Moenjiniere - e fetoletsoeng ho tloha Selatine - e bululetsoeng.
Moenjiniere a ka etsa tsohle. (c) R. Disele.
Epigraphs.
Kapa pale e mabapi le hore na ke hobane'ng ha molaoli oa polokelo ea boitsebiso a lokela ho hopola nako ea hae ea nakong e fetileng e le setsebi sa mananeo.
Tlhaloso
Mabitso ohle a fetotsoe. Ho iketsahalla feela ka tšohanyetso. 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. Lisebelisoa li ke ke tsa sebelisoa hang-hang "AS IS".
Taba ea pele, ka lebaka la bongata ba lintho tse bonahalang.
ea bobeli, ka lebaka la ho tsepamisa maikutlo ho setsi sa tlhahiso ea moreki oa sebele.
Ka hona, lihlooho li tla ba le maikutlo le litlhaloso ka mokhoa o tloaelehileng ka ho fetisisa feela.
Mohlomong nakong e tlang sistimi e tla hola ho fihla boemong ba ho romella ho GitHub, kapa mohlomong che. Nako e tla bolela.
Tšimoloho ea pale - "".
Se etsahetseng ka lebaka leo, ka mantsoe a akaretsang - "»
Hobaneng ke hloka see sohle?
Hantle, pele ho tsohle, e le hore ke se ke ka lebala, ho hopola matsatsi a khanyang a ho tlohela mosebetsi.
Ea bobeli, ho hlophisa se ngotsoeng. Hobane ka linako tse ling le 'na ke qala ho ferekana le ho lebala likarolo tsa motho ka mong.
Hantle, 'me ntho ea bohlokoa ka ho fetisisa - mohlomong e tla ba molemo ho motho e mong' me e tla thusa ho se qale ho tsosolosa lebili le ho se bokelle rakes. Ka mantsoe a mang, ho ntlafatsa karma ea hau (eseng ea Habr). Hobane, ntho ea bohlokoahali lefatšeng lena ke mehopolo. Ntho e ka sehloohong ke ho fumana maikutlo. 'Me ho hlokomela mohopolo hore e be' nete e se e ntse e le potso ea botekgeniki feela.
Kahoo, ha re qaleng, hanyane ka hanyane ...
Polelo ea bothata.
E teng:
Database ea PostgreSQL (10.5), mojaro o kopaneng oa mosebetsi (OLTP + DSS), mojaro o tlase o mahareng, o lerung la AWS.
Ha ho ts'ebetso ea database; tlhokomelo ea litšebeletso tsa motheo e fanoa ka mokhoa oa lisebelisoa tse tloaelehileng tsa AWS ka tlhophiso e fokolang.
E ea hlokahala:
Lekola ts'ebetso ea database le bophelo bo botle, fumana 'me u be le tlhaiso-leseling ea pele 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 lokelang ho sebetsana le melemo le tahlehelo ea botsamaisi ho latela kemiso ea basebetsi ba sebetsane le bona.
Khetho ea 1 - "Ho sebetsa ka tlhokahalo"
Re tlohela tsohle joalo ka ha li le joalo. Haeba moreki a sa khotsofatsoe ke ho hong ho ts'ebetsong, ts'ebetsong ea database kapa ts'ebeliso, o tla tsebisa lienjiniere tsa DBA ka lengolo-tsoibila kapa ka ho theha ketsahalo tekete.
Moenjiniere, ha a se a fumane tsebiso, o tla rarolla 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, 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 fana ka mabaka le shirk.
3. Nako e ngata ea ho qeta kamoo u batlang kateng.
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 ba lefa chelete ea ka bakeng sa eng? Sephetho se lula se tšoana - potso ke ha moreki a tla teneha 'me a lumelise hantle. Mme sekoti se tla be se se na letho. Sena se bohloko.
2. Nts'etsopele ea moenjiniere ke zero.
3. Mathata a ho rera mosebetsi le ho kenya
Khetho ea 2 - "Re tantša ka meropa, re rekisa le lieta"
Ntlha ea 1-Hobaneng re hloka mokhoa oa ho beha leihlo? Re tla fumana tsohle ka likopo. Ke qala sehlopha sa likopo ho bukana ea data le lipono tse matla, ke bulela mefuta eohle ea li-counters, fokotsa ntho e 'ngoe le e' ngoe ho ea litafole, nako le nako ke sekaseka manane le litafole. Ka lebaka leo, re na le li-graph tse ntle kapa tse seng ntle haholo, litafole, litlaleho. Ntho e ka sehloohong ke hore ho feta, ho feta.
Ntlha ea 2-Re hlahisa ketsahalo - re qala tlhahlobo ea tsena tsohle.
Ntlha ea 3-Re lokisa tokomane e itseng, tokomane ena re e bitsa feela - "mokhoa oa ho theha database".
Ntlha ea 4- Moreki, ha a bona botle bona bohle ba lirafshoa le lipalo, o na le ts'epo ea bohlanya ea bana - joale tsohle li tla re sebeletsa haufinyane. 'Me, ha bonolo le ho se utloise bohloko, o arohana le lichelete tsa hae tsa lichelete. Batsamaisi ba boetse ba itšepa - baenjiniere ba rona ba sebetsa hantle. Mosebetsi o moholo ka ho fetisisa.
Ntlha ea 5-Pheta Ntlha ea 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 na le bonnete ba hore o hloka ho ba le mamello ho se hokae mme tsohle li tla loka. Haeba e sa sebetse, hantle, lefats'e ha le na toka, o tla ba lehlohonolo bophelong bo latelang.
Matetetso le maqeba:
1. Haufinyane, ho tla ba le morekisi ea potlakileng oa ts'ebeletso e ts'oanang ea tla etsa se tšoanang, empa ka theko e tlase hanyane. 'Me haeba sephetho se tšoana, ke hobane'ng ha u lefa ho feta. E tla boela e lebise ho nyamela ha sekoti.
2. Hoa tena. Joalo ka ketso efe kapa efe e hlokang moelelo o fokolang.
3. Joalo ka khetho e fetileng - ha ho nts'etsopele. Empa bakeng sa moenjiniere bothata ke hore, ho fapana le khetho ea pele, mona o hloka ho lula o hlahisa IBD. Mme sena se nka nako. E ka sebelisoang molemong oa hau. Hobane ha u sa itlhokomele, ha ho motho ea u tsotellang.
Khetho ea 3 - Ha ho hlokahale hore u iqapele baesekele, u hloka feela ho e reka le ho e palama.
Baenjiniere ba tsoang lik'hamphani tse ling ba ja pizza 'me ba e hlatsoa ka biri ka lebaka (oh, linako tse khanyang tsa St. Petersburg lilemong tsa bo-90). Ha re sebeliseng litsamaiso tsa ho beha leihlo tse entsoeng, tse lokolotsoeng, le tse sebetsang, 'me ka kakaretso li tlisa melemo (bonyane, bonyane ho baetsi ba tsona).
Bohobe ba ginger le li-donuts, matetetso le maqebaBohobe ba ginger le li-donuts:
1. Ha ho hlokahale ho senya nako ka ho qapa ntho e seng e qapiloe. E nke 'me u e sebelise.
2. Litsamaiso tsa ho beha leihlo ha lia ngoloa ke maoatla ’me ka sebele li molemo.
3. Litsamaiso tse sebetsang tsa ho beha leihlo hangata li fana ka tlhahisoleseding e molemo e tlhotliloeng.
Matetetso le maqeba:
1. Moenjiniere tabeng ena hase moenjiniere, empa ke motho ea sebelisang sehlahisoa sa motho e mong. Kapa mosebedisi.
2. Moreki o hloka ho kholiseha ka tlhokahalo ea ho reka ntho eo ka kakaretso a sa batleng ho e utloisisa, le hore 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, ho se hlophisa bakeng sa sistimi e itseng. Ke hore, pele u 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 nepahetse haholo. (c)
Tabeng ena le boemo ba hajoale, o ka 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 buuoang ka lentsoe le phahameng le ho 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 seo, ha ke tsebe hore na ke eng."
Melemo le likotsi tsa khetho ena ke life:
Melemo:
1. Hoa thahasellisa. Hantle, bonyane ho thahasellisa ho feta "shrink datafile, alter tablespace, joalo-joalo."
2. Tsena ke litsebo tse ncha le nts'etsopele e ncha. Eo ka nako e telele e tlang ho fana ka gingerbread e loketseng le li-donuts kapele kapa hamorao.
Chelete:
1. U tla tlameha ho sebetsa. Sebetsa haholo.
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. Tse mpe ka ho fetisisa le tse sa thabiseng ka ho fetisisa - ka lebaka leo, u ka fumana ntho e kang "Eseng mouse, eseng senqanqane, empa phoofolo e sa tsejoeng."
Ea sa ipeheng kotsing ha a noe champagne.
Kahoo, karolo e thahasellisang ka ho fetisisa e 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.
- Sebakeng sa polokelo ea litaba, re theha lethathamo la litafole tsa lits'ebeletso ho boloka nalane ea pg_stat_statements qalong le ho hlophisa metrics le tlhahlobo nakong e tlang.
- Ho moamoheli ea behang leihlo, re theha sete ea mangolo a bash, ho kenyeletsoa le ho hlahisa liketsahalo ho sistimi ea litekete.
Litafole tsa litšebeletso
Ho qala, ERD e nolofalitsoeng ea moralo, seo re se fumaneng qetellong:
Tlhaloso e khuts'oane ea litafoleqetello - moamoheli, sebaka sa khokahano ho mohlala
polokelongtshedimosetso - li-parameter tsa database
pg_stat_history - tafole ea nalane bakeng sa ho boloka linepe tsa nakoana tsa pg_stat_statements pono ea polokelong ea polokelo
metric_glossary — bukantswe ya metrics tshebetso
metric_config - tlhophiso ea metrics ea motho ka mong
metric - metric e ikhethileng bakeng sa potso e ntseng e beiloe leihlo
metric_alert_histori - nalane ea litemoso tsa ts'ebetso
log_query - tafole ea lisebelisoa bakeng sa ho boloka lirekoto tse arotsoeng ho tsoa ho faele ea log ea PostgreSQL e jarollotsoeng ho tsoa ho AWS
motheo - mekhahlelo ea nako e sebelisoang e le motheo
sebaka sa ho hlahloba - tlhophiso ea metrics ea tlhahlobo ea bophelo bo botle ba database
checkpoint_alert_histori - nalane ea litemoso tsa tlhahlobo ea bophelo bo botle ba database
pg_stat_db_queries — tafole ea litšebeletso tsa likopo tse sebetsang
mosebetsi_log - tafole ea lits'ebeletso tsa lethathamo la ts'ebetso
trap_oid — tafole ya tshebeletso ya sefi
Mohato oa 1 - Bokella lipalo-palo tsa ts'ebetso 'me u hlahise litlaleho
Tafole e sebelisoa ho boloka lintlha tsa lipalo-palo. pg_stat_history
Sebopeho sa tafole ea pg_stat_history
Lethathamo la "public.pg_stat_history" Kholomo | Mofuta | Liphetoho --------------------------------------------------------------------------------------------- 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 | nako_max | 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 tsa kantle ho naha "kfNID ea data ea kantle ho naha"KfNID (database_id) REFERENCES database(id) HO HLAKOLA CASCADEJoalokaha u ka bona, tafole ke pono e akaretsang ea data. 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 hore tafole e tlatsoe, lipalo-palo pg_stat_statements tsosolosa ka pg_stat_statements_reset().
Ela hloko: Lipalopalo li bokelloa bakeng sa lipotso tse nkang nako e fetang motsotsoana ho etsoa.
Ho tlatsa 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.
Tlaleho ea sebele
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) | dBame% + ----------------------------- +-------------------------------------- 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 %| I / o nako (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_Jime (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-block tsa lingoli li 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 ---------------------------------------------------------------------------------------
Histogram ea kabo ea lipotso ka nako e ngata ea ho phethahatsa
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| letsa 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 ka linomoro tsa QueryPerSeconds -------------------------------------------------------------------- --------------------------------------------------------------------- | #| senepe| snapshotID| mehala| kakaretso ea dbtime| QPS| Nako ea I/O| I / o nako ea% + ----- + ------------- + --------------------------------------------------------------------- 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, ka mekhoa e bonolo, u ka fumana leseli le lengata mabapi le boima ba mosebetsi le boemo ba database.
Hlokomela:Haeba u rekota potso likopong, u tla fumana nalane bakeng sa kopo e fapaneng (e le ho boloka sebaka, litlaleho tsa kopo e fapaneng li siiloe).
Kahoo, lintlha tsa lipalo-palo mabapi le ts'ebetso ea lipotso lia fumaneha ebile lia bokelloa.
Mohato oa pele, "ho bokella lintlha tsa lipalo-palo", o felile.
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
