzi_hist.history_pg_stat_umsebenzi :

--ACTIVITY_HIST.HISTORY_PG_STAT_ACTIVITY
DROP TABLE IF EXISTS activity_hist.history_pg_stat_activity;
CREATE TABLE activity_hist.history_pg_stat_activity
(
  timepoint timestamp without time zone ,
  datid             oid  , 
  datname           name ,
  pid               integer,
  usesysid          oid    ,
  usename           name   ,
  application_name  text   ,
  client_addr       inet   ,
  client_hostname   text   ,
  client_port       integer,
  backend_start     timestamp with time zone ,
  xact_start        timestamp with time zone ,
  query_start       timestamp with time zone ,
  state_change      timestamp with time zone ,
  wait_event_type   text ,                     
  wait_event        text ,                   
  state             text ,                  
  backend_xid       xid  ,                 
  backend_xmin      xid  ,                
  query             text ,               
  backend_type      text ,  
  queryid           bigint
);

Ukukhawulezisa ukufakwa - akukho indexes okanye izithintelo.

Ukugcina imbali ngokwayo, itheyibhile eyohluliweyo iyasetyenziswa:

umsebenzi_hist.archive_pg_stat_activity :

DROP TABLE IF EXISTS activity_hist.archive_pg_stat_activity;
CREATE TABLE activity_hist.archive_pg_stat_activity
(
  timepoint timestamp without time zone ,
  datid             oid  , 
  datname           name ,
  pid               integer,
  usesysid          oid    ,
  usename           name   ,
  application_name  text   ,
  client_addr       inet   ,
  client_hostname   text   ,
  client_port       integer,
  backend_start     timestamp with time zone ,
  xact_start        timestamp with time zone ,
  query_start       timestamp with time zone ,
  state_change      timestamp with time zone ,
  wait_event_type   text ,                     
  wait_event        text ,                   
  state             text ,                  
  backend_xid       xid  ,                 
  backend_xmin      xid  ,                
  query             text ,               
  backend_type      text ,
  queryid           bigint
)
PARTITION BY RANGE (timepoint);

Ekubeni kulo mzekelo akukho mfuneko yokufaka isantya, ezinye izalathisi zidalwe ukukhawulezisa ukudalwa kweengxelo.

Iseshini ivalela imbali

Itheyibhile isetyenziselwa ukugcina imifanekiso yangoku yezitshixo zeseshoni:

activity_hist.history_locking :

--ACTIVITY_HIST.HISTORY_LOCKING
DROP TABLE IF EXISTS activity_hist.history_locking;
CREATE TABLE activity_hist.history_locking
(
	timepoint timestamp without time zone ,
	locktype text ,
	relation oid ,
	mode text ,
	tid xid ,
	vtid text ,
	pid integer ,
	blocking_pids integer[] ,
	granted boolean
);

Kwakhona, ukukhawulezisa ukufakwa, akukho zikhombisi okanye izithintelo.

Ukugcina imbali ngokwayo, itheyibhile eyohluliweyo iyasetyenziswa:

umsebenzi_hist.archive_locking:

DROP TABLE IF EXISTS activity_hist.archive_locking;
CREATE TABLE activity_hist.archive_locking
(
	timepoint timestamp without time zone ,
	locktype text ,
	relation oid ,
	mode text ,
	tid xid ,
	vtid text ,
	pid integer ,
	blocking_pids integer[] ,
	granted boolean	
)
PARTITION BY RANGE (timepoint);

Ekubeni kulo mzekelo akukho mfuneko yokufaka isantya, ezinye izalathisi zidalwe ukukhawulezisa ukudalwa kweengxelo.

2.Ukugcwalisa imbali yangoku

Ukuqokelela ngokuthe ngqo izifinyezo zemboniselo, iscript ye-bash isetyenziswa eqhuba umsebenzi weplpgsql.

get_current_activity.sh

#!/bin/bash
#########################################################
#get_current_activity.sh

ERROR_FILE='/home/demon/get_current_activity'$(date +%Y%m%d-)'T'$(date +%H)$(date +%M)$(date +%S)
host=$1
s_name=$2
s_pass=$3

psql  -A -t -q -v ON_ERROR_STOP=1 -c "SELECT activity_hist.get_current_activity( '$host' , '$s_name' , '$s_pass' )" >/dev/null 2>$ERROR_FILE

line_count=`cat $ERROR_FILE | wc -l`
if [[ $line_count != '0' ]];
then
    rm -f /home/demon/*.err >/dev/null 2>/dev/null
	cp $ERROR_FILE $ERROR_FILE'.err' >/dev/null 2>/dev/null  
fi
rm $ERROR_FILE >/dev/null 2>/dev/null
exit 0

plpgsql Umsebenzi we-dblink ufikelela kwiimbono kuvimba wedatha ekujoliswe kuwo kwaye ufaka imiqolo kwiitheyibhile zenkonzo kuvimba weenkcukacha wokubeka iliso.

get_current_activity.sql

CREATE OR REPLACE FUNCTION activity_hist.get_current_activity( current_host text , current_s_name text , current_s_pass text ) RETURNS BOOLEAN AS $$
DECLARE 
  database_rec record;
  dblink_str text ;
BEGIN   

	EXECUTE 'SELECT dblink_connect(''LINK1'',''host='||current_host||' port=5432 dbname=postgres'||
	                                         ' user='||current_s_name||' password='||current_s_pass|| ' '')';



--------------------------------------------------------------------
--GET pg_stat_activity stats
	INSERT INTO activity_hist.history_pg_stat_activity
	(
		SELECT * FROM dblink('LINK1',
			'SELECT 
			now() , 
			datid             , 
			datname           ,
			pid               ,
			usesysid              ,
			usename              ,
			application_name     ,
			client_addr          ,
			client_hostname      ,
			client_port       ,
			backend_start         ,
			xact_start            ,
			query_start           ,
			state_change          ,
			wait_event_type    ,                     
			wait_event         ,                   
			state              ,                  
			backend_xid         ,                 
			backend_xmin        ,                
			query              ,               
			backend_type   			
		FROM pg_stat_activity
		') 
		AS t (
		    timepoint 		  timestamp without time zone ,			
			datid             oid  , 
			datname           name ,
			pid               integer,
			usesysid          oid    ,
			usename           name   ,
			application_name  text   ,
			client_addr       inet   ,
			client_hostname   text   ,
			client_port       integer,
			backend_start     timestamp with time zone ,
			xact_start        timestamp with time zone ,
			query_start       timestamp with time zone ,
			state_change      timestamp with time zone ,
			wait_event_type   text ,                     
			wait_event        text ,                   
			state             text ,                  
			backend_xid       xid  ,                 
			backend_xmin      xid  ,                
			query             text ,               
			backend_type      text 			
		)
	);

---------------------------------------	
--ACTIVITY_HIST.HISTORY_LOCKING	
	INSERT INTO activity_hist.history_locking
	(
		SELECT * FROM dblink('LINK1',
			'SELECT 
			now() , 
			lock.locktype,
			lock.relation,
			lock.mode,
			lock.transactionid as tid,
			lock.virtualtransaction as vtid,
			lock.pid,
			pg_blocking_pids(lock.pid), 
			lock.granted
			FROM 	pg_catalog.pg_locks lock LEFT JOIN pg_catalog.pg_database db ON db.oid = lock.database
			WHERE NOT lock.pid = pg_backend_pid()	
		') 
		AS t (
			timepoint timestamp without time zone ,
			locktype text ,
			relation oid , 
			mode text ,
			tid xid ,
			vtid text ,
			pid integer ,
			blocking_pids integer[] ,
			granted boolean
		)
	);
	PERFORM dblink_disconnect('LINK1');
	
	RETURN TRUE ;
END
$$ LANGUAGE plpgsql;

Ukuqokelela imifanekiso yokujonga, inkonzo yenkqubo kunye nezikripthi ezimbini zisetyenziswa:

pg_current_activity.service

# /etc/systemd/system/pg_current_activity.service
[Unit]
Description=Collect history of pg_stat_activity , pg_locks 
Wants=pg_current_activity.timer

[Service]
Type=forking
StartLimitIntervalSec=0
ExecStart=/home/postgres/pgutils/demon/get_current_activity.sh 10.124.70.40 postgres postgres

[Install]
WantedBy=multi-user.target

pg_current_activity.timer

# /etc/systemd/system/pg_current_activity.timer
[Unit]
Description=Run pg_current_activity.sh every 1 second
Requires=pg_current_activity.service

[Timer]
Unit=pg_current_activity.service
OnCalendar=*:*:0/1
AccuracySec=1

[Install]
WantedBy=timers.target

Yabela amalungelo kwizikripthi:
# chmod 755 pg_current_activity.timer
# chmod 755 pg_current_activity.service

Masiqale inkonzo:
# systemctl daemon-kwakhona kwakhona
# systemctl qala pg_current_activity.service

Ngaloo ndlela, imbali yeembono iqokelelwa ngendlela ye-snapshots yesibini-yesibini. Ewe kunjalo, ukuba yonke into ishiywe njengoko injalo, iitafile ziya kukhula ngokukhawuleza ubungakanani kwaye umsebenzi ongaphezulu okanye ongaphantsi wokuvelisa uya kuba ungenakwenzeka.

Kuyimfuneko ukuququzelela ukugcinwa kwedatha.

3. Ukugcinwa kwembali

Ukugcina, iitheyibhile ezahluliweyo zisetyenziswa.

Izahlulo ezitsha zenziwe ngeyure nganye, ngelixa idatha endala isusiwe kwimbali* iitafile, ngoko ke ubungakanani beetafile zembali* abutshintshi kakhulu kwaye isantya sofakelo asithobi ekuhambeni kwexesha.

Ukwenziwa kwamacandelo amatsha kwenziwa ngumsebenzi we-plpgsql_hist.archive_current_activity. I-algorithm yomsebenzi ilula kakhulu (usebenzisa umzekelo wecandelo le-archive_pg_stat_activity table).

Yenza kwaye ugcwalise icandelo elitsha

EXECUTE format(
'CREATE TABLE ' || partition_name || 
' PARTITION OF activity_hist.archive_pg_stat_activity FOR VALUES FROM ( %L ) TO ( %L ) ' , 
to_char(date_trunc('year', partition_min_range ),'YYYY')||'-'||
to_char(date_trunc('month', partition_min_range ),'MM')||'-'||
to_char(date_trunc('day', partition_min_range ),'DD')||' '||
to_char(date_trunc('hour', partition_min_range ),'HH24')||':00', 
to_char(date_trunc('year', partition_max_range ),'YYYY')||'-'||
to_char(date_trunc('month', partition_max_range ),'MM')||'-'||
to_char(date_trunc('day', partition_max_range ),'DD')||' '||
to_char(date_trunc('hour', partition_max_range ),'HH24')||':00'
);

INSERT INTO activity_hist.archive_pg_stat_activity
(
	SELECT 	* 
	FROM 	activity_hist.history_pg_stat_activity
	WHERE 	timepoint BETWEEN partition_min_range AND partition_max_range 		
);

Ukudala izalathisi

EXECUTE format	(
'CREATE INDEX '||index_name||
' ON '||partition_name||' ( wait_event_type , backend_type , timepoint )' 
);

EXECUTE format	('CREATE INDEX '||index_name||
' ON '||partition_name||' ( wait_event_type , backend_type , timepoint , queryid )' 
);

Ukususa idatha endala kwi-history_pg_stat_activity table

DELETE 
FROM 	activity_hist.history_pg_stat_activity
WHERE 	timepoint < partition_max_range;

Ewe, amaxesha ngamaxesha, amacandelo amadala ayacinywa njengengeyomfuneko.

Iingxelo ezisisiseko

Eneneni, kutheni kusenziwa konke oku? Ukufumana iingxelo ngokungacacanga okukhumbuza i-Oracle's AWR.

Kubalulekile ukongeza ukuba ukuze ufumane iingxelo, kufuneka wakhe uxhulumaniso phakathi kwe pg_stat_activity kunye nemibono ye-pg_stat_statements. Iitheyibhile zidityaniswe ngokongeza u-'queryid' ikholamu kwi-'history_pg_stat_activity', 'archive_pg_stat_activity'. Indlela yokongeza ixabiso lekholomu ingaphaya kobubanzi beli nqaku kwaye ichazwe apha - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? .

LIWONKE IXESHA LE-CPU LEMIBUZO

Isicelo :

WITH hist AS
(
SELECT 
	aa.query ,aa.queryid ,			
	count(*) * interval '1 second' AS duration 
FROM 	activity_hist.archive_pg_stat_activity aa
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 backend_type = 'client backend' AND datname != 'postgres' AND	( aa.wait_event_type IS NULL  ) ANDaa.state = 'active'
GROUP BY aa.wait_event_type , aa.wait_event , aa.query ,aa.queryid		
UNION 
SELECT 
	ha.query ,ha.queryid,
	count(*) * interval '1 second' AS duration 
FROM 	activity_hist.history_pg_stat_activity_for_reports ha
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 	backend_type = 'client backend' AND datname != 'postgres' AND ( ha.wait_event_type IS NULL  )AND ha.state = 'active'
GROUP BY ha.wait_event_type , ha.wait_event , ha.query ,ha.queryid		
)
SELECT 	query , queryid , SUM( duration ) as duration 
FROM hist
GROUP BY  query , queryid 
ORDER BY 3 DESC

Umzekelo:

-------------------------------------------------------------------
| TOTAL CPU TIME FOR QUERIES : 07:47:36
+----+----------------------------------------+--------------------
|   #|                                 queryid|            duration
+----+----------------------------------------+--------------------
|   1|                      389015618226997618|            04:28:58
|   2|                                        |            01:07:29
|   3|                     1237430309438971376|            00:59:38
|   4|                     4710212362688288619|            00:50:48
|   5|                       28942442626229688|            00:15:50
|   6|                     9150846928388977274|            00:04:46
|   7|                    -6572922443698419129|            00:00:06
|   8|                                        |            00:00:01
+----+----------------------------------------+--------------------

IXESHA LONKE LOKULINDA NGEMIBUZO

Isicelo :

WITH hist AS
(
SELECT 
	aa.query ,aa.queryid ,			
	count(*) * interval '1 second' AS duration 
FROM 	activity_hist.archive_pg_stat_activity aa
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 
	backend_type = 'client backend' AND datname != 'postgres' AND
	( aa.wait_event_type IS NOT NULL  ) 
GROUP BY aa.wait_event_type , aa.wait_event , aa.query ,aa.queryid		
UNION 
SELECT 
	ha.query ,ha.queryid,
	count(*) * interval '1 second' AS duration 
FROM 	activity_hist.history_pg_stat_activity_for_reports ha
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 
	backend_type = 'client backend' AND datname != 'postgres' AND				
	( ha.wait_event_type IS NOT NULL  )
GROUP BY ha.wait_event_type , ha.wait_event , ha.query ,ha.queryid		
)
SELECT 	query , queryid , SUM( duration ) as duration 
FROM hist
GROUP BY  query , queryid 
ORDER BY 3 DESC

Umzekelo:

-------------------------------------------------------------------
| TOTAL WAITINGS TIME FOR QUERIES : 21:55:04
+----+----------------------------------------+--------------------
|   #|                                 queryid|            duration
+----+----------------------------------------+--------------------
|   1|                      389015618226997618|            16:19:05
|   2|                                        |            03:47:04
|   3|                     8085340880788646241|            00:40:20
|   4|                     4710212362688288619|            00:13:35
|   5|                     9150846928388977274|            00:12:25
|   6|                       28942442626229688|            00:11:32
|   7|                     1237430309438971376|            00:09:45
|   8|                     2649515222348904837|            00:09:37
|   9|                                        |            00:03:45
|  10|                     3167065002719415275|            00:02:20
|  11|                     5731212217001535134|            00:02:13
|  12|                     8304755792398128062|            00:01:31
|  13|                     2649515222348904837|            00:00:59
|  14|                     2649515222348904837|            00:00:22
|  15|                                        |            00:00:12
|  16|                     3422818749220588372|            00:00:08
|  17|                    -5730801771815999400|            00:00:03
|  18|                    -1473395109729441239|            00:00:02
|  19|                     2404820632950544954|            00:00:02
|  20|                    -6572922443698419129|            00:00:02
|  21|                     2369289265278398647|            00:00:01
|  22|                      180077086776069052|            00:00:01
+----+----------------------------------------+--------------------

UKULINDA IMIBUZO

Izicelo:

WITH hist AS
(
SELECT 
	aa.wait_event_type , aa.wait_event 
FROM 	activity_hist.archive_pg_stat_activity aa
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 
	backend_type = 'client backend' AND datname != 'postgres' AND
	aa.wait_event IS NOT NULL 
GROUP BY aa.wait_event_type , aa.wait_event
UNION 
SELECT 
	ha.wait_event_type , ha.wait_event 
FROM 	activity_hist.history_pg_stat_activity_for_reports ha
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 
	backend_type = 'client backend' AND datname != 'postgres' AND
	ha.wait_event IS NOT NULL 
GROUP BY ha.wait_event_type , ha.wait_event		
)
SELECT 	wait_event_type , wait_event 
FROM hist
GROUP BY wait_event_type , wait_event
ORDER BY 1 ASC,2 ASC

----------------------------------------------------------------------

WITH hist AS
(
SELECT 
	aa.wait_event_type , aa.wait_event , aa.query ,aa.queryid ,			
	count(*) * interval '1 second' AS duration 
FROM 	activity_hist.archive_pg_stat_activity aa
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 
	backend_type = 'client backend' AND datname != 'postgres' AND
	( aa.wait_event_type = waitings_stat_rec.wait_event_type AND aa.wait_event = waitings_stat_rec.wait_event )
GROUP BY aa.wait_event_type , aa.wait_event , aa.query ,aa.queryid		
UNION 
SELECT 
	ha.wait_event_type , ha.wait_event , ha.query ,ha.queryid,
	count(*) * interval '1 second' AS duration 
FROM 	activity_hist.history_pg_stat_activity_for_reports ha
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 
	backend_type = 'client backend' AND datname != 'postgres' AND				
	( ha.wait_event_type = waitings_stat_rec.wait_event_type AND ha.wait_event = waitings_stat_rec.wait_event )
GROUP BY ha.wait_event_type , ha.wait_event , ha.query ,ha.queryid		
)
SELECT 	query , queryid , SUM( duration ) as duration 
FROM hist
GROUP BY  query , queryid 
ORDER BY 3 DESC

Umzekelo:

------------------------------------------------
| WAITINGS FOR QUERIES
+-----------------------------------------------
|                      wait_event_type = Client|
|                       wait_event = ClientRead|
|                        Total time  = 00:46:56|
------------------------------------------------
|    #|             queryid|            duration
+-----+--------------------+--------------------
|    1| 8085340880788646241|            00:40:20
|    2|                    |            00:03:45
|    3| 5731212217001535134|            00:01:53
|    4|                    |            00:00:12
|    5| 9150846928388977274|            00:00:09
|    6| 3422818749220588372|            00:00:08
|    7| 1237430309438971376|            00:00:06
|    8|   28942442626229688|            00:00:05
|    9| 4710212362688288619|            00:00:05
|   10|-5730801771815999400|            00:00:03
|   11| 8304755792398128062|            00:00:02
|   12|-6572922443698419129|            00:00:02
|   13|-1473395109729441239|            00:00:02
|   14| 2404820632950544954|            00:00:02
|   15|  180077086776069052|            00:00:01
|   16| 2369289265278398647|            00:00:01

+-----------------------------------------------
|                          wait_event_type = IO|
|                      wait_event = BufFileRead|
|                        Total time  = 00:00:38|
------------------------------------------------
|    #|             queryid|            duration
+-----+--------------------+--------------------
|    1|   28942442626229688|            00:00:38

+-----------------------------------------------

IINKQUBO EZITSHINWEYO IMBALI

Isicelo:

SELECT 
MIN(date_trunc('second',timepoint)) AS started , 
	count(*) * interval '1 second' as duration ,
	pid , blocking_pids , relation , mode , locktype 	 
FROM 
	activity_hist.archive_locking al 
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 
	locktype = 'relation' 
GROUP BY pid , blocking_pids , relation , mode , locktype			
UNION
SELECT 
	MIN(date_trunc('second',timepoint)) AS started , 
	count(*) * interval '1 second' as duration ,
	pid , blocking_pids , relation , mode , locktype
FROM 
	activity_hist.history_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 
	locktype = 'relation' 
GROUP BY pid , blocking_pids , relation , mode , locktype			
ORDER BY 1

Umzekelo:

------------------------------------------------- ------------------------------------------------- ---------------------------------- | IMBALI YEENKQUBO EZItshixiweyo +-----+----------------------------------------- --------+-------------------+--------------------------- +-------------------- | #| ipid| iqalile| ixesha| blocking_pids| ubudlelwane| indlela| isitshixo +---------------------------------------- +--------- ------------------------------- -------------------- --------------- | 1| 26224 | 2019-09-02 19:32:16 | 00:01:45 | {26211} | 16541 | AccessShareLock| ubudlelwane | 2 | 26390 | 2019-09-02 19:34:03 | 00:00:53 | {26211} | 16541 | AccessShareLock| ubudlelwane | 3| 26391 | 2019-09-02 19:34:03 | 00:00:53 | {26211} | 16541 | AccessShareLock| ubudlelwane | 4 | 26531 | 2019-09-02 19:35:27 | 00:00:12 | {26211} | 16541 | AccessShareLock| ubudlelwane | 5 | 27284 | 2019-09-02 19:44:02 | 00:00:19 | {27276} | 16541 | AccessShareLock| ubudlelwane | 6 | 27283 | 2019-09-02 19:44:02 | 00:00:19 | {27276} | 16541 | AccessShareLock| ubudlelwane | 7| 27286 | 2019-09-02 19:44:02 | 00:00:19 | {27276} | 16541 | AccessShareLock| ubudlelwane | 8| 27423 | 2019-09-02 19:45:24 | 00:00:12 | {27394} | 16541 | AccessShareLock| ubudlelwane | 9 | 27648 | 2019-09-02 19:48:06 | 00:00:20 | {27647} | 16541 | AccessShareLock| ubudlelwane | 10 | 27650 | 2019-09-02 19:48:06 | 00:00:20 | {27647} | 16541 | AccessShareLock| ubudlelwane | 11 | 27735 | 2019-09-02 19:49:08 | 00:00:06 | {27650} | 16541 | AccessExclusiveLock| ubudlelwane | 12 | 28380 | 2019-09-02 19:56:03 | 00:01:56 | {28379} | 16541 | AccessShareLock| ubudlelwane | 13 | 28379 | 2019-09-02 19:56:03 | 00:00:01 | 28377 | 16541 | AccessExclusiveLock| ubudlelwane | | | | | 28376 | |

UKUVALWA KWEENKQUBO ZEMBALI

Izicelo:

SELECT 
blocking_pids 
FROM 
	activity_hist.archive_locking al 
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 
	locktype = 'relation' 
GROUP BY blocking_pids 		
UNION
SELECT 
	blocking_pids 
FROM 
	activity_hist.history_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 
	locktype = 'relation' 
GROUP BY blocking_pids 		
ORDER BY 1

---------------------------------------------------------------

SELECT 
	pid , usename , application_name , datname ,
	MIN(date_trunc('second',timepoint)) as started , 
	count(*) * interval '1 second' as duration ,		 
	state , 
	query
				FROM  	activity_hist.archive_pg_stat_activity
				WHERE 	pid= current_pid AND 
						timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') 						 
				GROUP BY pid , usename , application_name , 
						datname , 
						state_change, 
						state , 
						query 
				UNION
				SELECT 
					pid , usename , application_name , datname ,
					MIN(date_trunc('second',timepoint)) as started , 
					count(*) * interval '1 second' as duration ,		 
					state , 
					query
				FROM  	activity_hist.history_pg_stat_activity_for_reports
				WHERE 	pid= current_pid AND 
						timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') 						 
				GROUP BY pid , usename , application_name , 
						datname , 
						state_change, 
						state , 
						query 
				ORDER BY 5 , 1

Umzekelo:

------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ------------------------------------------------------------------------------------------------- -------------------------------------------------- ------+------------------------------------------ - -------+--------------------------------------- | #| ipid| igama lomsebenzisi| isicelo_igama| igama | iqalile| ixesha| ilizwe| umbuzo +----------+---------+----------+-----+ --------- ------------------------------------------------- ------------------------------------------- ------- ------------------ | 1| 26211 | umntu | psql| tdb1| 2019-09-02 19:31:54 | 00:00:04 | ungasebenzi | | 2 | 26211 | umntu | psql| tdb1| 2019-09-02 19:31:58 | 00:00:06 | ungenzi nto kwintengiselwano| qala; | 3| 26211 | umntu | psql| tdb1| 2019-09-02 19:32:16 | 00:01:45 | ungenzi nto kwintengiselwano| idatha yetafile yokutshixa; | 4 | 26211 | umntu | psql| tdb1| 2019-09-02 19:35:54 | 00:01:23 | ungasebenzi | zibophelele; | 5 | 26211 | umntu | psql| tdb1| 2019-09-02 19:38:46 | 00:00:02 | ungenzi nto kwintengiselwano| qala; | 6 | 26211 | umntu | psql| tdb1| 2019-09-02 19:38:54 | 00:00:08 | ungenzi nto kwintengiselwano| idatha yetafile yokutshixa; | 7| 26211 | umntu | psql| tdb1| 2019-09-02 19:39:08 | 00:42:42 | ungasebenzi | zibophelele; | 8| 26211 | umntu | psql| tdb1| 2019-09-03 07:12:07 | 00:00:52 | esebenzayo| khetha test_del();

Uphuhliso.

Imibuzo esisiseko ebonisiweyo kunye neengxelo ezifunyenweyo sele zenza ubomi bube lula xa kuhlalutywa izehlo zokusebenza.
Ngokusekwe kwimibuzo esisiseko, unokufumana ingxelo efana nqwa ne-Oracle's AWR.
Umzekelo wengxelo yesishwankathelo

+------------------------------------------------ ----------------------------------- | INGXELO EHLANGANISIWEYO YOMSEBENZI NOKLINDISA.

Iza kuqhubeka. Okulandelayo kumgca kukwenziwa kwembali yokutshixa (pg_stat_locks), inkcazo ethe kratya yenkqubo yokuzalisa iitafile.

umthombo: www.habr.com

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