Sii wadida maqaalka"Β«.
Maqaalku wuxuu tixgelin doonaa oo muujin doonaa weydiimo gaar ah iyo tusaaleyaal macluumaadka waxtarka leh ee la heli karo iyadoo la adeegsanayo taariikhda aragtida pg_locks.
Digniin
Mawduuca ku cusub iyo dhamaystir la'aanta muddada imtixaanku awgeed, maqaalku waxa uu ku jiri karaa khaladaad. Dhaliilaha iyo faallooyinka waa la soo dhawaynayaa waana la filayaa.
Xog galinta
pg_locks taariikhda matalaadda
kayd_xidhid
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
);Asal ahaan, miisku wuxuu la mid yahay miiska archive_pg_stat_activitysi faahfaahsan halkan loogu sharaxay - iyo halkan -
Si aad u buuxiso tiir waydiiyey function loo isticmaalo
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;Sharaxaad: Qiimaha tiirka queryid waxa lagu cusboonaysiiyaa shaxda taariikhda_qufulka, ka dibna marka qayb cusub loo sameeyo miiska_qufulka, qiimihii waxa lagu kaydin doonaa qiyamka taariikhiga ah.
Natiijada
Macluumaadka guud ee hababka guud ahaan.
SUGGA QOFKA QOFKA LOCK
Codso
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 Tusaale:
| SUGGA QOFKA QOFKA LOCK ----+------ | nooca quful| qaabka| muddada +----------- ----------------- | macaamil ganacsi| sharelock| 19:39:26 | tuple| AccessExclusiveLock| 00:03:35 +------------- ---------
QABSASHADA QOFKA QURUXDA
Codso
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 Tusaale:
| QABSASHADA QURUXDA QOFKA QOFKA + ---- ----+------ | nooca quful| qaabka| muddada +----------- ----------------- | xiriirka| RowExclusiveLock| 51:11:10 | virtualxid| ExclusiveLock| 48:10:43 | macaamil ganacsi| ExclusiveLock| 44:24:53 | xiriirka| AccessShareLock| 20:06:13 | tuple| AccessExclusiveLock| 17:58:47 | tuple| ExclusiveLock| 01:40:41 | xiriirka| ShareUpdateExclusiveLock| 00:26:41 | walax| RowExclusiveLock| 00:00:01 | macaamil ganacsi| sharelock| 00:00:01 | kordhin| ExclusiveLock| 00:00:01 +------------- ---------
Macluumaad faahfaahsan oo ku saabsan weydiimaha gaarka ah
SUGGA QOFKA QURUXDA QUERYID
Codso
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 4Tusaale:
| SUGGA QOFKA QURUXDA QUERYID +---------------- ------------------ ---------- --------- | pid| nooca quful| qaabka| bilaabay| queryid| xannibidda_pids| muddada +---------- --------------------- ---+-------- --- | 11288| macaamil ganacsi| sharelock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626| macaamil ganacsi| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626| macaamil ganacsi| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626| macaamil ganacsi| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626| macaamil ganacsi| sharelock| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629| macaamil ganacsi| sharelock| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629| macaamil ganacsi| sharelock| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| macaamil ganacsi| sharelock| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| macaamil ganacsi| sharelock| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| macaamil ganacsi| sharelock| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213| macaamil ganacsi| sharelock| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10
QABSASHADA QOFKA QURUXDA QUERYID
Codso
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 4Tusaale:
| QOFKA QOFKA QURUXDA QUERYID +------------------ ---------------------- -------------------------- | pid| nooca quful| qaabka| bilaabay| queryid| xannibidda_pids| muddada +---------- --------------------- ---+-------- --- | 11288| xiriirka| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092| macaamil ganacsi| ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| xiriirka| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092| xiriirka| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11092| virtualxid| ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| virtualxid| ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| macaamil ganacsi| ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| tuple| AccessExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34
Isticmaalka taariikhda xannibista marka la falanqeynayo dhacdooyinka waxqabadka.
- Weydiinta queryid=389015618226997618 oo lagu fuliyay habraac leh pid=11288 waxa ay sugaysay quful ilaa 2019-09-17 10:00:00 3 daqiiqo.
- Qufulka waxa lagu qabtay hab leh pid=11092
- Nidaam leh pid=11092 fulinta weydiinta queryid=389015618226997618 ilaa 2019-09-17 10:00:00 waxay haysay qufulka 3 daqiiqo.
Natiijada
Hadda, waxaan rajeynayaa, waxa ugu xiisaha iyo waxtarka leh ayaa bilaabi doona - ururinta tirakoobyada iyo falanqaynta kiisaska taariikhda la filayo iyo xannibaadda.
Mustaqbalka, waxaan jeclaan lahaa inaan rumaysto, waxaad heli doontaa nooc qoraal ah (oo la mid ah Oracle's metalink).
Guud ahaan, waa sababtaas sababta habka loo isticmaalo loo soo bandhigo sida ugu dhakhsaha badan ee suurtogalka ah ee aqoonta dadweynaha.
Mustaqbalka dhow waxaan isku dayi doonaa inaan mashruuca dul dhigo github.
Source: www.habr.com