Injineli - iguqulelwe ukusuka kwisiLatini - iphefumlelwe.
Injineli ingenza nantoni na. (c) R. Idizili.
Ii-Epigraphs.
Okanye ibali malunga nokuba kutheni umlawuli wedatha kufuneka akhumbule inkqubo yakhe yangaphambili.
I ngcaciso
Onke amagama atshintshiwe. Iziganeko ezenzeka ngokungalindelekanga ziyenzeka ngokungacwangciswanga. Isixhobo simele uluvo lobuqu lombhali kuphela.
Isiqinisekiso sewaranti: Uluhlu olucwangcisiweyo lwamanqaku aluyi kuba nenkcazo ecacileyo nechanekileyo yeetheyibhile kunye nezikripthi ezisetyenzisiweyo. Izinto ezisetyenziswayo azinakusetyenziswa ngokukhawuleza βNJENGOKO ZINJALOβ.
Okokuqala, ngenxa yomthamo omkhulu wezinto eziphathekayo,
okwesibini, ngenxa yobudlelwane obusondeleyo kunye nesiseko semveliso yomthengi wangempela.
Ngoko ke, amanqaku aya kuba neengcamango kunye neenkcazo kuphela kwifom eqhelekileyo.
Mhlawumbi kwixesha elizayo inkqubo iya kukhula ukuya kwinqanaba lokuthunyelwa kwi-GitHub, okanye mhlawumbi akunjalo. Ixesha liya kubonakala.
Ukuqala kwebali - "Β».
Kwenzeka ntoni ngenxa yoko, ngokwemiqathango eqhelekileyo - "Β»
Kutheni ndifuna konke oku?
Ewe, okokuqala, ukuze ungalibali, ukukhumbula iintsuku ezizukileyo zomhlalaphantsi.
Okwesibini, kukulungelelanisa oko kubhaliweyo. Kuba ngamanye amaxesha ndiqala ukubhideka ndilibale iindawo ezithile.
Ewe, kwaye eyona nto ibalulekileyo kukuba inokuba luncedo emntwini kwaye ibancede banqande ukuphinda baqalise ivili kwaye bangaqokeleli iraki. Ngamanye amazwi, phucula i-karma yakho (hayi iKhabrov). Kuba eyona nto ixabisekileyo kweli hlabathi ziimbono. Into ephambili kukufumana ingcamango. Kodwa ukuguqula ingcamango ibe yinyani ngumbuzo wezobugcisa kuphela.
Ke, masiqale, kancinci kancinci...
Ukuqulunqwa kwengxaki.
Iyafumaneka:
I-database ye-PostgreSQL (10.5), uhlobo lomthwalo oxutyiweyo (OLTP + DSS), umthwalo wokukhanya ophakathi, obekwe kwilifu le-AWS.
Akukho kubekwa esweni kweziseko zophuhliso kubonelelwe ngohlobo lwezixhobo eziqhelekileyo ze-AWS kubume obuncinci.
Iyafuneka:
Beka esweni ukusebenza kunye nobume besiseko sedatha, fumana kwaye ube nolwazi lokuqala lokuphucula imibuzo enzima yedatha.
Intshayelelo emfutshane okanye uhlalutyo lweenketho zesisombululo
Ukuqala, makhe sizame ukuhlalutya iinketho zokusombulula ingxaki ngokwembono yocazululo lokuthelekisa iingenelo kunye nokungeloncedo kwinjineli, kwaye abo banelungelo kuyo ngokweshedyuli yabasebenzi bajongane neenzuzo kunye nokungalunganga. ilahleko yolawulo.
Ukhetho 1 - "Ukusebenza ngokwemfuno"
Sishiya yonke into njengoko injalo. Ukuba umthengi akanelisekanga ngento ethile ekusebenzeni, ukusebenza kwesiseko sedatha okanye isicelo, uya kwazisa iinjineli ze-DBA nge-imeyile okanye ngokudala isiganeko kwi-tray yetikiti.
Injineli, ifumene isaziso, iya kuqonda ingxaki, inike isisombululo okanye ibeke ingxaki kwi-burner yangasemva, ngethemba lokuba yonke into iya kusombulula ngokwayo, kwaye yonke into iya kulibaleka ngokukhawuleza.
I-gingerbread kunye nama-donuts, amanxeba kunye namaqhumaIsonka seGinger kunye needonuts:
1. Akukho mfuneko yokwenza nantoni na eyongezelelweyo.
2. Kuhlala kukho ithuba lokuzithethelela kwaye ujike.
3. Ixesha elininzi onokuthi ulichithe ngokubona kwakho.
Amanxeba kunye namaqhuma:
1. Kungekudala okanye kamva, umthengi uya kucinga ngokubaluleka kobukho kunye nobulungisa behlabathi jikelele kwaye aphinde azibuze umbuzo - kutheni ndibahlawula imali yam? Isiphumo sihlala siyafana - umbuzo kuphela kuxa umthengi eza kuba nesithukuthezi kwaye awangawangise ngokuba ndlelantle. Kwaye i-feeder iya kuba ingenanto. Kubuhlungu.
2. Uphuhliso lobunjineli - zero.
3. Ubunzima bokucwangcisa umsebenzi kunye nokulayisha
Ukhetho 2- "Ukudanisa ngeentambula, ukuphunga kunye nokunxiba izihlangu"
Umhlathi woku-1-Kutheni sifuna inkqubo yokubeka iliso, siya kufumana yonke into kunye nezicelo. Siqhuba inkitha yazo zonke iintlobo zemibuzo kwisichazi-magama sedatha kunye neembono eziguqukayo, silayita zonke iintlobo zezinto zokubala, sibeka yonke into kwiitafile, kwaye ngamaxesha athile sihlalutya uluhlu kunye neetheyibhile. Ngenxa yoko, sineegrafu ezintle okanye ezingezizo ezintle, iitafile, iingxelo. Into ephambili kukuba ube ngaphezulu, ngaphezulu.
Umhlathi woku-2-Sivelisa umsebenzi kwaye siqalise uhlalutyo lwayo yonke le nto.
Umhlathi woku-3-Silungiselela uxwebhu oluthile, silubiza olu xwebhu, ngokulula - "kufuneka silungiselele njani isiseko sedatha."
Umhlathi woku-4-Umthengi, ebona bonke obu bukhazikhazi beegrafu kunye namanani, usebuntwaneni, ukuzithemba ngokungenangqondo - ngoku yonke into iya kusisebenzela, kungekudala. Kwaye, uye ahlukane ngokulula nangoncedo lwemali. Abaphathi baqinisekile ukuba iinjineli zethu zisebenza kakuhle. Ilayisha ngobuninzi.
Umhlathi woku-5-Phinda iNyathelo loku-1 rhoqo.
I-gingerbread kunye nama-donuts, amanxeba kunye namaqhumaIsonka seGinger kunye needonuts:
1. Ubomi babaphathi kunye neenjineli bulula, bunokuqikelelwa kwaye buzaliswe ngumsebenzi. Yonke into iyangxola, wonke umntu uxakekile.
2. Ubomi bomthengi nabo abubi - uhlala eqinisekile ukuba kufuneka abe nomonde kancinane kwaye yonke into iya kusebenza. Ayilunganga, ke, ihlabathi alinabulungisa, kubomi obulandelayo uya kuba nethamsanqa.
Amanxeba kunye namaqhuma:
1. Kungekudala okanye kamva, kuya kubakho umboneleli okhawulezayo wenkonzo efanayo oya kwenza into efanayo, kodwa ngexabiso eliphantsi. Kwaye ukuba isiphumo siyafana, kutheni uhlawula ngaphezulu. Okuya kuphinda kukhokhelele ekulahlekeni kwe-feeder.
2. Iyadika. Indlela ekruqula ngayo nawuphi na umsebenzi ongenantsingiselo.
3. Njengoko kuguqulelo lwangaphambili, akukho phuhliso. Kodwa kwinjineli, i-downside kukuba, ngokungafaniyo nokhetho lokuqala, kufuneka uhlale uvelisa i-IBD. Kwaye oku kuthatha ixesha. Onokuyichitha ukuze kuxhamle lowo umthandayo. Ngenxa yokuba awukwazi ukuzinyamekela, akukho mntu unikezela malunga nawe.
Inketho yesi-3-Akuyomfuneko ukuba uyile ibhayisekile, kufuneka uyithenge kwaye uyikhwele.
Akunanto yokuba iinjineli ezivela kwezinye iinkampani zidla i-pizza kunye nobhiya (oh, iintsuku ezizukileyo zaseSt. Petersburg kwi-90). Masisebenzise iisistim zokubek' esweni ezenziweyo, ezilungisiweyo nezisebenzayo, kunye nenzuzo yokuthetha ngokubanzi (kakuhle, kubadali bazo).
I-gingerbread kunye nama-donuts, amanxeba kunye namaqhumaIsonka seGinger kunye needonuts:
1. Akukho mfuneko yokuchitha ixesha ngokuza nento esele iyilwe. Yithabathe kwaye uyisebenzise.
2. Iinkqubo zokubeka iliso azibhalwanga zizidenge kwaye, ngokuqinisekileyo, ziluncedo.
3. Iisistim zokubeka iliso ezisebenzayo zihlala zibonelela ngolwazi oluluncedo oluhluziweyo.
Amanxeba kunye namaqhuma:
1. Injineli kule meko ayikho injineli, kodwa ngumsebenzisi wemveliso yomnye umntu.
2. Umthengi kufuneka aqiniseke ngesidingo sokuthenga into ethi, ngokuqhelekileyo, akafuni ukuqonda, kwaye akufanelekanga, kwaye ngokubanzi uhlahlo lwabiwo-mali lonyaka luvunyiwe kwaye aluyi kutshintsha. Emva koko kufuneka unikeze isibonelelo esahlukileyo kwaye ulungiselele inkqubo ethile. Ezo. okokuqala kufuneka uhlawule, uhlawule kwaye uhlawule kwakhona. Kwaye umthengi uyancwina. Oku kuqhelekile kobu bomi.
Yintoni enokuyenza - eChernyshevsky? Umbuzo wakho ubaluleke kakhulu. (Nge)
Kule meko kunye nemeko yangoku, ungayenza ngokwahlukileyo kancinci - masenze eyethu inkqubo yokubeka iliso.
Ewe, hayi inkqubo, ewe, ngengqiqo epheleleyo yegama, ekhwaza kakhulu kwaye ekhukhumele, kodwa ubuncinci ngandlela thile yenza umsebenzi wakho ube lula kwaye uqokelele ulwazi oluninzi ukusombulula izehlo zokusebenza. Ukuze ungazifumani kwimeko - "hamba apho, andazi apho, fumana into, andazi ukuba yintoni."
Zeziphi izinto eziluncedo nezingalunganga zolu khetho:
Iinkonzo:
1. Oku kunomdla. Ewe, ubuncinci inika umdla ngakumbi kunokuhlala "ucutha ifayile yedatha, guqula indawo yetafile, njl.njl."
2. Ezi zizakhono ezintsha kunye nophuhliso olutsha. Yiyiphi, kungekudala okanye kamva, iya kukunika i-gingerbread efanelekileyo kunye nama-donuts.
Umgcini:
1. Kuya kufuneka usebenze. Sebenza nzima.
2. Kuya kufuneka uchaze rhoqo intsingiselo kunye namathemba ayo yonke imisebenzi.
3. Kuya kufuneka ukuba kubingelelwe into ethile, kuba ekuphela kwesixhobo esifumanekayo kwinjineli - ixesha - lilinganiselwe yi-Universe.
4. Eyona nto imbi kakhulu nengathandekiyo - isiphumo sinokuba bullshit njengokuthi "Hayi impuku, hayi isele, kodwa isilwanyana esingaziwayo."
Abo bangathathi ingozi abayiseli i-champagne.
Ngoko-ulonwabo luqala.
Uluvo ngokubanzi - ngokwezicwangciso
(Umfanekiso othathwe kwinqaku «»)
Ingcaciso:
- Ulwandiso oluqhelekileyo lwePostgreSQL βpg_stat_statementsβ lufakwe kwindawo ekujoliswe kuyo.
- Kwisiseko sedatha yokubeka iliso, senza uluhlu lweetafile zenkonzo ukugcina i-pg_stat_statements imbali kwinqanaba lokuqala kunye nokuqwalasela i-metrics kunye nokubeka iliso kwixesha elizayo.
- Kwi-host host esweni, senza isethi yezikripthi ze-bash, kubandakanywa nezo zokuvelisa iziganeko kwinkqubo yetikiti.
Iitafile zenkonzo
Okokuqala, i-ERD eyenziwe lula, yintoni eyenzekayo ekugqibeleni:
Inkcazo emfutshane yeetheyibhilei siphelo β umamkeli, indawo yoqhagamshelo kumzekelo
sedata -iparamitha zedatabase
pg_stat_history -itheyibhile yembali yokugcina imifanekiso yethutyana ye pg_stat_statements imboniselo yedatabase ekujoliswe kuyo
metric_glossary - Isichazi-magama semetriki zokusebenza
metric_config - ulungelelwaniso lweemetrics zomntu ngamnye
i-metric - i-metric ethile yesicelo esibekwe esweni
metric_alert_imbali - imbali yezilumkiso zokusebenza
log_query -Itafile yenkonzo yokugcina iirekhodi ezicazululiweyo kwifayile yelog yePostgreSQL ekhutshelwe kwi-AWS
siseko - iiparamitha zamaxesha asetyenziswa njengesiseko
indawo yokujonga β ulungelelwaniso lweemetrics zokukhangela ubume bedatabase
indawo yokujonga_isilumkiso_kwimbali - Imbali elumkisayo yeemethrikhi zokujonga impilo yedatha
pg_stat_db_queries β Itheyibhile yenkonzo yezicelo ezisebenzayo
umsebenzi_log β itheyibhile yenkonzo yelog yomsebenzi
trap_oid β itheyibhile yolungelelwaniso lomgibe
Inqanaba 1 - ukuqokelela ulwazi lwamanani malunga nokusebenza kunye nokufumana iingxelo
Itheyibhile isetyenziselwa ukugcina ulwazi lwamanani pg_stat_history
pg_stat_history table structure
Itheyibhile "public.pg_stat_history" Umhlathi | Uhlobo | Izilungisi -------------------------------------------------- ------------------------------ id | inani elipheleleyo | ayilulutho olungagqibekanga olumiselweyo ('pg_stat_history_id_seq'::regclass) istampu_yexesha | isitampu sexesha ngaphandle kwendawo yexesha | iid_yesiseko | inani elipheleleyo | dbid | othi | umsebenzisiid | othi | umbuzo | mkhulu | umbuzo | umbhalo | iminxeba | mkhulu | ixesha_lilonke | ukuchaneka kabini | ixesha_lomzuzu | ukuchaneka kabini | ixesha_eliphezulu | ukuchaneka kabini | ixesha_eliphakathi | ukuchaneka kabini | stddev_ixesha | ukuchaneka kabini | imiqolo | mkhulu | kwabelwana_blks_hit | mkhulu | kwabelwana_blks_funda | mkhulu | kwabelwana_blks_dirtied | mkhulu | kwabelwana_blks_kubhaliwe | mkhulu | local_blks_hit | mkhulu | local_blks_funda | mkhulu | local_blks_dirtied | mkhulu | local_blks_ibhalwe | mkhulu | temp_blks_funda | mkhulu | temp_blks_ebhaliweyo | mkhulu | blk_funda_ixesha | ukuchaneka kabini | blk_bhala_ixesha | ukuchaneka kabini | isiseko_iid | inani elipheleleyo | Izalathisi: "pg_stat_history_pkey" PRIMARY KEY, btree (id) "database_idx" btree (database_id) "queryid_idx" btree (queryid) "snapshot_timestamp_idx" btree (snapshot_timestamp) Izithintelo zesitshixo sangaphandle (i-database_FEIG) i-database ye-REIGRE_ID idatabase(id ) NGENXA YE-CASCADE
Njengoko ubona, itafile yidatha yokujonga eyongezelekayo pg_stat_statements kwindawo ekujoliswe kuyo.
Ukusebenzisa le theyibhile kulula kakhulu
pg_stat_history iya kubonisa iinkcukacha-manani eziqokelelweyo zokwenziwa kombuzo ngeyure nganye. Ekuqaleni kweyure nganye, emva kokuzalisa itafile, izibalo pg_stat_statements phinda usete nge pg_stat_statements_reset().
Qaphela: Amanani-manani aqokelelwa kwimibuzo kunye nokuphunyezwa kwexesha elingaphezu kwe-1 yesibini.
Ukukhupha i pg_stat_history table
--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;Ngenxa yoko, emva kwexesha elithile kwitheyibhile pg_stat_history siya kuba neseti yezifinyezo zeziqulatho zetafile pg_stat_statements idatabase ekujoliswe kuyo.
Ngokwenene ukunika ingxelo
Ukusebenzisa imibuzo elula, unokufumana iingxelo eziluncedo nezinomdla.
Idatha edityanisiweyo yexesha elithile
Isicelo
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 ;Ixesha le-DB
uku_char(ikhefu '1 millisecond' * pg_total_stat_history_rec.total_time, 'HH24:MI:SS.MS')
I/O Ixesha
ukuya_char(ikhefu '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
Isicelo
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 NGEXESHA LONKE LOKUSEBENZA | #| umbuzo| iminxeba | iminxeba %| Ixesha_lilonke (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 ngexesha I/O iyonke
Isicelo
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 NGELONKE I/O IXESHA | #| umbuzo| iminxeba | iminxeba %| I/O ixesha (ms)|db I/O ixesha % +----+-------------------------------- --------------------------------------------+----- ------ -- | 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 ngexesha max uphumezo
Isicelo
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 NGEXESHA LOKUPHUMA MAX | #| umfanekiso | i-snapshotID| umbuzo| ixesha_elininzi (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 ngu-SHARED buffer ukufunda/ukubhala
Isicelo
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 NGOKWABELANA NGE-BUFFER FUNDA/BHALA | #| umfanekiso | i-snapshotID| umbuzo| iibhloko ekwabelwana ngazo funda| iibhloko ekwabelwana ngazo bhala +----+--------------------------------------------- -+--------------------------------------------- 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 ------------------------------------------------ -------------------------------------------
I-Histogram yokusasazwa kwezicelo ngelona xesha liphezulu lokuphumeza
Izicelo
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 | EZIYONKE IZICELO: 33851920 | IXESHA LOMNTU: 00:00:01.063 | UMAX IXESHA: 00:02:01.869 ------------------------------------------ ---------------------------------------- | ubude bexesha| ubude bexesha| iminxeba +------------------------------------------------- ---------------------+----------- | 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 ngumbuzo ngeSekondi nganye
Izicelo
--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 eziodolwe ngamanani QueryPerSeconds -------------------------------------------- ------------------------------------------------- ------------------------------------------------- | #| umfanekiso | i-snapshotID| iminxeba | ixesha lilonke db| QPS| I/O ixesha| I/O ixesha% +-----+--------------------------------------- --------------------------------------+---------- -+------------------------+------------- 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 | 6:04.04.2019:14( 00 ms.)| 4137 | 2397326:00:04( 43.033 ms.)| .283033.854 | 665.924 | 00/00/00.024 24.505:009 | 7 | 04.04.2019 | 15:00:4139( 2394416 ms.)| 00 | 04:51.435:291435.010(665.116 ms.)| .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 | 4167:4387191:00( 06 ms.)| 51.380 | 411380.293:609.332:00( 05 ms.)| .18.847 | 318847.407 | 77.507/10/04.04.2019 18:01 | 4157 | 1145596| 00:01:19.217( 79217.372 ms.)| 313.004 | 00:00:01.319( 1319.676 ms.)| 1.666 | XNUMX | XNUMX/XNUMX/XNUMX XNUMX:XNUMX | XNUMX | XNUMX| XNUMX:XNUMX:XNUMX( XNUMX ms.)| XNUMX| XNUMX:XNUMX:XNUMX( XNUMX ms.)| XNUMX
Imbali yoKwenziwa kweyure kunye ne-QueryPerSeconds kunye ne-I/O Ixesha
Isicelo
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
Okubhaliweyo kuzo zonke i-SQL-khetha
Isicelo
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
Isiphumo
Njengoko ubona, usebenzisa iindlela ezilula, unokufumana ulwazi oluninzi oluluncedo malunga nomthwalo womsebenzi kunye nemeko yesiseko sedatha.
Phawula:Ukuba sirekhoda umbuzo kwimibuzo, siya kufumana imbali yombuzo owahlukileyo (ukwenzela ukugcina indawo, iingxelo zombuzo owahlukileyo azifakwanga).
Ke, idatha yeenkcukacha-manani malunga nokusebenza kombuzo iyafumaneka kwaye iqokelelwe.
Inqanaba lokuqala "lokuqokelelwa kwedatha yeenkcukacha-manani" ligqityiwe.
Unokudlulela kwinqanaba lesibini - "ukuseta imilinganiselo yokusebenza".
Kodwa eli libali elahlukileyo ngokupheleleyo.
Iza kuqhubekaβ¦
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