Ukuqhubeka kwesihloko esithi β
I-athikili izohlola futhi ibonise, kusetshenziswa imibuzo ethile nezibonelo, ukuthi yiluphi ulwazi oluwusizo olungatholwa kusetshenziswa umlando wokubuka kwe-pg_locks.
Isexwayiso
Ngenxa yobusha besihloko kanye nesikhathi sokuhlola esingaqediwe, i-athikili ingase iqukethe amaphutha. Ukugxekwa nokuphawula kwamukeleka kakhulu futhi kulindelekile.
Idatha yokufaka
Umlando wokumelwa kwe-pg_locks
ukukhiya_ngomlando
CREATE TABLE archive_locking
( timepoint timestamp without time zone ,
locktype text ,
relation oid ,
mode text ,
tid xid ,
vtid text ,
pid integer ,
blocking_pids integer[] ,
granted boolean ,
queryid bigint
);
Empeleni, ithebula liyafana nethebula archive_pg_stat_activity, kuchazwe kabanzi lapha -
Ukuze ugcwalise ikholomu queryid umsebenzi uyasetshenziswa
update_history_locking_by_queryid
--update_history_locking_by_queryid.sql
CREATE OR REPLACE FUNCTION update_history_locking_by_queryid() RETURNS boolean AS $$
DECLARE
result boolean ;
current_minute double precision ;
start_minute integer ;
finish_minute integer ;
start_period timestamp without time zone ;
finish_period timestamp without time zone ;
lock_rec record ;
endpoint_rec record ;
current_hour_diff double precision ;
BEGIN
RAISE NOTICE '***update_history_locking_by_queryid';
result = TRUE ;
current_minute = extract ( minute from now() );
SELECT * FROM endpoint WHERE is_need_monitoring
INTO endpoint_rec ;
current_hour_diff = endpoint_rec.hour_diff ;
IF current_minute < 5
THEN
RAISE NOTICE 'Current time is less than 5 minute.';
start_period = date_trunc('hour',now()) + (current_hour_diff * interval '1 hour');
finish_period = start_period - interval '5 minute' ;
ELSE
finish_minute = extract ( minute from now() ) / 5 ;
start_minute = finish_minute - 1 ;
start_period = date_trunc('hour',now()) + interval '1 minute'*start_minute*5+(current_hour_diff * interval '1 hour');
finish_period = date_trunc('hour',now()) + interval '1 minute'*finish_minute*5+(current_hour_diff * interval '1 hour') ;
END IF ;
RAISE NOTICE 'start_period = %', start_period;
RAISE NOTICE 'finish_period = %', finish_period;
FOR lock_rec IN
WITH act_queryid AS
(
SELECT
pid ,
timepoint ,
query_start AS started ,
MAX(timepoint) OVER (PARTITION BY pid , query_start ) AS finished ,
queryid
FROM
activity_hist.history_pg_stat_activity
WHERE
timepoint BETWEEN start_period and
finish_period
GROUP BY
pid ,
timepoint ,
query_start ,
queryid
),
lock_pids AS
(
SELECT
hl.pid ,
hl.locktype ,
hl.mode ,
hl.timepoint ,
MIN ( timepoint ) OVER (PARTITION BY pid , locktype ,mode ) as started
FROM
activity_hist.history_locking hl
WHERE
hl.timepoint between start_period and
finish_period
GROUP BY
hl.pid ,
hl.locktype ,
hl.mode ,
hl.timepoint
)
SELECT
lp.pid ,
lp.locktype ,
lp.mode ,
lp.timepoint ,
aq.queryid
FROM lock_pids lp LEFT OUTER JOIN act_queryid aq ON ( lp.pid = aq.pid AND lp.started BETWEEN aq.started AND aq.finished )
WHERE aq.queryid IS NOT NULL
GROUP BY
lp.pid ,
lp.locktype ,
lp.mode ,
lp.timepoint ,
aq.queryid
LOOP
UPDATE activity_hist.history_locking SET queryid = lock_rec.queryid
WHERE pid = lock_rec.pid AND locktype = lock_rec.locktype AND mode = lock_rec.mode AND timepoint = lock_rec.timepoint ;
END LOOP;
RETURN result ;
END
$$ LANGUAGE plpgsql;
Incazelo: inani lekholomu ye-queryid libuyekezwa kuthebula_lokukhiya umlando, bese kuthi lapho kwakhiwa ukwahlukanisa okusha kwethebula_le-archive_locking, inani lizogcinwa kumanani omlando.
Umphumela
Ulwazi olujwayelekile ngezinqubo ngokujwayelekile.
LINDE IZIKHI NGEZINHLOBO
Uphenyo
WITH
t AS
(
SELECT
locktype ,
mode ,
count(*) as total
FROM
activity_hist.archive_locking
WHERE
timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
NOT granted
GROUP BY
locktype ,
mode
)
SELECT
locktype ,
mode ,
total * interval '1 second' as duration
FROM t
ORDER BY 3 DESC
Isibonelo:
| KULINDE IZIKHIWO NGEZINHLOBO ZOKUKHILWA +-----------+---------------------------------------------------------------- ------------------- | uhlobo lokukhiya| imodi| ubude besikhathi +----------------------------------------------- - ----------------------- | transactionid| ShareLock| 19:39:26 | isiqephu| AccessExclusiveLock| 00:03:35 +-------------------+------------------------ - -------+-----------
UKUTHATHA IZIKHI NGEZINHLOBO
Uphenyo
WITH
t AS
(
SELECT
locktype ,
mode ,
count(*) as total
FROM
activity_hist.archive_locking
WHERE
timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
granted
GROUP BY
locktype ,
mode
)
SELECT
locktype ,
mode ,
total * interval '1 second' as duration
FROM t
ORDER BY 3 DESC
Isibonelo:
| UKUTHATHA IZIKHI NGEZINHLOBO ZOKUKHIWA +--------------------------------------------- --------+------------------- | uhlobo lokukhiya| imodi| ubude besikhathi +----------------------------------------------- - ----------------------- | ubudlelwano| RowExclusiveLock| 51:11:10 | virtualxid| I-ExclusiveLock| 48:10:43 | transactionid| I-ExclusiveLock| 44:24:53 | ubudlelwano| AccessShareLock| 20:06:13 | isiqephu| AccessExclusiveLock| 17:58:47 | isiqephu| I-ExclusiveLock| 01:40:41 | ubudlelwano| ShareUpdateExclusiveLock| 00:26:41 | into| RowExclusiveLock| 00:00:01 | transactionid| ShareLock| 00:00:01 | nwebisa| I-ExclusiveLock| 00:00:01 +-------------------+----------------------- - -------+-----------
Ulwazi oluningiliziwe ngezicelo ezithile ze-queryid
KULINDE IZIKHI NGEZINHLOBO ZOKUSHIYA NGE-QUERYID
Uphenyo
WITH
lt AS
(
SELECT
pid ,
locktype ,
mode ,
timepoint ,
queryid ,
blocking_pids ,
MIN ( timepoint ) OVER (PARTITION BY pid , locktype ,mode ) as started
FROM
activity_hist.archive_locking
WHERE
timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND
pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
NOT granted AND
queryid IS NOT NULL
GROUP BY
pid ,
locktype ,
mode ,
timepoint ,
queryid ,
blocking_pids
)
SELECT
lt.pid ,
lt.locktype ,
lt.mode ,
lt.started ,
lt.queryid ,
lt.blocking_pids ,
COUNT(*) * interval '1 second' as duration
FROM lt
GROUP BY
lt.pid ,
lt.locktype ,
lt.mode ,
lt.started ,
lt.queryid ,
lt.blocking_pids
ORDER BY 4
Isibonelo:
| KULINDE IZIKHI NGEZINHLOBO ZE-QUERYID +----------+-----------+----- ---------------------------- +---------------------------+--- ----------------- -+-------------------+------------ ------------------------------------ pid| uhlobo lokukhiya| imodi| iqalile| umbuzo| blocking_pids| ubude besikhathi +----------+-------------------------------------- ---------+--------------------------------------- -----------+-------------------+------------------ --- | 11288 | transactionid| ShareLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626 | transactionid| ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626 | transactionid| ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626 | transactionid| ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626 | transactionid| ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629 | transactionid| ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629 | transactionid| ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| transactionid| ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| transactionid| ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| transactionid| ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213 | transactionid| ShareLock| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10
UKUTHATHA IZIKHIWO NGEZINHLOBO ZOKUSHIYA NGE-QUERYID
Uphenyo
WITH
lt AS
(
SELECT
pid ,
locktype ,
mode ,
timepoint ,
queryid ,
blocking_pids ,
MIN ( timepoint ) OVER (PARTITION BY pid , locktype ,mode ) as started
FROM
activity_hist.archive_locking
WHERE
timepoint between pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND
pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
granted AND
queryid IS NOT NULL
GROUP BY
pid ,
locktype ,
mode ,
timepoint ,
queryid ,
blocking_pids
)
SELECT
lt.pid ,
lt.locktype ,
lt.mode ,
lt.started ,
lt.queryid ,
lt.blocking_pids ,
COUNT(*) * interval '1 second' as duration
FROM lt
GROUP BY
lt.pid ,
lt.locktype ,
lt.mode ,
lt.started ,
lt.queryid ,
lt.blocking_pids
ORDER BY 4
Isibonelo:
| UKUTHATHA IZIKHI NGEZINHLOBO ZE-QUERYID +----------+-----------+------ --------------+ ---------------------------+---- -----------------+ --------------------+------------ -------- | pid| uhlobo lokukhiya| imodi| iqalile| umbuzo| blocking_pids| ubude besikhathi +----------+-------------------------------------- ---------+--------------------------------------- -----------+-------------------+------------------ --- | 11288 | ubudlelwano| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092 | transactionid| I-ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288 | ubudlelwano| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092 | ubudlelwano| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11092 | virtualxid| I-ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288 | virtualxid| I-ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288 | transactionid| I-ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288 | isiqephu| AccessExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34
Ukusebenzisa umlando wokukhiya ukuhlaziya izigameko zokusebenza.
- Isicelo esino-queryid=389015618226997618 enziwe inqubo ene-pid=11288 besilinde ukuvinjwa kusukela ngo-2019-09-17 10:00:00 imizuzu emi-3.
- Ilokhi ibibanjwe inqubo ene-pid=11092
- Inqubo ene-pid=11092 efaka isicelo nge-queryid=389015618226997618 eqala ngo-2019-09-17 10:00:00 ibambe ilokhi imizuzu emi-3.
Umphumela
Manje, ngithemba, ingxenye ethakazelisa kakhulu futhi ewusizo izoqala - ukuqoqa izibalo nokuhlaziya amacala emlandweni wokulinda nokuvinjelwa.
Ngokuzayo, ngifuna ukukholelwa, sizothola isethi yamanothi athile (afana ne-Oracle's metalink).
Ngokuvamile, kungenxa yalesi sizathu ukuthi indlela yokusebenza esetshenzisiwe yenziwa itholakale kuwo wonke umuntu ngokushesha okukhulu.
Ngizozama ukuthumela iphrojekthi ku-github esikhathini esizayo esiseduze.
Source: www.habr.com