Nga n'ihu nke edemede "
Edemede a ga-enyocha ma gosi, na-eji ajụjụ na ihe atụ akọwapụtara, enwere ike nweta ozi bara uru site na iji akụkọ ihe mere eme nke nlele pg_locks.
Dọ aka na ntị.
N'ihi ihe ọhụrụ nke isiokwu a na oge ule emechabeghị, akụkọ ahụ nwere ike ịnwe mperi. A na-anabata nkatọ na nkọwa ma na-atụ anya ya.
Ntinye data
Akụkọ ihe nnọchianya pg_locks
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
);
N'ezie, okpokoro ahụ yiri tebụl Archive_pg_stat_activity, kọwara n'ụzọ zuru ezu ebe a -
Iji mejupụta kọlụm ajụjụ a na-eji ọrụ eme ihe
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;
Nkọwa: A na-emelite uru nke kọlụm queryid na tebụl History_locking, ma mgbe emepụtara nkebi ọhụrụ maka tebụl Archive_locking, a ga-echekwa uru ahụ na ụkpụrụ akụkọ ihe mere eme.
Mmepụta
Ozi izugbe na usoro n'ozuzu.
NA-eche Mkpọchi site n'ụdị mkpọchi
Arịrịọ
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
Ihe nlele:
| NA-eche Mkpọchi site n'ụdị Mkpọchi +---------------------+ ------------------ | ụdị mkpọchi| ọnọdụ| ogologo oge +-------------------------------------------------- --+---------------------- | azụmahịa | ShareLock| 19:39:26 | tuple| AccessExclusiveLock| 00:03:35 +--------------------------------------------------- -----------------
IHE Mkpọchi site n'ụdị mkpọchi
Arịrịọ
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
Ihe nlele:
| IHE Mkpọchi site n'Ụdị Mkpọchi + -----+------------------------ ----------------- | ụdị mkpọchi| ọnọdụ| ogologo oge +-------------------------------------------------- --+---------------------- | njikọ| RowExclusiveLock| 51:11:10 | virtualxid| ExclusiveLock| 48:10:43 | azụmahịa | ExclusiveLock| 44:24:53 | njikọ| AccessShareLock| 20:06:13 | tuple| AccessExclusiveLock| 17:58:47 | tuple| ExclusiveLock| 01:40:41 | njikọ| ShareUpdateExclusiveLock| 00:26:41 | ihe| RowExclusiveLock| 00:00:01 | azụmahịa | ShareLock| 00:00:01 | gbatịa| ExclusiveLock| 00:00:01 +--------------------------------------------------- -----------------
Ozi zuru ezu na arịrịọ ajụjụ akọwapụtara
NA-eche Mkpọchi sitere n'ụdị mkpọchi nke QUERYID
Arịrịọ
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
Ihe nlele:
| Ichere Mkpọchi sitere n'ụdị mkpọchi si n'aka QUERYID +-------------------------------- -------------------------------------------------- ------------------------------ | pid | ụdị mkpọchi| ọnọdụ| malitere| ajụjụ| igbochi_pids| ogologo oge --------------------------------- -------------------------- ----------------------------- --- | 11288| azụmahịa | ShareLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11626| azụmahịa | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12380}| 00:00:29 | 11626| azụmahịa | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {11092}| 00:03:25 | 11626| azụmahịa | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12213}| 00:01:55 | 11626| azụmahịa | ShareLock| 2019-09-17 10:00:21.380921| 389015618226997618| {12751}| 00:00:01 | 11629| azụmahịa | ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {11092}| 00:03:22 | 11629| azụmahịa | ShareLock| 2019-09-17 10:00:24.331935| 389015618226997618| {12007}| 00:00:01 | 12007| azụmahịa | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11629}| 00:00:13 | 12007| azụmahịa | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11092}| 00:01:10 | 12007| azụmahịa | ShareLock| 2019-09-17 10:05:03.327933| 389015618226997618| {11288}| 00:00:05 | 12213| azụmahịa | ShareLock| 2019-09-17 10:06:07.328019| 389015618226997618| {12007}| 00:00:10
NA-ewere Mkpọchi site n'ụdị mkpọchi nke QUERYID
Arịrịọ
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
Ihe nlele:
| Iwere Mkpọchi site n'ụdị mkpọchi si n'aka QUERYID +----------------------------- -----------------------------------+---------------------+ -------------------+----------------- | pid | ụdị mkpọchi| ọnọdụ| malitere| ajụjụ| igbochi_pids| ogologo oge --------------------------------- -------------------------- ----------------------------- --- | 11288| njikọ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {11092}| 00:03:34 | 11092| azụmahịa | ExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:03:34 | 11288| njikọ| RowExclusiveLock| 2019-09-17 10:00:00.302936| 389015618226997618| {}| 00:00:10 | 11092| njikọ| 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| azụmahịa | 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
Iji akụkọ mkpọchi iji nyochaa mmemme arụmọrụ.
- Arịrịọ nwere queryid=389015618226997618 nke ejiri usoro pid=11288 mee ya nọ na-echere igbochi malite na 2019-09-17 10:00:00 maka nkeji 3.
- Ejiri usoro nwere pid=11092 jide mkpọchi ahụ
- Usoro nwere pid=11092 na-eme arịrịọ na queryid=389015618226997618 malite na 2019-09-17 10:00:00 jidere mkpọchi maka nkeji atọ.
Nsonaazụ
Ugbu a, enwere m olileanya, akụkụ kachasị mmasị na nke bara uru ga-amalite - ịnakọta ọnụ ọgụgụ na nyochaa ikpe na akụkọ ihe mere eme nke nchere na mgbochi.
N'ọdịnihu, achọrọ m ikwere, anyị ga-enweta otu ndetu ụfọdụ (dị ka Oracle's metalink).
N'ozuzu, ọ bụ ya mere usoro eji eme ihe na-eme ka onye ọ bụla nweta ngwa ngwa o kwere mee.
M ga-agbalị biputere oru ngo na github n'ọdịnihu dị nso.
isi: www.habr.com