د مقالې دوام "
مقاله به معاینه کړي او وښیې ، د ځانګړو پوښتنو او مثالونو په کارولو سره ، کوم ګټور معلومات د pg_locks لید تاریخ په کارولو سره ترلاسه کیدی شي.
خبرداری
د موضوع د نوښت او د ازموینې نیمګړې دورې له امله، مقاله ممکن غلطۍ ولري. انتقاد او تبصرې په کلکه هرکلی او تمه کیږي.
د معلوماتو داخلول
د pg_locks نمایش تاریخ
archive_locking
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
);
په اصل کې، میز د میز سره ورته دی آرشیف_pg_stat_activityپه تفصیل سره دلته تشریح شوي -
د کالم ډکولو لپاره پوښتنه فعالیت کارول کیږي
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;
توضيح: د queryid کالم ارزښت په history_locking table کې تازه کیږي، او بیا کله چې د آرشیف_لاک کولو میز لپاره نوې برخه جوړه شي، ارزښت به په تاریخي ارزښتونو کې زیرمه شي.
محصول
په عمومي توګه د پروسو په اړه عمومي معلومات.
د لاک ټایپونو لخوا د لاکونو لپاره انتظار کول
غوښتنه
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
بېلګه:
| د لاک ټایپونو لخوا د لاکونو لپاره انتظار کول +------------------------------------------------------------------ ------------------- | locktype| حالت| موده +--------------------------------------------------------- --+---------| transactionid| شریکول| 19:39:26 | ټپل| Access ExclusiveLock| 00:03:35 +---------------------------------------------------------------- --------+------------
د لاک ټایپونو په واسطه د بندونو اخیستل
غوښتنه
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
بېلګه:
| د لاک ټایپونو په واسطه د تالاشۍ اخیستل +--------------------------------------------------------- --------+-------------------------------- | locktype| حالت| موده +--------------------------------------------------------- --+---------| اړیکه | RowExclusiveLock| 51:11:10 | virtualxid| ځانګړې لاک| 48:10:43 | transactionid| ځانګړې لاک| 44:24:53 | اړیکه | AccessShareLock| 20:06:13 | ټپل| Access ExclusiveLock| 17:58:47 | ټپل| ځانګړې لاک| 01:40:41 | اړیکه | ShareUpdateExclusiveLock| 00:26:41 | څيز| RowExclusiveLock| 00:00:01 | transactionid| شریکول| 00:00:01 | پراخول| ځانګړې لاک| 00:00:01 +-------------------------------------------------------------------------------- --------+------------
د ځانګړو پوښتنو غوښتنلیکونو په اړه تفصيلي معلومات
د QUERYID لخوا د لاک ټایپونو لخوا د لاکونو لپاره انتظار کول
غوښتنه
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
بېلګه:
| د کوریډ لخوا د لاک ټایپونو لخوا د لاکونو لپاره انتظار کول +---------+---------------------------------- +-------------------------------------------------------------------------------- ---------------------------------- --------- | pid| locktype| حالت| پیل شو | queryid| blocking_pids| موده +--------------------------------------------------------------- -------------------------------------------------------------- -------------------------------------------------------------- --- | 11288| transactionid| شریکول| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626| transactionid| شریکول| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626| transactionid| شریکول| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626| transactionid| شریکول| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626| transactionid| شریکول| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629| transactionid| شریکول| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629| transactionid| شریکول| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| transactionid| شریکول| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| transactionid| شریکول| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| transactionid| شریکول| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213| transactionid| شریکول| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10
د QUERYID لخوا د لاک ټایپونو لخوا د لاکونو اخیستل
غوښتنه
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
بېلګه:
| د کوریډ لخوا د لاک ټایپس لخوا د لاکونو اخیستل +------------+---------------------------------------- ---------------------------------------------------------------------------- --------+------------------------- -------- | pid| locktype| حالت| پیل شو | queryid| blocking_pids| موده +----------------------------------------------- --------------------------------------------------------------- -------------------------------------------------------------- --- | 11288| اړیکه | RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092| transactionid| ځانګړی لاک| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| اړیکه | RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092| اړیکه | RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11092| virtualxid| ځانګړی لاک| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| virtualxid| ځانګړی لاک| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| transactionid| ځانګړی لاک| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11288| ټپل| Access ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34
د فعالیت پیښو تحلیل کولو لپاره د لاک تاریخ کارول.
- د queryid=389015618226997618 سره یوه غوښتنه د pid=11288 سره د پروسې لخوا اجرا شوې د 2019 دقیقو لپاره د 09-17-10 00:00:3 څخه د بلاک کولو په تمه وه.
- قلف د pid = 11092 سره د پروسې لخوا نیول شوی و
- د pid=11092 سره یوه پروسه چې د queryid=389015618226997618 سره د غوښتنې اجرا کول د 2019-09-17 10:00:00 څخه پیل کیږي د 3 دقیقو لپاره تالا ساتل کیږي.
نتیجه
اوس، زه امید لرم، ترټولو په زړه پورې او ګټوره برخه به پیل شي - د احصایو راټولول او د انتظار او بلاک کولو تاریخ کې قضیې تحلیل کول.
په راتلونکي کې ، زه غواړم باور وکړم ، موږ به د ځینې نوټونو سیټ ترلاسه کړو (د اوریکل میټلینک ته ورته).
په عموم کې، دا د دې دلیل لپاره دی چې کارول شوي میتودولوژي هرڅومره ژر چې امکان ولري چمتو کیږي.
زه به هڅه وکړم په نږدې راتلونکي کې پروژه په ګیتوب کې پوسټ کړم.
سرچینه: www.habr.com