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PostgreSQL لاءِ ASH اينالاگ ٺاهڻ جي ڪوشش

مسئلو جي ترتيب

PostgreSQL سوالن کي بهتر ڪرڻ لاءِ، سرگرمي جي تاريخ جو تجزيو ڪرڻ جي صلاحيت، خاص طور تي، انتظار، لاڪ، ۽ ٽيبل جا انگ اکر، تمام ضروري آهن.

دستياب موقعا

تاريخي ڪم لوڊ تجزيي جو اوزار يا "AWR پوسٽ گريس لاء": هڪ تمام دلچسپ حل، پر pg_stat_activity ۽ pg_locks جي ڪا به تاريخ ناهي.

pgsentinel واڌارو :
«سموري جمع ڪيل معلومات صرف رام ۾ محفوظ ڪئي وئي آهي، ۽ ميموري جي استعمال ڪيل رقم آخري ذخيرو رڪارڊ جي تعداد جي ذريعي منظم ڪئي وئي آهي.

queryid فيلڊ شامل ڪيو ويو آهي - ساڳيو queryid pg_stat_statements ايڪسٽينشن کان (پري انسٽاليشن گهربل).«

اهو، يقينا، تمام گهڻو مدد ڪندو، پر سڀ کان وڌيڪ ڏکوئيندڙ شيء پهريون نقطو آهي.سموري معلومات صرف رام ۾ محفوظ ٿيل آهي ”، يعني ھدف جي بنياد تي ھڪڙو اثر آھي. ان کان علاوه، ڪو به تالا تاريخ ۽ ٽيبل جي انگ اکر نه آهي. اهي. حل عام طور تي ناممڪن آهي: "انسٽاليشن لاءِ اڃا تائين ڪو به تيار ٿيل پيڪيج ناهي. اهو تجويز ڪيل آهي ته ذريعن کي ڊائون لوڊ ڪريو ۽ لائبريري پاڻ کي گڏ ڪريو. توهان کي پهريان توهان جي سرور لاءِ “devel” پيڪيج انسٽال ڪرڻ جي ضرورت آهي ۽ PATH متغير ۾ pg_config ڏانهن رستو مقرر ڪريو.".

عام طور تي، اتي تمام گهڻو پريشان آهي، ۽ سنجيده پيداوار ڊيٽابيس جي صورت ۾، اهو سرور سان ڪجهه ڪرڻ ممڪن ناهي. اسان کي ٻيهر پنهنجي پاڻ سان گڏ اچڻ جي ضرورت آهي.

ڊيڄاريندڙ.

بلڪه وڏي مقدار جي ڪري ۽ نامڪمل جاچ واري دور جي ڪري، مضمون بنيادي طور تي معلوماتي نوعيت جو آهي، بلڪه ٿيسز ۽ وچولي نتيجن جي هڪ سيٽ جي طور تي.
وڌيڪ تفصيلي مواد بعد ۾ تيار ڪيو ويندو، حصن ۾

حل جي ضرورتن جو مسودو

اهو ضروري آهي ته هڪ اوزار ٺاهيو جيڪو توهان کي ذخيرو ڪرڻ جي اجازت ڏئي ٿو:

pg_stat_activity ڏسڻ جي تاريخ
سيشن تالا جي تاريخ استعمال ڪندي pg_locks ڏيک

حل جي گهرج- ٽارگيٽ ڊيٽابيس تي اثر گھٽايو.

عام خيال- ڊيٽا گڏ ڪرڻ وارو ايجنٽ ٽارگيٽ ڊيٽابيس ۾ نه، پر مانيٽرنگ ڊيٽابيس ۾ هڪ سسٽم سروس جي طور تي شروع ڪيو ويو آهي. ها، ڪجهه ڊيٽا نقصان ممڪن آهي، پر اهو رپورٽنگ لاء اهم ناهي، پر ميموري ۽ ڊسڪ اسپيس جي لحاظ کان ٽارگيٽ ڊيٽابيس تي ڪو به اثر نه آهي. ۽ ڪنيڪشن پول استعمال ڪرڻ جي صورت ۾، صارف جي عمل تي اثر گهٽ ۾ گهٽ آهي.

لاڳو ڪرڻ جا مرحلا

1.Service ٽيبل

جدولن کي ذخيرو ڪرڻ لاءِ هڪ الڳ اسڪيما استعمال ڪيو ويندو آهي، جيئن استعمال ٿيل مکيه جدولن جي تجزيي کي پيچيده نه ڪجي.

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

اھم: اسڪيما ھدف واري ڊيٽابيس ۾ پيدا نه ڪئي وئي آھي، پر مانيٽرنگ ڊيٽابيس ۾.

pg_stat_activity ڏسڻ جي تاريخ

pg_stat_activity view جي موجوده تصويرن کي ذخيرو ڪرڻ لاءِ ٽيبل استعمال ڪيو ويندو آهي

activity_hist.history_pg_stat_activity :

--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
);

داخل ڪرڻ کي تيز ڪرڻ لاءِ - ڪا به انڊيڪس يا پابنديون.

تاريخ پاڻ کي ذخيرو ڪرڻ لاء، هڪ ورهاڱي واري ٽيبل استعمال ڪيو ويندو آهي:

activity_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);

جيئن ته هن معاملي ۾ داخل ڪرڻ جي رفتار لاء ڪا ضرورت ناهي، ڪجهه انڊيڪس ٺاهيا ويا آهن رپورٽون ٺاهڻ جي رفتار کي تيز ڪرڻ لاء.

سيشن بلاڪ ڪرڻ جي تاريخ

سيشن لاڪ جي موجوده تصويرن کي ذخيرو ڪرڻ لاءِ ٽيبل استعمال ڪيو ويندو آهي:

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
);

انهي سان گڏ، اندراج کي تيز ڪرڻ لاء، ڪو به انڊيڪس يا پابنديون نه آهن.

تاريخ پاڻ کي ذخيرو ڪرڻ لاء، هڪ ورهاڱي واري ٽيبل استعمال ڪيو ويندو آهي:

activity_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);

جيئن ته هن معاملي ۾ داخل ڪرڻ جي رفتار لاء ڪا ضرورت ناهي، ڪجهه انڊيڪس ٺاهيا ويا آهن رپورٽون ٺاهڻ جي رفتار کي تيز ڪرڻ لاء.

2. موجوده تاريخ کي ڀرڻ

سڌو سنئون سنيپ شاٽ گڏ ڪرڻ لاء، هڪ بش اسڪرپٽ استعمال ڪيو ويندو آهي جيڪو هلائي ٿو plpgsql فنڪشن.

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 dblink فنڪشن ٽارگيٽ ڊيٽابيس ۾ نظرن تائين رسائي ڪري ٿو ۽ مانيٽرنگ ڊيٽابيس ۾ سروس جدولن ۾ قطار داخل ڪري ٿو.

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;

ڏسڻ جي تصويرن کي گڏ ڪرڻ لاء، سسٽم ڊي سروس ۽ ٻه اسڪرپٽ استعمال ڪيا ويا آهن:

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

لکت جا حق مقرر ڪريو:
# chmod 755 pg_current_activity.timer
# chmod 755 pg_current_activity.service

اچو ته خدمت شروع ڪريون:
# سسٽمڪٽر دايم-ٻيهر لوڊ
# systemctl start pg_current_activity.service

اهڙيءَ طرح، نظرن جي تاريخ کي گڏ ڪيو ويندو آهي سيڪنڊ-جي-سيڪنڊ تصويرن جي صورت ۾. يقينن، جيڪڏهن سڀ ڪجهه ڇڏي ويو آهي، جدول تمام جلدي سائيز ۾ وڌندا ۽ گهٽ يا گهٽ پيداوار وارو ڪم ناممڪن ٿي ويندو.

ڊيٽا آرڪائيو کي منظم ڪرڻ ضروري آهي.

3. آرڪائيو تاريخ

آرڪائيو ڪرڻ لاء، ورهاڱي واري جدول آرڪائيو * استعمال ٿيل آهن.

نيون ورهاڱي هر ڪلاڪ ٺاهيا ويندا آهن، جڏهن ته پراڻي ڊيٽا کي هٽايو ويندو آهي تاريخ * جدولن مان، تنهنڪري تاريخ * جدولن جو سائز گهڻو تبديل نه ٿيندو آهي ۽ وقت سان گڏ داخل ڪرڻ جي رفتار خراب نه ٿيندي آهي.

نون حصن جي تخليق plpgsql فنڪشن جي ذريعي ڪئي وئي آهي activity_hist.archive_current_activity. ڪم جو الگورتھم بلڪل سادو آھي (آرڪائيو_pg_stat_activity ٽيبل لاءِ سيڪشن جو مثال استعمال ڪندي).

نئون سيڪشن ٺاهيو ۽ ڀريو

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 		
);

انڊيڪس ٺاهڻ

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 )' 
);

تاريخ_pg_stat_activity ٽيبل مان پراڻي ڊيٽا کي هٽائڻ

DELETE 
FROM 	activity_hist.history_pg_stat_activity
WHERE 	timepoint < partition_max_range;

يقينن، وقت بوقت، پراڻن حصن کي غير ضروري طور ختم ڪيو وڃي ٿو.

بنيادي رپورٽون

دراصل اهو سڀ ڪجهه ڇو ڪيو پيو وڃي؟ رپورٽون حاصل ڪرڻ لاءِ تمام مبہم طور تي Oracle's AWR جي ياد ڏياريندڙ.

اهو شامل ڪرڻ ضروري آهي ته رپورٽون حاصل ڪرڻ لاء، توهان کي pg_stat_activity ۽ pg_stat_statements نظرين جي وچ ۾ هڪ ڪنيڪشن ٺاهڻ جي ضرورت آهي. جدولن کي ڳنڍيو ويو آهي 'queryid' ڪالمن کي شامل ڪرڻ سان 'history_pg_stat_activity'، 'archive_pg_stat_activity' جدولن ۾. ڪالمن جي قيمت شامل ڪرڻ جو طريقو هن مضمون جي دائري کان ٻاهر آهي ۽ هتي بيان ڪيو ويو آهي - pg_stat_statements + pg_stat_activity + loq_query = pg_ash؟ .

سوالن لاءِ TOTAL CPU وقت

درخواست:

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

مثال طور

-------------------------------------------------------------------
| 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
+----+----------------------------------------+--------------------

سوالن لاءِ کل انتظار جو وقت

درخواست:

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

مثال طور

-------------------------------------------------------------------
| 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
+----+----------------------------------------+--------------------

سوالن جي انتظار ۾

درخواستون:

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

مثال طور

------------------------------------------------
| 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

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

بند ٿيل عمل جي تاريخ

درخواست:

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

مثال طور

----------------------------------- ----------------------------------- ----------------------------------- | بند ٿيل عمل جي تاريخ +------+------------+------+------------+------------ ---------------------------------------------- +---------------------------- +------------------- | #| pid| شروع ڪيو | مدت| blocking_pids| تعلق | موڊ| لاڪ ٽائپ +--------- +--------- +------ +--------- +--------- ------------ +------------ +------------------------------- +------ --------------| 1| 26224| 2019-09-02 19:32:16 | 00:01:45| {26211}| 16541| AccessShareLock| تعلق | 2| 26390| 2019-09-02 19:34:03 | 00:00:53| {26211}| 16541| AccessShareLock| تعلق | 3| 26391| 2019-09-02 19:34:03 | 00:00:53| {26211}| 16541| AccessShareLock| تعلق | 4| 26531| 2019-09-02 19:35:27 | 00:00:12| {26211}| 16541| AccessShareLock| تعلق | 5| 27284| 2019-09-02 19:44:02 | 00:00:19| {27276}| 16541| AccessShareLock| تعلق | 6| 27283| 2019-09-02 19:44:02 | 00:00:19| {27276}| 16541| AccessShareLock| تعلق | 7| 27286| 2019-09-02 19:44:02 | 00:00:19| {27276}| 16541| AccessShareLock| تعلق | 8| 27423| 2019-09-02 19:45:24 | 00:00:12| {27394}| 16541| AccessShareLock| تعلق | 9| 27648| 2019-09-02 19:48:06 | 00:00:20| {27647}| 16541| AccessShareLock| تعلق | 10| 27650| 2019-09-02 19:48:06 | 00:00:20| {27647}| 16541| AccessShareLock| تعلق | 11| 27735| 2019-09-02 19:49:08 | 00:00:06| {27650}| 16541| AccessExclusiveLock| تعلق | 12| 28380| 2019-09-02 19:56:03 | 00:01:56| {28379}| 16541| AccessShareLock| تعلق | 13| 28379| 2019-09-02 19:56:03 | 00:00:01| 28377| 16541| AccessExclusiveLock| تعلق | | | | | 28376| |

بلاڪ ڪرڻ جي عمل جي تاريخ

درخواستون:

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

مثال طور

----------------------------------- ----------------------------------- ----------------------------------- ----------------------- بلاڪنگ پروسيس جي تاريخ +------+------------------ ------------------------- +---------------------------- -------------------------------------------- +-------------------------------- -------------------------------------------------------------- | #| pid| استعمال جو نالو| application_name| datname| شروع ڪيو | مدت| رياست| سوال +--------- +--------- +------------ +--------- +--------- --------------------------------------------------------------------------- ---------------------------------------- +------------------------------------------------ -----------------| 1| 26211| tuser| psql| tdb1| 2019-09-02 19:31:54 | 00:00:04| بيڪار| | 2| 26211| tuser| psql| tdb1| 2019-09-02 19:31:58 | 00:00:06| ٽرانزيڪشن ۾ بيڪار| شروع؛ | 3| 26211| tuser| psql| tdb1| 2019-09-02 19:32:16 | 00:01:45| ٽرانزيڪشن ۾ بيڪار| تالا ٽيبل wafer_data؛ | 4| 26211| tuser| psql| tdb1| 2019-09-02 19:35:54 | 00:01:23| بيڪار| انجام ڏيڻ | 5| 26211| tuser| psql| tdb1| 2019-09-02 19:38:46 | 00:00:02| ٽرانزيڪشن ۾ بيڪار| شروع؛ | 6| 26211| tuser| psql| tdb1| 2019-09-02 19:38:54 | 00:00:08| ٽرانزيڪشن ۾ بيڪار| تالا ٽيبل wafer_data؛ | 7| 26211| tuser| psql| tdb1| 2019-09-02 19:39:08 | 00:42:42| بيڪار| انجام ڏيڻ | 8| 26211| tuser| psql| tdb1| 2019-09-03 07:12:07 | 00:00:52| فعال| چونڊيو test_del()؛

ترقي.

ڏيکاريل بنيادي سوالن ۽ نتيجي ۾ رپورٽون اڳ ۾ ئي زندگي کي تمام آسان بڻائي ٿي جڏهن ڪارڪردگي جي واقعن جو تجزيو ڪيو وڃي.
بنيادي سوالن جي بنياد تي، توهان هڪ رپورٽ حاصل ڪري سگهو ٿا جيڪا مبہم طور تي Oracle's AWR وانگر آهي.
خلاصو رپورٽ جو مثال

+---------------------------------------------------------------- ----------------------------------- | سرگرمي ۽ انتظار لاءِ گڏيل رپورٽ.

جاري رکڻ گهرجي. قطار ۾ ايندڙ هڪ تالا جي تاريخ (pg_stat_locks) جي پيدائش آهي، ٽيبل ڀرڻ جي عمل جي وڌيڪ تفصيلي وضاحت.

جو ذريعو: www.habr.com

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