Moenjiniere - e fetoletsoeng ho tloha Selatine - e bululetsoeng.
Moenjiniere a ka etsa eng kapa eng. (c) R. Disele.
Epigraphs.
Kapa pale e mabapi le hore na ke hobane'ng ha mookameli oa polokelo ea boitsebiso a hloka ho hopola lenaneo la hae la nakong e fetileng.
Tlhaloso
Mabitso ohle a fetotsoe. Lintho tse iketsahallang feela li etsahala. Boitsebiso bo emela feela maikutlo a botho a mongoli.
Boitlhotlhollo ba litiisetso: Letoto le reriloeng la lihlooho le ke ke la ba le tlhaloso e qaqileng le e nepahetseng ea litafole le mangolo a sebelisitsoeng. Thepa e ke ke ea sebelisoa hang-hang "JOALOKAHA E LE".
Taba ea pele, ka lebaka la bongata ba lintho tse bonahalang.
ea bobeli, ka lebaka la kamano e haufi le setsi sa tlhahiso ea moreki oa sebele.
Ka hona, lihlooho li tla ba le maikutlo le litlhaloso feela ka mokhoa o tloaelehileng ka ho fetisisa.
Mohlomong nakong e tlang sistimi e tla hola ho fihlela boemo ba ho romelloa ho GitHub, kapa mohlomong che. Nako e tla bonahala.
Tšimoloho ea pale - "".
Se etsahetseng ka lebaka leo, ka mantsoe a akaretsang - "»
Hobaneng ke hloka see sohle?
Hantle, pele, e le hore u se ke ua lebala, ho hopola matsatsi a khanyang ha u tlohela mosebetsi.
Taba ea bobeli, ke ho hlophisa se ngotsoeng. Hobane ka linako tse ling ke qala ho ferekana le ho lebala likarolo tse itseng.
Hantle, 'me ntho ea bohlokoa ka ho fetisisa ke hore e ka thusa motho e mong le ho mo thusa ho qoba ho tsosolosa lebili le ho se bokelle rake. Ka mantsoe a mang, ntlafatsa karma ea hau (eseng ea Khabrov). Hobane ntho ea bohlokoahali lefatšeng lena ke mehopolo. Ntho e ka sehloohong ke ho fumana maikutlo. Empa ho fetola mohopolo hore e be oa nnete ke potso ea tekheniki feela.
Kahoo, ha re qaleng, hanyane ka hanyane ...
Tlhahiso ea bothata.
E teng:
Database ea PostgreSQL(10.5), mofuta oa mojaro o tsoakiloeng (OLTP+DSS), mojaro o bobebe o mahareng, o lerung la AWS.
Ha ho na tlhaiso-leseling ea database; tlhahlobo ea lits'ebetso e fanoa ka mokhoa oa lisebelisoa tse tloaelehileng tsa AWS ka tlhophiso e nyane.
E ea hlokahala:
Lekola ts'ebetso le boemo ba database, fumana 'me u be le tlhaiso-leseling ea pele bakeng sa ho ntlafatsa lipotso tse boima tsa database.
Kenyelletso e khuts'oane kapa tlhahlobo ea likhetho tsa tharollo
Ho qala, a re lekeng ho sekaseka likhetho tsa ho rarolla bothata ho latela pono ea tlhahlobo ea papiso ea melemo le bofokoli ba moenjiniere, 'me ba nang le tokelo ea ho e fumana ho latela kemiso ea basebetsi ba sebetsane le melemo le melemo. tahlehelo ea tsamaiso.
Khetho ea 1 - "Ho sebetsa ka tlhokahalo"
Re tlohela tsohle joalo ka ha li le joalo. Haeba moreki a sa khotsofatsoe ke ho hong tšebetsong, ts'ebetsong ea polokelo ea boitsebiso kapa ts'ebeliso, o tla tsebisa lienjiniere tsa DBA ka lengolo-tsoibila kapa ka ho theha ketsahalo ka tereing ea litekete.
Moenjiniere, ha a se a fumane tsebiso, o tla utloisisa bothata, a fane ka tharollo kapa a behe bothata holim'a mollo o ka morao, a tšepile hore ntho e 'ngoe le e' ngoe e tla rarolla ka boeona, 'me leha ho le joalo, ntho e' ngoe le e 'ngoe e tla lebaloa haufinyane.
Bohobe ba ginger le li-donuts, matetetso le maqebaBohobe ba ginger le li-donuts:
1. Ha ho hlokahale ho etsa letho le eketsehileng.
2. Kamehla ho na le monyetla oa ho ipehela mabaka le ho qhekella.
3. Nako e ngata eo u ka e qetang ka boikhethelo ba hao.
Matetetso le maqeba:
1. Ha nako e ntse e ea, moreki o tla nahana ka bohlokoa ba ho ba teng le toka ea bokahohleng lefatšeng lena 'me a boele a ipotse potso - ke hobane'ng ha ke ba lefa chelete ea ka? Litlamorao li lula li ts'oana - potso feela ke ha moreki a tla teneha 'me a lumelise hantle. Mme sephepelo se tla be se se na letho. Ho bohloko.
2. Nts'etsopele ea moenjiniere - zero.
3. Mathata a ho rera mosebetsi le ho kenya
Khetho ea 2- "Ho tantša ka meropa, ho chesa le ho roala lieta"
Serapa sa 1-Hobaneng re hloka mokhoa oa ho beha leihlo, re tla amohela tsohle ka likopo. Re botsa lipotso tsa mefuta eohle ho bukantswe ya data le maikutlo a matla, re bulela mefuta yohle ya dibadi, re bea tsohle ditafoleng, mme nako le nako re sekaseka manane le ditafole. Ka lebaka leo, re na le li-graph tse ntle kapa tse seng ntle haholo, litafole, litlaleho. Ntho e ka sehloohong ke ho ba le ho feta, ho feta.
Serapa sa 2-Re hlahisa ts'ebetso mme re qala tlhahlobo ea tsena tsohle.
Serapa sa 3-Re ntse re lokisa tokomane e itseng, tokomane ena re e bitsa feela - "re lokela ho theha database joang."
Serapa sa 4-Moreki, ha a bona bokhabane bona bohle ba lirafshoa le lipalo, o ka kholiseho ea bana, e se nang kelello - joale ntho e 'ngoe le e' ngoe e tla sebetsa bakeng sa rona, haufinyane. 'Me, o arohana habonolo le ka mokhoa o se nang bohloko le mehloli ea hae ea lichelete. Batsamaisi ba boetse ba na le tšepo ea hore lienjiniere tsa rona li sebetsa hantle. Loading at maximum.
Serapa sa 5-Pheta Mohato oa 1 khafetsa.
Bohobe ba ginger le li-donuts, matetetso le maqebaBohobe ba ginger le li-donuts:
1. Bophelo ba batsamaisi le baenjiniere bo bonolo, bo lebeletsoe esale pele ebile bo tletse mesebetsi. Tsohle di a duma, bohle ba phathahane.
2. Bophelo ba moreki le bona ha bo bobe - o lula a kholisehile hore o hloka feela ho ba le mamello hanyenyane mme ntho e 'ngoe le e' ngoe e tla sebetsa. Ha e ntlafale, hantle, lefats'e ha le na toka, bophelong bo latelang u tla ba lehlohonolo.
Matetetso le maqeba:
1. Ha nako e ntse e ea, ho tla ba le mofani ea potlakileng oa tšebeletso e tšoanang ea tla etsa ntho e tšoanang, empa ka theko e tlaase. 'Me haeba sephetho se tšoana, ke hobane'ng ha u lefa ho feta. E leng se tla boela se lebise ho nyamela ha fepa.
2. Hoa tena. Ke mosebetsi ofe kapa ofe o se nang morero o tenang hakaakang.
3. Joalo ka phetolelong e fetileng, ha ho na tsoelo-pele. Empa bakeng sa moenjiniere, bothata ke hore, ho fapana le khetho ea pele, o hloka ho lula o hlahisa IBD. Mme sena se nka nako. Eo u ka e sebelisang molemong oa moratuoa oa hau. Hobane ha o khone ho itlhokomela, ha ho motho ea u fang molato ka uena.
Khetho ea 3 - Ha ho hlokahale hore u iqapele baesekele, u hloka feela ho e reka le ho e palama.
Hase lefeela hore baenjiniere ba lik'hamphani tse ling ba je pizza ka biri (oh, matsatsi a khanya a St. Petersburg ka 90s). Ha re sebeliseng litsamaiso tsa ho beha leihlo tse entsoeng, tse lokolotsoeng le tse sebetsang, 'me ka kakaretso li rua molemo (bonyane ho baetsi ba tsona).
Bohobe ba ginger le li-donuts, matetetso le maqebaBohobe ba ginger le li-donuts:
1. Ha ho na lebaka la ho senya nako ho tla ka ntho e seng e iqapetsoe. E nke 'me u e sebelise.
2. Litsamaiso tsa ho beha leihlo ha lia ngoloa ke maoatla, 'me li na le thuso.
3. Litsamaiso tse sebetsang tsa ho beha leihlo hangata li fana ka tlhahisoleseding e molemo e tlhotliloeng.
Matetetso le maqeba:
1. Tabeng ena moenjiniere ha se moenjiniere, empa ke mosebelisi oa sehlahisoa sa motho e mong kapa mosebelisi.
2. Moreki o tlameha ho kholiseha ka tlhokahalo ea ho reka ntho eo, ka kakaretso, a sa batleng ho e utloisisa, 'me ha ea lokela,' me ka kakaretso tekanyetso ea selemo e amohetsoe 'me e ke ke ea fetoha. Ebe o hloka ho fana ka sesebelisoa se arohaneng mme o se hlophise bakeng sa sistimi e itseng. Tseo. pele o hloka ho lefa, ho lefa le ho lefa hape. Mme moreki o qenehela. Ena ke tloaelo ea bophelo bona.
Seo u lokelang ho se etsa - Chernyshevsky? Potso ea hau e bohlokoa haholo. (Le)
Tabeng ena le boemo ba hona joale, u ka e etsa ka tsela e fapaneng - ha re iketsetse mokhoa oa rona oa ho beha leihlo.
Ha e le hantle, ha se tsamaiso, ka kutloisiso e feletseng ea lentsoe, e lerata haholo ebile e iketelletsa pele, empa bonyane ka tsela e itseng etsa hore mosebetsi oa hau o be bonolo 'me u bokelle boitsebiso bo eketsehileng ho rarolla liketsahalo tsa ts'ebetso. E le hore u se ke ua iphumana u le boemong - "ea moo, ha ke tsebe moo, fumana ntho e 'ngoe, ha ke tsebe hore na ke eng."
Melemo le likotsi tsa khetho ena ke life:
Melemo:
1. Sena sea thahasellisa. Le ha ho le joalo, bonyane e thahasellisa ho feta "ho fokotsa datafile, alter tablespace, joalo-joalo."
2. Tsena ke litsebo tse ncha le nts'etsopele e ncha. Eo, haufinyane kapa hamorao, e tla u fa gingerbread le li-donuts tse loketsoeng hantle.
Chelete:
1. U tla tlameha ho sebetsa. Sebetsa ka thata.
2. U tla tlameha ho hlalosa kamehla moelelo le litebello tsa mesebetsi eohle.
3. Ntho e tla tlameha ho etsoa sehlabelo, hobane mohloli o le mong feela o fumanehang ho moenjiniere - nako - o lekanyelitsoe ke Bokahohle.
4. Ntho e mpe ka ho fetisisa le e sa thabiseng ka ho fetisisa - phello e ka ba poho e kang "Eseng mouse, eseng senqanqane, empa phoofolo e sa tsejoeng."
Ba sa ipeheng kotsing ha ba noe champagne.
Kahoo - monate o qala.
Kakanyo e akaretsang - ka moralo
(Setšoantšo se nkiloeng sehloohong «»)
Tlhaloso:
- Katoloso e tloaelehileng ea PostgreSQL "pg_stat_statements" e kentsoe sebakeng sa polokelo ea litaba.
- Setsing sa polokelo ea litaba, re theha lethathamo la litafole tsa lits'ebeletso bakeng sa ho boloka nalane ea pg_stat_statements qalong le bakeng sa ho theha metrics le tlhahlobo nakong e tlang.
- Ho moamoheli ea behang leihlo, re theha sete ea mangolo a bash, ho kenyeletsoa le a ho hlahisa liketsahalo ka har'a sistimi ea litekete.
Litafole tsa litšebeletso
Taba ea pele, ke ERD e nolofalitsoeng ea moralo, se etsahetseng qetellong:
Tlhaloso e khuts'oane ea litafoleqetello - moamoheli, sebaka sa khokahano ho mohlala
polokelongtshedimosetso - li-parameter tsa database
pg_stat_history - tafole ea nalane ea ho boloka linepe tsa nakoana tsa pono ea pg_stat_statements ea polokelo ea polokelo
metric_glossary - bukantswe ya metrics ya tshebetso
metric_config - tlhophiso ea metrics ea motho ka mong
metric - metric e ikhethileng bakeng sa kopo e behiloeng leihlo
metric_alert_histori - nalane ea litemoso tsa ts'ebetso
log_query - tafole ea lits'ebeletso bakeng sa ho boloka lirekoto tse arotsoeng ho tsoa ho faele ea log ea PostgreSQL e jarollotsoeng ho tsoa ho AWS
motheo - mekhahlelo ea linako tse sebelisoang e le motheo
sebaka sa ho hlahloba - tlhophiso ea metrics bakeng sa ho lekola boemo ba database
checkpoint_alert_histori - nalane ea temoso ea metrics ea tlhahlobo ea bophelo bo botle ba database
pg_stat_db_queries — tafole ea litšebeletso tsa likopo tse sebetsang
mosebetsi_log - tafole ea ts'ebetso ea ts'ebetso
trap_oid — tafole ya tshebeletso ya sefi
Mothati oa 1 - bokella lintlha tsa lipalo-palo mabapi le ts'ebetso le ho amohela litlaleho
Tafole e sebelisoa ho boloka lintlha tsa lipalo-palo pg_stat_history
pg_stat_history sebopeho sa tafole
Lethathamo la "public.pg_stat_history" Kholomo | Mofuta | Liphetoho ------------------------------------+------------ ------------------------------ id | palo | not null default nextval('pg_stat_history_id_seq'::regclass) snapshot_timestamp | timestamp ntle le sebaka sa nako | database_id | palo | dbid | holo | userid | holo | botsa | kholo | botsa | mongolo | mehala | kholo | kakaretso_nako | ho nepahala habeli | nako_nako | ho nepahala habeli | max_time | ho nepahala habeli | nako_nako | ho nepahala habeli | stddev_time | ho nepahala habeli | mela | kholo | shared_blks_hit | kholo | kopanetsweng_blks_bala | kholo | kopanetsweng_blks_dirtied | kholo | kopanetsoe_blks_e ngotsoe | kholo | local_blks_hit | kholo | local_blks_bala | kholo | local_blks_dirtied | kholo | local_blks_written | kholo | temp_blks_bala | kholo | temp_blks_written | kholo | blk_bala_nako | ho nepahala habeli | blk_write_time | ho nepahala habeli | baseline_id | palo | Li-Index: "pg_stat_history_pkey" PRIMARY KEY, btree (id) "database_idx" btree (database_id) "queryid_idx" btree (queryid) "snapshot_timestamp_idx" btree (snapshot_timestamp) Litšitiso tsa lintlha tse tsoang kantle ho naha REIGbase (REIGbase data constraints) REIGbase_database NCES database(id ) HO HLAKOLA CASCADE
Joalo ka ha u bona, tafole e mpa feela e le data e bokellaneng ea pono pg_stat_statements polokelongtshedimosetso eo o e batlang.
Ho sebelisa tafole ena ho bonolo haholo
pg_stat_history e tla emela lipalo-palo tse bokelletsoeng tsa lipotso tsa hora ka 'ngoe. Qalong ea hora e 'ngoe le e' ngoe, ka mor'a ho tlatsa tafole, lipalo-palo pg_stat_statements tsosolosa ka pg_stat_statements_reset().
Ela hloko: Lipalo-palo li bokelloa bakeng sa lipotso tse nang le nako ea ho sebetsa e fetang motsotsoana o le mong.
Ho hlahisa tafole ea 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;Ka lebaka leo, ka mor'a nako e itseng tafoleng pg_stat_history re tla ba le sete ea linepe tsa litaba tsa tafole pg_stat_statements database ea sepheo.
Ehlile e tlaleha
U sebelisa lipotso tse bonolo, u ka fumana litlaleho tse molemo le tse monate.
Lintlha tse kopaneng tsa nako e itseng
Kopa
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 ;DB Nako
ho_char(nako '1 millisecond' * pg_total_stat_history_rec.total_time, 'HH24:MI:SS.MS')
I/O Nako
ho_char(nako '1 millisecond' * ( pg_total_stat_history_rec.blk_read_time + pg_total_stat_history_rec.blk_write_time ), 'HH24:MI:SS.MS')
TOP10 SQL by total_time
Kopa
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 KA NAKO E KAOFELA YA PHETHAHATSO | #| potso| mehala| letsetsa %| kakaretso_nako (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 ka kakaretso ea nako ea I/O
Kopa
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 KA PALOMOKA YA I/O NAKO | #| potso| mehala| letsetsa %| Nako ea I/O (ms)|db I/O nako % +----+-------------------------------- -----------+--------------------------------+----- ------ -- | 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 ka nako e telele ea ts'ebetso
Kopa
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 BY MAX PHETHAHATSO NAKO | #| senepe| snapshotID| potso| 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 ka SHARED buffer bala/ngola
Kopa
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 BALA/NGOLA | #| senepe| snapshotID| potso| li-blocks tse arolelanoang li baloa| li-blocks tse arolelanoang ngola +----+-------------------------------------------- -+-------------------------------------------- | 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 ------------------------------------------------ -------------------------------------------
Histogram ea ho ajoa ha likopo ka nako e phahameng ea ts'ebetso
Likopo
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 | KAOFELA EA LIPITSO: 33851920 | NAKO EA MOTSOALLE: 00:00:01.063 | MAX NAKO: 00:02:01.869 ------------------------------------------- ---------------------------------------- | nako e nyane| nako e telele| mehala +------------------------------------------------ ---------------------+----------- | 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
TOP10 Snapshots ka Potso ka Motsotsoana
Likopo
--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
|----------------------------------------------- - --------------------------------------------- | TOP10 Snapshots e hlophisitsoeng ke linomoro tsa QueryPerSeconds -------------------------------------------- ------------------------------------------------- ------------------------------------------------- | #| senepe| snapshotID| mehala| kakaretso ea dbtime| QPS| Nako ea I/O| Ke/O nako % +-----+--------------------------------------- ----+--------------------------------------------- -+------------------------+------------- 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
Nalane ea Phethahatso ea Hora e nang le QueryPerSeconds le Nako ea I/O
Kopa
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
Mongolo oa likhetho tsohle tsa SQL
Kopa
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
Phello
Joalokaha u bona, u sebelisa mekhoa e bonolo, u ka fumana leseli le lengata mabapi le boima ba mosebetsi le boemo ba database.
Hlokomela:Haeba re rekota potso lipotsong, re tla fumana nalane bakeng sa potso e fapaneng (ho boloka sebaka, litlaleho tsa potso e fapaneng li siiloe).
Kahoo, lintlha tsa lipalo-palo mabapi le ts'ebetso ea lipotso lia fumaneha ebile lia bokelloa.
Mokhahlelo oa pele oa "pokello ea lintlha tsa lipalo-palo" o phethiloe.
U ka fetela mohatong oa bobeli - "ho theha metrics ea ts'ebetso".
Empa ke pale e fapaneng ka ho felletseng.
E tla ntšetsoa pele…
Source: www.habr.com