ProHoster > Blog > fitantanan-draharaha > Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra

Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra

Injeniera - nadika avy amin'ny teny latinina - aingam-panahy.
Ny injeniera dia afaka manao na inona na inona. (c) R. Diesel.
Epigraphs.
Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra
Na tantara iray momba ny antony ilΓ n'ny mpitantana angon-drakitra hahatsiaro ny lasany amin'ny fandaharana.

sasin-teny

Novana avokoa ny anarana rehetra. Kisendrasendra ny kisendrasendra. Ny hevitra dia maneho fotsiny ny hevitry ny mpanoratra.

Disclaimer ny garantie: Ny andian-dahatsoratra nomanina dia tsy ahitana famaritana amin'ny antsipiriany sy marina momba ireo tabilao sy script ampiasaina. Ny fitaovana dia tsy azo ampiasaina avy hatrany "AS IS".
Voalohany, noho ny habetsahan'ny fitaovana,
faharoa, noho ny fifandraisana akaiky amin'ny fototry ny famokarana tena mpanjifa.
Noho izany, ireo lahatsoratra dia tsy ahitana afa-tsy hevitra sy famaritana amin'ny endrika ankapobeny indrindra.
Angamba amin'ny ho avy dia hitombo amin'ny haavon'ny fandefasana ao amin'ny GitHub ny rafitra, na mety tsy. Ho hita ny fotoana.

Ny fiandohan'ny tantara - "Tadidinao ve ny nanombohan'izany rehetra izany".
Inona no nitranga vokatr'izany, amin'ny teny ankapobeny indrindra - "Synthesis ho iray amin'ireo fomba hanatsarana ny fahombiazan'ny PostgreSQLΒ»

Nahoana aho no mila izany rehetra izany?

Eny ary, voalohany, mba tsy hanadino, mahatsiaro ny andro be voninahitra amin'ny fisotroan-dronono.
Faharoa, hanara-maso izay voasoratra. Satria indraindray dia manomboka very hevitra aho ary manadino ny ampahany sasany.

Eny ary, ny zava-dehibe indrindra dia ny mety ho azo ampiasaina ho an'ny olona iray izany ary manampy azy ireo hisoroka ny fanavaozana ny kodiarana ary tsy hanangona rake. Amin'ny teny hafa, manatsara ny karma (fa tsy ny an'i Khabrov). Satria ny zavatra sarobidy indrindra eto amin'ity tontolo ity dia ny hevitra. Ny tena zava-dehibe dia ny fitadiavana hevitra. Saingy fanontaniana ara-teknika fotsiny ny mamadika hevitra iray ho zava-misy.

Noho izany, andao hanomboka, tsikelikely...

Famolavolana ny olana.

misy:

PostgreSQL(10.5), karazana entana mifangaro (OLTP+DSS), entana maivana antonony, hita ao amin'ny rahona AWS.
Tsy misy fanaraha-maso ny angon-drakitra; Ny fanaraha-maso ny fotodrafitrasa dia omena amin'ny endrika fitaovana AWS mahazatra amin'ny fanamafisana kely indrindra.

Ilaina io:

Araho ny zava-bita sy ny toetry ny angon-drakitra, mitadiava ary manana fampahalalana voalohany amin'ny fanatsarana ny fangatahana angon-drakitra mavesatra.

Fampidirana fohy na famakafakana ny safidy vahaolana

Hanombohana, andeha hojerentsika ny safidy hamahana ny olana amin'ny fomba fijery fampitahana ny tombony sy ny fatiantoka ho an'ny injeniera, ary avelao ireo izay manana zo amin'izany araka ny fandaharam-potoanan'ny mpiasa no hiatrika ny tombontsoa sy fahaverezan'ny fitantanana.

Safidy 1 - "Miasa amin'ny fangatahana"

Avelantsika ho toy ny misy ny zava-drehetra. Raha toa ka tsy afa-po amin'ny zavatra iray ao amin'ny fiasa, ny fanatanterahana ny angon-drakitra na ny fampiharana ny mpanjifa, dia hampandre ny injeniera DBA amin'ny alΓ lan'ny mailaka na amin'ny famoronana tranga iray ao amin'ny lovia tapakila.
Ny injeniera, rehefa nahazo ny fampandrenesana, dia hahatakatra ny olana, hanolotra vahaolana na hametraka ny olana eo amin'ny lamosina lamosina, manantena fa ny zava-drehetra dia hamaha ny tenany, ary na izany aza, ny zava-drehetra dia tsy ho ela.
Gingerbread sy donuts, mangana ary mibontsinaGingerbread sy donuts:
1. Tsy mila manao zavatra fanampiny.
2. Misy foana ny fahafahana manao fialan-tsiny sy manakorontana.
3. Fotoana be dia be azonao lanina amin'ny fahaizanao manokana.
Manga sy mivonto:
1. Na ho ela na ho haingana, ny mpanjifa dia hieritreritra momba ny maha-zava-dehibe ny fisiana sy ny rariny eran-tany eto amin'ity izao tontolo izao ity ary hametraka fanontaniana amin'ny tenany indray - nahoana aho no mandoa ny volako? Ny vokatr'izany dia mitovy foana - ny hany fanontaniana dia hoe rahoviana ny mpanjifa dia ho leo sy hanao veloma. Ary ho foana ny mpamatsy sakafo. Mampalahelo izany.
2. Fampandrosoana injeniera - aotra.
3. Fahasahiranana eo amin'ny fandaminana ny asa sy ny entana

Safidy 2- "Mandihy amin'ny ampongatapaka, mandrotsaka etona ary mitafy kiraro"

Fehintsoratra 1-Nahoana isika no mila rafitra fanaraha-maso, dia horaisinay ny zava-drehetra miaraka amin'ny fangatahana. Mandefa andiana karazana fanontaniana isan-karazany amin'ny rakibolana angon-drakitra sy fomba fijery mavitrika, velomina ny kaontera rehetra, mametraka ny zava-drehetra ao anaty tabilao, ary manadihady tsindraindray ny lisitra sy ny tabilao. Vokatr'izany dia manana grafika, tabilao, tatitra tsara tarehy na tsy tsara tarehy izahay. Ny zava-dehibe dia ny fananana bebe kokoa, bebe kokoa.
Fehintsoratra 2-Mamorona hetsika izahay ary manomboka ny famakafakana izany rehetra izany.
Fehintsoratra 3-Manomana antontan-taratasy iray izahay, antsoy tsotra izao ity antontan-taratasy ity - "ahoana no tokony hananganana tahiry."
Fehintsoratra 4-Ny mpanjifa, mahita izao famirapiratan'ny grafika sy isa rehetra izao, dia ao anatin'ny fahatokiana zaza tsy ampy taona - ankehitriny dia hiasa ho antsika ny zava-drehetra, tsy ho ela. Ary, misaraka mora foana sy tsy misy fanaintainana amin'ny fananany ara-bola izy. Matoky ihany koa ny mpitantana fa miasa tsara ny injeniera eto amintsika. Loading amin'ny ambony indrindra.
Fehintsoratra 5- Avereno tsy tapaka ny dingana 1.
Gingerbread sy donuts, mangana ary mibontsinaGingerbread sy donuts:
1. Tsotra sy azo vinavinaina ary feno asa ny fiainan'ny mpitantana sy ny injeniera. Mitabataba ny zava-drehetra, sahirana ny rehetra.
2. Tsy ratsy koa ny fiainan'ny mpanjifa - azony antoka foana fa mila manam-paharetana kely fotsiny izy dia hahomby ny zava-drehetra. Tsy mihatsara izany, eny, tsy rariny izao tontolo izao, amin'ny fiainana manaraka dia ho tsara vintana ianao.
Manga sy mivonto:
1. Na ho ela na ho haingana, dia hisy mpamatsy haingana kokoa amin'ny serivisy mitovy amin'izany izay hanao zavatra mitovy, saingy mora kokoa. Ary raha mitovy ny vokany, nahoana no mandoa bebe kokoa. Izay hitarika indray ny fanjavonan'ny feeder.
2. Mankaleo. Mankaleo ny hetsika tsy misy dikany.
3. Toy ny tamin'ny dikan-teny teo aloha dia tsy misy fivoarana. Fa ho an'ny injeniera, ny lafy ratsiny dia, tsy toy ny safidy voalohany, mila mamorona IBD tsy tapaka ianao. Ary mila fotoana izany. Izay azonao lanina ho tombontsoan'ny olon-tianao. Satria tsy afaka mikarakara ny tenanao ianao, tsy misy olona manome tsiny anao.

Safidy 3 - Tsy mila mamorona bisikileta ianao fa mila mividy sy mitaingina azy.

Tsy mahagaga raha mihinana pizza miaraka amin'ny labiera ny injeniera avy amin'ny orinasa hafa (oh, ny andron'ny voninahitr'i St. Petersburg tamin'ny taona 90). Andeha isika hampiasa rafitra fanaraha-maso izay natao, novolavolaina ary miasa, ary amin'ny ankapobeny ny tombony (tsara, farafaharatsiny ho an'ny mpamorona azy).
Gingerbread sy donuts, mangana ary mibontsinaGingerbread sy donuts:
1. Tsy ilaina ny mandany fotoana amin'ny famoronana zavatra efa noforonina. Raiso ary ampiasao.
2. Ny rafitra fanaraha-maso dia tsy nosoratan'ny adala ary mazava ho azy fa mahasoa.
3. Ny rafitra fanaraha-maso miasa matetika dia manome vaovao voasivana mahasoa.
Manga sy mivonto:
1. Ny injeniera amin'ity tranga ity dia tsy injeniera, fa mpampiasa ny vokatra hafa fotsiny.
2. Tsy maintsy resy lahatra ny mpanjifa fa ilaina ny mividy zavatra izay, amin'ny ankapobeny, dia tsy tiany ho takatra, ary tsy tokony ho takatra, ary amin'ny ankapobeny dia nekena ny tetibola ho an'ny taona ary tsy hiova. Avy eo dia mila mametraka loharano misaraka ianao ary manamboatra izany ho an'ny rafitra manokana. Ireo. aloha dia mila mandoa, mandoa ary mandoa indray. Ary mahihitra ny mpanjifa. Izany no fitsipika amin’izao fiainana izao.

Inona no atao - Chernyshevsky? Tena ilaina ny fanontanianao. (miaraka amin'ny)

Amin'ity tranga manokana ity sy ny zava-misy ankehitriny, azonao atao amin'ny fomba hafa kely izany - andao hanao rafitra fanaraha-maso manokana.
Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra
Eny, tsy rafitra, mazava ho azy, amin'ny dikan'ny teny feno, izay mafy loatra sy mihevi-tena ho ambony, fa farafaharatsiny manamora ny asanao ary manangona fampahalalana bebe kokoa hamahana ny zava-mitranga. Mba tsy hahitana ny tenanao amin'ny toe-javatra iray - "mandehana any, tsy fantatro hoe aiza, mitadiava zavatra, tsy fantatro izay."

Inona no mahatsara sy maharatsy an'ity safidy ity:

matihanina:
1. Mahaliana izany. Eny, farafaharatsiny mahaliana kokoa noho ny "datafile mihena, manova latabatra, sns."
2. Ireo dia fahaiza-manao vaovao sy fivoarana vaovao. Izay, na ho ela na ho haingana, dia hanome anao ny gingerbread sy donuts mendrika.
maharatsy ny mifampiresaka:
1. Tsy maintsy miasa ianao. Miasa mafy.
2. Tsy maintsy manazava tsy tapaka ny dikan'ny zavatra atao rehetra ianao.
3. Misy zavatra tsy maintsy atao sorona, satria ny hany loharanon-karena azon'ny injeniera - ny fotoana - dia voafetran'ny Universe.
4. Ny zavatra ratsy indrindra sy tsy mahafinaritra indrindra - ny vokany dia mety ho omby toy ny "Tsy totozy, tsy sahona, fa biby tsy fantatra."

Ireo izay tsy mandray risika dia tsy misotro champagne.
Noho izany - manomboka ny fahafinaretana.

Hevitra ankapobeny - schematically

Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra
(Fanoharana nalaina tao amin’ilay lahatsoratra Β«Synthesis ho iray amin'ireo fomba hanatsarana ny fahombiazan'ny PostgreSQLΒ»)

fanazavana:

  • Ny fanitarana PostgreSQL mahazatra "pg_stat_statements" dia napetraka ao amin'ny angon-drakitra kendrena.
  • Ao amin'ny angon-drakitra fanaraha-maso, dia mamorona latabatra serivisy ho fitehirizana ny tantaran'ny pg_stat_statements amin'ny dingana voalohany sy hametrahana metrika sy fanaraha-maso amin'ny ho avy.
  • Ao amin'ny mpampiantrano mpanara-maso dia mamorona andiana sora-bash izahay, anisan'izany ny famoronana trangan-javatra ao amin'ny rafitra tapakila.

latabatra serivisy

Voalohany, schematic notsorina ERD, izay nitranga tamin'ny farany:
Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra
Famaritana fohy momba ny latabatraendpoint β€” mpampiantrano, teboka ifandraisana amin'ny ohatra
Database - masontsivana database
pg_stat_history - latabatra ara-tantara ho fitehirizana sary vonjimaika amin'ny fijery pg_stat_statements amin'ny angon-drakitra kendrena
metric_glossary - rakibolana momba ny metrika fampisehoana
metric_config - fanamafisana ny metrika tsirairay
mimetatra - metrika manokana ho an'ny fangatahana izay araha-maso
metric_alert_history - tantaran'ny fampitandremana momba ny fampisehoana
log_query - latabatra serivisy fitehirizana ireo firaketana voasakana avy amin'ny fisie log PostgreSQL nalaina tao amin'ny AWS
fototra - masontsivana ny fe-potoana ampiasaina ho fototra
toeram-pisavana - fanamafisana ny metrika hanamarinana ny toetry ny angon-drakitra
checkpoint_alert_history - tantara fampitandremana momba ny mari-pamantarana fanamarinana ara-pahasalamana
pg_stat_db_queries - latabatra serivisy momba ny fangatahana mavitrika
activity_log - latabatra serivisy logiciel
trap_oid - latabatra serivisy fanamafisana fandrika

Dingana 1 - manangona vaovao momba ny statistika momba ny zava-bita ary mahazo tatitra

Ny latabatra dia ampiasaina hitahiry ny mombamomba ny statistika pg_stat_history
pg_stat_history rafitra latabatra

                                          Tsanganana "public.pg_stat_history" | Type | Modifiers---------------------+--------------------------------------- - --------------------------------------------------- id | integer | tsy null default nextval('pg_stat_history_id_seq'::regclass) snapshot_timestamp | famantaranandro tsy misy faritry ny ora | database_id | integer | dbid | oid | userid | oid | queryid | bigint | fanontaniana | lahatsoratra | antso | bigint | total_time | avo roa heny ny marina | min_time | avo roa heny ny marina | max_time | avo roa heny ny marina | mean_time | avo roa heny ny marina | stddev_time | avo roa heny ny marina | andalana | bigint | shared_blks_hit | bigint | shared_blks_read | bigint | shared_blks_dirtied | bigint | shared_blks_written | bigint | local_blks_hit | bigint | local_blks_read | bigint | local_blks_dirtied | bigint | local_blks_written | bigint | temp_blks_read | bigint | temp_blks_written | bigint | blk_read_time | avo roa heny ny marina | blk_write_time | avo roa heny mazava tsara | baseline_id | integer | Fanondroana: "pg_stat_history_pkey" KEY PRIMARY, btree (id) "database_idx" btree (database_id) "queryid_idx" btree (queryid) "snapshot_timestamp_idx" btree (snapshot_timestamp) Fepetra fanalahidin'ny vahiny: (Yfdatabase_IDX_database) ) AMIN'NY DELETE CASCADE

Araka ny hitanao, ny tabilao dia ny angona fijerena mitambatra fotsiny pg_stat_statements ao amin'ny tahiry kendrena.

Ny fampiasana an'io latabatra io dia tena tsotra

pg_stat_history dia haneho ny antontan'isa voaangona momba ny fanatanterahana fanontaniana isaky ny ora. Amin'ny fiandohan'ny ora tsirairay, aorian'ny famenoana ny latabatra, ny antontan'isa pg_stat_statements reset amin'ny pg_stat_statements_reset().
Fanamarihana: Angonina ny antontan'isa ho an'ny fanontaniana manana faharetan'ny fanatanterahana mihoatra ny 1 segondra.
Mametraka ny tabilao pg_stat_history

--pg_stat_history.sql
CREATE OR REPLACE FUNCTION pg_stat_history( ) RETURNS boolean AS $$
DECLARE
  endpoint_rec record ;
  database_rec record ;
  pg_stat_snapshot record ;
  current_snapshot_timestamp timestamp without time zone;
BEGIN
  current_snapshot_timestamp = date_trunc('minute',now());  
  
  FOR endpoint_rec IN SELECT * FROM endpoint 
  LOOP
    FOR database_rec IN SELECT * FROM database WHERE endpoint_id = endpoint_rec.id 
	  LOOP
	    
		RAISE NOTICE 'NEW SHAPSHOT IS CREATING';
		
		--Connect to the target DB	  
	    EXECUTE 'SELECT dblink_connect(''LINK1'',''host='||endpoint_rec.host||' dbname='||database_rec.name||' user=USER password=PASSWORD '')';
 
        RAISE NOTICE 'host % and dbname % ',endpoint_rec.host,database_rec.name;
		RAISE NOTICE 'Creating snapshot of pg_stat_statements for database %',database_rec.name;
		
		SELECT 
	      *
		INTO 
		  pg_stat_snapshot
	    FROM dblink('LINK1',
	      'SELECT 
	       dbid , SUM(calls),SUM(total_time),SUM(rows) ,SUM(shared_blks_hit) ,SUM(shared_blks_read) ,SUM(shared_blks_dirtied) ,SUM(shared_blks_written) , 
           SUM(local_blks_hit) , SUM(local_blks_read) , SUM(local_blks_dirtied) , SUM(local_blks_written) , SUM(temp_blks_read) , SUM(temp_blks_written) , SUM(blk_read_time) , SUM(blk_write_time)
	       FROM pg_stat_statements WHERE dbid=(SELECT oid from pg_database where datname=current_database() ) 
		   GROUP BY dbid
  	      '
	               )
	      AS t
	       ( dbid oid , calls bigint , 
  	         total_time double precision , 
	         rows bigint , shared_blks_hit bigint , shared_blks_read bigint ,shared_blks_dirtied bigint ,shared_blks_written	 bigint ,
             local_blks_hit	 bigint ,local_blks_read bigint , local_blks_dirtied bigint ,local_blks_written bigint ,
             temp_blks_read	 bigint ,temp_blks_written bigint ,
             blk_read_time double precision , blk_write_time double precision	  
	       );
		 
		INSERT INTO pg_stat_history
          ( 
		    snapshot_timestamp  ,database_id  ,
			dbid , calls  ,total_time ,
            rows ,shared_blks_hit  ,shared_blks_read  ,shared_blks_dirtied  ,shared_blks_written ,local_blks_hit , 	 	
            local_blks_read,local_blks_dirtied,local_blks_written,temp_blks_read,temp_blks_written, 	
            blk_read_time, blk_write_time 
		  )		  
	    VALUES
	      (
	       current_snapshot_timestamp ,
		   database_rec.id ,
	       pg_stat_snapshot.dbid ,pg_stat_snapshot.calls,
	       pg_stat_snapshot.total_time,
	       pg_stat_snapshot.rows ,pg_stat_snapshot.shared_blks_hit ,pg_stat_snapshot.shared_blks_read ,pg_stat_snapshot.shared_blks_dirtied ,pg_stat_snapshot.shared_blks_written , 
           pg_stat_snapshot.local_blks_hit , pg_stat_snapshot.local_blks_read , pg_stat_snapshot.local_blks_dirtied , pg_stat_snapshot.local_blks_written , 
	       pg_stat_snapshot.temp_blks_read , pg_stat_snapshot.temp_blks_written , pg_stat_snapshot.blk_read_time , pg_stat_snapshot.blk_write_time 	   
	      );		   
		  
        RAISE NOTICE 'Creating snapshot of pg_stat_statements for queries with min_time more than 1000ms';
	
        FOR pg_stat_snapshot IN
          --All queries with max_time greater than 1000 ms
	      SELECT 
	        *
	      FROM dblink('LINK1',
	        'SELECT 
	         dbid , userid ,queryid,query,calls,total_time,min_time ,max_time,mean_time, stddev_time ,rows ,shared_blks_hit ,
			 shared_blks_read ,shared_blks_dirtied ,shared_blks_written , 
             local_blks_hit , local_blks_read , local_blks_dirtied , 
			 local_blks_written , temp_blks_read , temp_blks_written , blk_read_time , 
			 blk_write_time
	         FROM pg_stat_statements 
			 WHERE dbid=(SELECT oid from pg_database where datname=current_database() AND min_time >= 1000 ) 
  	        '

	                  )
	        AS t
	         ( dbid oid , userid oid , queryid bigint ,query text , calls bigint , 
  	           total_time double precision ,min_time double precision	 ,max_time double precision	 , mean_time double precision	 ,  stddev_time double precision	 , 
	           rows bigint , shared_blks_hit bigint , shared_blks_read bigint ,shared_blks_dirtied bigint ,shared_blks_written	 bigint ,
               local_blks_hit	 bigint ,local_blks_read bigint , local_blks_dirtied bigint ,local_blks_written bigint ,
               temp_blks_read	 bigint ,temp_blks_written bigint ,
               blk_read_time double precision , blk_write_time double precision	  
	         )
	    LOOP
		  INSERT INTO pg_stat_history
          ( 
		    snapshot_timestamp  ,database_id  ,
			dbid ,userid  , queryid  , query  , calls  ,total_time ,min_time ,max_time ,mean_time ,stddev_time ,
            rows ,shared_blks_hit  ,shared_blks_read  ,shared_blks_dirtied  ,shared_blks_written ,local_blks_hit , 	 	
            local_blks_read,local_blks_dirtied,local_blks_written,temp_blks_read,temp_blks_written, 	
            blk_read_time, blk_write_time 
		  )		  
	      VALUES
	      (
	       current_snapshot_timestamp ,
		   database_rec.id ,
	       pg_stat_snapshot.dbid ,pg_stat_snapshot.userid ,pg_stat_snapshot.queryid,pg_stat_snapshot.query,pg_stat_snapshot.calls,
	       pg_stat_snapshot.total_time,pg_stat_snapshot.min_time ,pg_stat_snapshot.max_time,pg_stat_snapshot.mean_time, pg_stat_snapshot.stddev_time ,
	       pg_stat_snapshot.rows ,pg_stat_snapshot.shared_blks_hit ,pg_stat_snapshot.shared_blks_read ,pg_stat_snapshot.shared_blks_dirtied ,pg_stat_snapshot.shared_blks_written , 
           pg_stat_snapshot.local_blks_hit , pg_stat_snapshot.local_blks_read , pg_stat_snapshot.local_blks_dirtied , pg_stat_snapshot.local_blks_written , 
	       pg_stat_snapshot.temp_blks_read , pg_stat_snapshot.temp_blks_written , pg_stat_snapshot.blk_read_time , pg_stat_snapshot.blk_write_time 	   
	      );
		  
        END LOOP;

        PERFORM dblink_disconnect('LINK1');  
				
	  END LOOP ;--FOR database_rec IN SELECT * FROM database WHERE endpoint_id = endpoint_rec.id 
    
  END LOOP;

RETURN TRUE;  
END
$$ LANGUAGE plpgsql;

Vokatr'izany, taorian'ny fe-potoana sasany teo amin'ny latabatra pg_stat_history hanana sarin'ny votoatin'ny latabatra isika pg_stat_statements angon-drakitra kendrena.

Tena mitatitra

Amin'ny fampiasana fanontaniana tsotra dia afaka mahazo tatitra tena ilaina sy mahaliana ianao.

Angon-drakitra natambatra mandritra ny fe-potoana iray

Request

SELECT 
  database_id , 
  SUM(calls) AS calls ,SUM(total_time)  AS total_time ,
  SUM(rows) AS rows , SUM(shared_blks_hit)  AS shared_blks_hit,
  SUM(shared_blks_read) AS shared_blks_read ,
  SUM(shared_blks_dirtied) AS shared_blks_dirtied,
  SUM(shared_blks_written) AS shared_blks_written , 
  SUM(local_blks_hit) AS local_blks_hit , 
  SUM(local_blks_read) AS local_blks_read , 
  SUM(local_blks_dirtied) AS local_blks_dirtied , 
  SUM(local_blks_written)  AS local_blks_written,
  SUM(temp_blks_read) AS temp_blks_read, 
  SUM(temp_blks_written) temp_blks_written , 
  SUM(blk_read_time) AS blk_read_time , 
  SUM(blk_write_time) AS blk_write_time
FROM 
  pg_stat_history
WHERE 
  queryid IS NULL AND
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT
GROUP BY database_id ;

Ora DB

to_char(elanelanelan'ny '1 milisegondra' * pg_total_stat_history_rec.total_time, 'HH24:MI:SS.MS')

Ora I/O

to_char(elanelanelan'ny '1 milisegondra' * ( pg_total_stat_history_rec.blk_read_time + pg_total_stat_history_rec.blk_write_time ), 'HH24:MI:SS.MS')

TOP10 SQL amin'ny total_time

Request

SELECT 
  queryid , 
  SUM(calls) AS calls ,
  SUM(total_time)  AS total_time  	
FROM 
  pg_stat_history
WHERE 
  queryid IS NOT NULL AND 
  database_id = DATABASE_ID AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT 
GROUP BY queryid 
ORDER BY 3 DESC 
LIMIT 10
--------------------------------------------------- ----------------------------------- | TOP10 SQL AMIN'NY TOTAL FOTOANA FAHAFATESANA | #| queryid| antso| miantso %| total_time (ms) | dbtime % +----------+-----------+-----------+-----------+ ------ --------------------------+---------- | 1| 821760255| 2| .00001|00:03:23.141( 203141.681 ms.)| 5.42 | 2| 4152624390| 2| .00001|00:03:13.929( 193929.215 ms.)| 5.17 | 3| 1484454471| 4| .00001|00:02:09.129( 129129.057 ms.)| 3.44 | 4| 655729273| 1| .00000|00:02:01.869( 121869.981 ms.)| 3.25 | 5| 2460318461| 1| .00000|00:01:33.113( 93113.835 ms.)| 2.48 | 6| 2194493487| 4| .00001|00:00:17.377( 17377.868 ms.)| .46 | 7| 1053044345| 1| .00000|00:00:06.156( 6156.352 ms.)| .16 | 8| 3644780286| 1| .00000|00:00:01.063( 1063.830 ms.)| .03

TOP10 SQL amin'ny totalin'ny fotoana I/O

Request

SELECT 
  queryid , 
  SUM(calls) AS calls ,
  SUM(blk_read_time + blk_write_time)  AS io_time
FROM 
  pg_stat_history
WHERE 
  queryid IS NOT NULL AND 
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT
GROUP BY  queryid 
ORDER BY 3 DESC 
LIMIT 10
--------------------------------------------------- --------------------------------------------------- | TOP10 SQL AMIN'NY TOTAL I/O TIME | #| queryid| antso| miantso %| Ora I/O (ms)|db I/O fotoana % +----+-----------+-----------+------ ------------------------+--------------------------------+----- ------ -- | 1| 4152624390| 2| .00001|00:08:31.616( 511616.592 ms.)| 31.06 | 2| 821760255| 2| .00001|00:08:27.099( 507099.036 ms.)| 30.78 | 3| 655729273| 1| .00000|00:05:02.209( 302209.137 ms.)| 18.35 | 4| 2460318461| 1| .00000|00:04:05.981( 245981.117 ms.)| 14.93 | 5| 1484454471| 4| .00001|00:00:39.144( 39144.221 ms.)| 2.38 | 6| 2194493487| 4| .00001|00:00:18.182( 18182.816 ms.)| 1.10 | 7| 1053044345| 1| .00000|00:00:16.611( 16611.722 ms.)| 1.01 | 8| 3644780286| 1| .00000|00:00:00.436( 436.205 ms.)| .03

TOP10 SQL amin'ny fotoana famonoana farany

Request

SELECT 
  id AS snapshotid , 
  queryid , 
  snapshot_timestamp ,  
  max_time 
FROM 
  pg_stat_history 
WHERE 
  queryid IS NOT NULL AND 
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT
ORDER BY 4 DESC 
LIMIT 10

--------------------------------------------------- ---------------------------------------------------- | TOP10 SQL AMIN'NY MAX FOTOANA FAHAFATESANA | #| sary | snapshotID| queryid| max_time (ms) +----+---------------------+--------- ---+---------------------------------------------------- | 1| 05.04.2019/01/03 4169:655729273| 00| 02| 01.869:121869.981:2( 04.04.2019 ms.) | 17| 00/4153/821760255 00:01| 41.570| 101570.841| 3:04.04.2019:16( 00 ms.) | 4146| 821760255/00/01 41.570:101570.841| 4| 04.04.2019| 16:00:4144( 4152624390 ms.) | 00| 01/36.964/96964.607 5:04.04.2019| 17| 00| 4151:4152624390:00(01 ms.) | 36.964| 96964.607/6/05.04.2019 10:00| 4188| 1484454471| 00:01:33.452(93452.150 ms.) | 7| 04.04.2019/17/00 4150:2460318461| 00| 01| 33.113:93113.835:8( 04.04.2019 ms.) | 15| 00/4140/1484454471 00:00| 11.892| 11892.302| 9:04.04.2019:16(00 ms.) | 4145| 1484454471/00/00 11.892:11892.302| 10| 04.04.2019| 17:00:4152( 1484454471 ms.) | 00| 00/11.892/11892.302 XNUMX:XNUMX| XNUMX| XNUMX| XNUMX:XNUMX:XNUMX( XNUMX ms.) | XNUMX| XNUMX/XNUMX/XNUMX XNUMX:XNUMX| XNUMX| XNUMX| XNUMX:XNUMX:XNUMX( XNUMX ms.)

TOP10 SQL by SHARED buffer mamaky/manoratra

Request

SELECT 
  id AS snapshotid , 
  queryid ,
  snapshot_timestamp , 
  shared_blks_read , 
  shared_blks_written 
FROM 
  pg_stat_history
WHERE 
  queryid IS NOT NULL AND 
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT AND
  ( shared_blks_read > 0 OR shared_blks_written > 0 )
ORDER BY 4 DESC  , 5 DESC 
LIMIT 10
--------------------------------------------------- ------------------------------------------ | TOP10 SQL BY SHARED BUFFER READ/WRITE | #| sary | snapshotID| queryid| novakiana ny sakana iombonana| blocs zaraina manoratra +----+-----+-----------+---------- -------------------------------------- | 1| 04.04.2019/17/00 4153:821760255| 797308| 0| 2| 04.04.2019 | 16| 00/4146/821760255 797308:0| 3| 05.04.2019| 01| 03 | 4169| 655729273/797158/0 4:04.04.2019| 16| 00| 4144| 4152624390 | 756514| 0/5/04.04.2019 17:00| 4151| 4152624390| 756514| 0 | 6| 04.04.2019/17/00 4150:2460318461| 734117| 0| 7| 04.04.2019 | 17| 00/4155/3644780286 52973:0| 8| 05.04.2019| 01| 03 | 4168| 1053044345/52818/0 9:04.04.2019| 15| 00| 4141| 2194493487 | 52813| 0/10/04.04.2019 16:00| 4147| 2194493487| 52813| 0 | XNUMX| XNUMX/XNUMX/XNUMX XNUMX:XNUMX| XNUMX| XNUMX| XNUMX| XNUMX | XNUMX| XNUMX/XNUMX/XNUMX XNUMX:XNUMX| XNUMX| XNUMX| XNUMX| XNUMX ------------------------------------------------- ------------------------------------------

Histograman'ny fizarana fangatahana amin'ny fotoana fanatanterahana farany indrindra

fangatahana

SELECT  
  MIN(max_time) AS hist_min  , 
  MAX(max_time) AS hist_max , 
  (( MAX(max_time) - MIN(min_time) ) / hist_columns ) as hist_width
FROM 
  pg_stat_history 
WHERE 
  queryid IS NOT NULL AND
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT ;

SELECT 
  SUM(calls) AS calls
FROM 
  pg_stat_history 
WHERE 
  queryid IS NOT NULL AND
  database_id =DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT AND 
  ( max_time >= hist_current_min AND  max_time < hist_current_max ) ;

|------------------------------------------------ - --------------------------------------------------- | MAX_TIME HISTOGRAM | TOTAL ANTSO: 33851920 | FOTOANA MIN: 00:00:01.063 | FOTOANA MAX: 00:02:01.869 ------------------------------------------ ---------------------------------------------------- | minitra maharitra| faharetana max| miantso +---------------------------------+------------- ---------------------+---------- | 00:00:01.063( 1063.830 ms.) | 00:00:13.144( 13144.445 ms.) | 9 | 00:00:13.144( 13144.445 ms.) | 00:00:25.225( 25225.060 ms.) | 0 | 00:00:25.225( 25225.060 ms.) | 00:00:37.305( 37305.675 ms.) | 0 | 00:00:37.305( 37305.675 ms.) | 00:00:49.386( 49386.290 ms.) | 0 | 00:00:49.386( 49386.290 ms.) | 00:01:01.466( 61466.906 ms.) | 0 | 00:01:01.466( 61466.906 ms.) | 00:01:13.547( 73547.521 ms.) | 0 | 00:01:13.547( 73547.521 ms.) | 00:01:25.628( 85628.136 ms.) | 0 | 00:01:25.628( 85628.136 ms.) | 00:01:37.708( 97708.751 ms.) | 4 | 00:01:37.708( 97708.751 ms.) | 00:01:49.789( 109789.366 ms.) | 2 | 00:01:49.789( 109789.366 ms.) | 00:02:01.869( 121869.981 ms.) | 0

Snapshots TOP10 amin'ny fanontaniana isan-tsegondra

fangatahana

--pg_qps.sql
--Calculate Query Per Second 
CREATE OR REPLACE FUNCTION pg_qps( pg_stat_history_id integer ) RETURNS double precision AS $$
DECLARE
 pg_stat_history_rec record ;
 prev_pg_stat_history_id integer ;
 prev_pg_stat_history_rec record;
 total_seconds double precision ;
 result double precision;
BEGIN 
  result = 0 ;
  
  SELECT *
  INTO pg_stat_history_rec
  FROM 
    pg_stat_history
  WHERE id = pg_stat_history_id ;

  IF pg_stat_history_rec.snapshot_timestamp IS NULL 
  THEN
    RAISE EXCEPTION 'ERROR - Not found pg_stat_history for id = %',pg_stat_history_id;
  END IF ;  
  
 --RAISE NOTICE 'pg_stat_history_id = % , snapshot_timestamp = %', pg_stat_history_id , 
 pg_stat_history_rec.snapshot_timestamp ;
  
  SELECT 
    MAX(id)   
  INTO
    prev_pg_stat_history_id
  FROM
    pg_stat_history
  WHERE 
    database_id = pg_stat_history_rec.database_id AND
	queryid IS NULL AND
	id < pg_stat_history_rec.id ;

  IF prev_pg_stat_history_id IS NULL 
  THEN
    RAISE NOTICE 'Not found previous pg_stat_history shapshot for id = %',pg_stat_history_id;
	RETURN NULL ;
  END IF;
  
  SELECT *
  INTO prev_pg_stat_history_rec
  FROM 
    pg_stat_history
  WHERE id = prev_pg_stat_history_id ;
  
  --RAISE NOTICE 'prev_pg_stat_history_id = % , prev_snapshot_timestamp = %', prev_pg_stat_history_id , prev_pg_stat_history_rec.snapshot_timestamp ;    

  total_seconds = extract(epoch from ( pg_stat_history_rec.snapshot_timestamp - prev_pg_stat_history_rec.snapshot_timestamp ));
  
  --RAISE NOTICE 'total_seconds = % ', total_seconds ;    
  
  --RAISE NOTICE 'calls = % ', pg_stat_history_rec.calls ;      
  
  IF total_seconds > 0 
  THEN
    result = pg_stat_history_rec.calls / total_seconds ;
  ELSE
   result = 0 ; 
  END IF;
   
 RETURN result ;
END
$$ LANGUAGE plpgsql;


SELECT 
  id , 
  snapshot_timestamp ,
  calls , 	
  total_time , 
  ( select pg_qps( id )) AS QPS ,
  blk_read_time ,
  blk_write_time
FROM 
  pg_stat_history
WHERE 
  queryid IS NULL AND 
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT AND
  ( select pg_qps( id )) IS NOT NULL 
ORDER BY 5 DESC 
LIMIT 10

|------------------------------------------------ - --------------------------------------------------- | Snapshots TOP10 voafaritry ny isa QueryPerSeconds -------------------------------------------- --------------------------------------------------- ------------------------------------------------- | #| sary | snapshotID| antso| total dbtime| QPS| I/O fotoana| Fotoana I/O % + --------------------------------+------- ----+----------------------------------+--------- -------------------------+----------- | 1| 04.04.2019/20/04 4161:5758631| 00| 06| 30.513:390513.926:1573.396( 00 ms.)| 00| 01.470:1470.110:376( 2 ms.)| .04.04.2019 | 17| 00/4149/3529197 00:11| 48.830| 708830.618| 980.332:00:12( 47.834 ms.)| 767834.052| 108.324:3:04.04.2019( 16 ms.)| 00 | 4143| 3525360/00/10 13.492:613492.351| 979.267| 00| 08:41.396:521396.555( 84.988 ms.)| 4| 04.04.2019:21:03(4163 ms.)| 2781536 | 00| 03/06.470/186470.979 785.745:00| 00| 00.249| 249.865:134:5( 04.04.2019 ms.)| 19| 03:4159:2890362( 00 ms.)| .03 | 16.784| 196784.755 776.979:00| 00| 01.441| 1441.386:732:6( 04.04.2019 ms.)| 14| 00:4137:2397326( 00 ms.)| .04 | 43.033| 283033.854/665.924/00 00:00.024| 24.505| 009| 7:04.04.2019:15( 00 ms.)| 4139| 2394416:00:04(51.435 ms.)| .291435.010 | 665.116| 00/00/12.025 12025.895:4.126| 8| 04.04.2019| 13:00:4135( 2373043 ms.)| 00| 04:26.791:266791.988( 659.179 ms.)| 00 | 00| 00.064 64.261:024| 9| 05.04.2019| 01:03:4167( 4387191 ms.)| 00| 06:51.380:411380.293( 609.332 ms.)| .00 | 05| 18.847/318847.407/77.507 10:04.04.2019| 18| 01| 4157:1145596:00( 01 ms.)| 19.217| 79217.372:313.004:00( 00 ms.)| 01.319 | 1319.676| 1.666/XNUMX/XNUMX XNUMX:XNUMX| XNUMX| XNUMX| XNUMX:XNUMX:XNUMX( XNUMX ms.)| XNUMX| XNUMX:XNUMX:XNUMX( XNUMX ms.)| XNUMX

Tantaran'ny famonoana isan'ora miaraka amin'ny QueryPerSeconds sy Ora I/O

Request

SELECT 
  id , 
  snapshot_timestamp ,
  calls , 	
  total_time , 
  ( select pg_qps( id )) AS QPS ,
  blk_read_time ,
  blk_write_time
FROM 
  pg_stat_history
WHERE 
  queryid IS NULL AND 
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT
ORDER BY 2

|-----------------------------------------------------------------------------------------------
| HOURLY EXECUTION HISTORY  WITH QueryPerSeconds and I/O Time
-----------------------------------------------------------------------------------------------------------------------------------------------
| QUERY PER SECOND HISTORY
|    #|          snapshot| snapshotID|      calls|                      total dbtime|        QPS|                          I/O time| I/O time %
+-----+------------------+-----------+-----------+----------------------------------+-----------+----------------------------------+-----------
|    1|  04.04.2019 11:00|       4131|       3747|  00:00:00.835(       835.374 ms.)|      1.041|  00:00:00.000(          .000 ms.)|       .000
|    2|  04.04.2019 12:00|       4133|    1002722|  00:01:52.419(    112419.376 ms.)|    278.534|  00:00:00.149(       149.105 ms.)|       .133
|    3|  04.04.2019 13:00|       4135|    2373043|  00:04:26.791(    266791.988 ms.)|    659.179|  00:00:00.064(        64.261 ms.)|       .024
|    4|  04.04.2019 14:00|       4137|    2397326|  00:04:43.033(    283033.854 ms.)|    665.924|  00:00:00.024(        24.505 ms.)|       .009
|    5|  04.04.2019 15:00|       4139|    2394416|  00:04:51.435(    291435.010 ms.)|    665.116|  00:00:12.025(     12025.895 ms.)|      4.126
|    6|  04.04.2019 16:00|       4143|    3525360|  00:10:13.492(    613492.351 ms.)|    979.267|  00:08:41.396(    521396.555 ms.)|     84.988
|    7|  04.04.2019 17:00|       4149|    3529197|  00:11:48.830(    708830.618 ms.)|    980.332|  00:12:47.834(    767834.052 ms.)|    108.324
|    8|  04.04.2019 18:01|       4157|    1145596|  00:01:19.217(     79217.372 ms.)|    313.004|  00:00:01.319(      1319.676 ms.)|      1.666
|    9|  04.04.2019 19:03|       4159|    2890362|  00:03:16.784(    196784.755 ms.)|    776.979|  00:00:01.441(      1441.386 ms.)|       .732
|   10|  04.04.2019 20:04|       4161|    5758631|  00:06:30.513(    390513.926 ms.)|   1573.396|  00:00:01.470(      1470.110 ms.)|       .376
|   11|  04.04.2019 21:03|       4163|    2781536|  00:03:06.470(    186470.979 ms.)|    785.745|  00:00:00.249(       249.865 ms.)|       .134
|   12|  04.04.2019 23:03|       4165|    1443155|  00:01:34.467(     94467.539 ms.)|    200.438|  00:00:00.015(        15.287 ms.)|       .016
|   13|  05.04.2019 01:03|       4167|    4387191|  00:06:51.380(    411380.293 ms.)|    609.332|  00:05:18.847(    318847.407 ms.)|     77.507
|   14|  05.04.2019 02:03|       4171|     189852|  00:00:10.989(     10989.899 ms.)|     52.737|  00:00:00.539(       539.110 ms.)|      4.906
|   15|  05.04.2019 03:01|       4173|       3627|  00:00:00.103(       103.000 ms.)|      1.042|  00:00:00.004(         4.131 ms.)|      4.010
|   16|  05.04.2019 04:00|       4175|       3627|  00:00:00.085(        85.235 ms.)|      1.025|  00:00:00.003(         3.811 ms.)|      4.471
|   17|  05.04.2019 05:00|       4177|       3747|  00:00:00.849(       849.454 ms.)|      1.041|  00:00:00.006(         6.124 ms.)|       .721
|   18|  05.04.2019 06:00|       4179|       3747|  00:00:00.849(       849.561 ms.)|      1.041|  00:00:00.000(          .051 ms.)|       .006
|   19|  05.04.2019 07:00|       4181|       3747|  00:00:00.839(       839.416 ms.)|      1.041|  00:00:00.000(          .062 ms.)|       .007
|   20|  05.04.2019 08:00|       4183|       3747|  00:00:00.846(       846.382 ms.)|      1.041|  00:00:00.000(          .007 ms.)|       .001
|   21|  05.04.2019 09:00|       4185|       3747|  00:00:00.855(       855.426 ms.)|      1.041|  00:00:00.000(          .065 ms.)|       .008
|   22|  05.04.2019 10:00|       4187|       3797|  00:01:40.150(    100150.165 ms.)|      1.055|  00:00:21.845(     21845.217 ms.)|     21.812

Lahatsoratra amin'ny SQL-select rehetra

Request

SELECT 
  queryid , 
  query 
FROM 
  pg_stat_history
WHERE 
  queryid IS NOT NULL AND 
  database_id = DATABASE_ID  AND
  snapshot_timestamp BETWEEN BEGIN_TIMEPOINT AND END_TIMEPOINT
GROUP BY queryid , query

Ny vokany

Araka ny hitanao, amin'ny fampiasana fomba tsotra dia afaka mahazo fampahalalana mahasoa maro momba ny enta-mavesatra sy ny toetry ny angon-drakitra ianao.

Fanamarihana:Raha mirakitra an-tsoratra ny queryid amin'ny fanontaniana isika, dia hahazo ny tantara ho an'ny fangatahana manokana (mba hitsitsiana toerana, ny tatitra ho an'ny fanontaniana manokana dia nesorina).

Noho izany, misy sy angonina ny angona statistika momba ny fahombiazan'ny fangatahana.
Vita ny dingana voalohany "fanangonana data statistika".

Afaka mandroso amin'ny dingana faharoa ianao - "fametrahana ny metrika fampisehoana".
Fanaraha-maso ny fahombiazan'ny fangatahana PostgreSQL. Fizarana 1 - tatitra

Saingy tantara hafa izany.

Hanohy ...

Source: www.habr.com

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