Artikli jätk ««.
Artiklis käsitletakse ja näidatakse konkreetsete päringute ja näidete abil, millist kasulikku teavet on võimalik saada pg_stat_activity ajaloo kaudu.
Hoiatus.
Kuna teema on uus ja katseaeg on lõpetamata, võib artikkel sisaldada vigu. Kritika ja märkused on teretulnud ja oodatud.
Sisendandmed
pg_stat_statements vaate ajalugu
pg_stat_history
Loo TABEL pg_stat_history (
id SERIAL,
snapshot_timestamp timestamp without time zone,
database_id integer,
dbid oid,
userid oid,
queryid bigint,
query text,
calls bigint,
total_time täpsus,
min_time täpsus,
max_time täpsus,
mean_time täpsus,
stddev_time täpsus,
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 täpsus,
blk_write_time täpsus,
baseline_id integer );Tabel täidetakse iga tunni tagant, kasutades dblink-i sihttandmebaasi. Tabelis on kõige huvitavam ja kasulikum veerg, muidugi queryid.
pg_stat_activity vaate ajalugu
archive_pg_stat_activity
Loo TABEL archive_pg_stat_activity
(
timepoint timestamp without time zone,
datid oid,
datname name,
pid integer,
usesysid oid,
usename name,
application_name text,
client_addr inet,
client_hostname text,
client_port integer,
backend_start timestamp without time zone,
xact_start timestamp without time zone,
query_start timestamp without time zone,
state_change timestamp without time zone,
wait_event_type text,
wait_event text,
state text,
backend_xid xid,
backend_xmin xid,
query text,
backend_type text,
queryid bigint
);Tabel on tunni kaupa sektsioonideks jagatud tabel history_pg_stat_activity (Lisaks siia — ja siin —
Väljundandmed
KLUSTRI CPU AEG (SÜSTEEM + KLIENDID)
Päring
WITH
t AS
(
SELECT
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
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
( aa.wait_event_type IS NULL ) AND
aa.state = 'active'
)
SELECT count(*)
INTO cpu_total
FROM t ;Näide
KLUSTRI CPU AEG (SÜSTEEM + KLIENDID) : 28:37:46KLUSTRI OOTAMISE AEG
Päring
KOOS
t AS
(
VALI
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
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
( aa.wait_event_type IS NOT NULL ) AND
aa.state = 'aktiivne'
)
VALI count(*)
INTO cpu_total
FROM t ;Näide
KLOSTER OOTE AEG : 30:12:49Kokku pg_stat_statements väärtused
Päring
--KOKKU pg_stat
VALI
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
INTO
pg_total_stat_history_rec
FROM
pg_stat_history
WHERE
snapshot_timestamp BETWEEN pg_stat_history_begin AND pg_stat_history_end AND
queryid IS NULL;SQL DBTIME — koguaeg päringute täitmiseks
Päring
dbtime_total = interval '1 millisecond' * pg_total_stat_history_rec.total_time ;Näide
SQL DBTIME : 136:49:36SQL CPU AEG — CPU aeg, mis on kulunud päringute täitmiseks
Päring
KOOS
t AS
(
VALI
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
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
( aa.wait_event_type IS NULL ) AND
backend_type = 'client backend' AND
aa.state = 'aktiivne'
)
VALI count(*)
INTO cpu_total
FROM t ;Näide
SQL CPU AEG : 27:40:15SQL OOTE AEG — koguaeg, mille jooksul päringud ootasid
Päring
KOOS
t AS
(
VALI
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
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
( aa.wait_event_type IS NOT NULL ) AND
aa.state = 'aktiivne' AND
backend_type = 'client backend'
)
VALI count(*)
INTO waiting_total
FROM t ;Näide
SQL OOTE AEG : 30:04:09Jätkame kõige huvitavama osaga
Näide
| SQL IOTIME : 19:44:50
| SQL LOE AEG : 19:44:32
| SQL KIRJUTA AEG : 00:00:17
|
| SQL KÕNDE : 12188248
-------------------------------------------------------------
| SQL ÜHINE BLOKK LOED : 7997039120
| SQL ÜHINE BLOKK HIIRED : 8868286092
| SQL ÜHINE BLOKK HIIRED/LOED % : 110.89
| SQL ÜHINE BLOKK TÖÖTAMINE : 419945
| SQL ÜHINE BLOKK KIRJUTATUD : 19857
|
| SQL AJUTISED BLOKK LOED : 7836169
| SQL AJUTISED BLOKK KIRJUTATUD : 10683938
Liigume edasi kõige põnevama osa juurde
OOTE STATISTIKA
TOP 10 OOTET KOGU AJA JÄRGI KLIENTIDE PROTSESSIDELE
Päring
VALI
wait_event_type , wait_event ,
get_system_waiting_duration( wait_event_type , wait_event ,pg_stat_history_begin+(current_hour_diff * interval '1 hour') ,pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
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 backend_type != 'client backend' AND wait_event_type IS NOT NULL
GROUP BY
wait_event_type, wait_event
ORDER BY 3 DESC
LIMIT 10Näide
+------------------------------------------------------------------------------------ | TOP 10 OOTED KÜLASTAMISE TÄISAEG JÄRELE VÕETUD SÜSTEEMIPROTSESSIDEKS +-----+------------------------------+--------------------+-------------------- | #| ootetüüp| ootetüüp| kestus +-----+------------------------------+--------------------+-------------------- | 1| Aktiviteet| LogicalLauncherMain| 10:43:28 | 2| Aktiviteet| AutoVacuumMain| 10:42:49 | 3| Aktiviteet| WalWriterMain| 10:28:53 | 4| Aktiviteet| CheckpointerMain| 10:23:50 | 5| Aktiviteet| BgWriterMain| 09:11:59 | 6| Aktiviteet| BgWriterHibernate| 01:37:46 | 7| IO| BufFileWrite| 00:02:35 | 8| LWLock| buffer_mapping| 00:01:54 | 9| IO| DataFileRead| 00:01:23 | 10| IO| WALWrite| 00:00:59 +-----+------------------------------+--------------------+--------------------
TOP 10 OOTET KOGU AJA JÄRGI KLIENTIDE PROTSESSIDELE
Päring
SELECT
ootetüüp , ootetüüp ,
get_clients_waiting_duration( ootetüüp , ootetüüp , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as kestus
FROM
activity_hist.archive_pg_stat_activity aa
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 backend_type = 'client backend' AND ootetüüp IS NOT NULL
GROUP BY ootetüüp, ootetüüp
ORDER BY 3 DESC
LIMIT 10Näide
+-----+------------------------------+--------------------+--------------------+---------- | #| ootetüüp| ootetüüp| kestus| % dbtime +-----+------------------------------+--------------------+--------------------+---------- | 1| Lock| transactionid| 08:16:47| 6.05 | 2| IO| DataFileRead| 06:13:41| 4.55 | 3| Timeout| PgSleep| 02:53:21| 2.11 | 4| LWLock| buffer_mapping| 00:40:42| 0.5 | 5| LWLock| buffer_io| 00:17:17| 0.21 | 6| IO| BufFileWrite| 00:01:34| 0.02 | 7| Lock| tuple| 00:01:32| 0.02 | 8| Client| ClientRead| 00:01:19| 0.02 | 9| IO| BufFileRead| 00:00:37| 0.01 | 10| LWLock| buffer_content| 00:00:08| 0 +-----+------------------------------+--------------------+--------------------+----------
OOTAMISTE TYYBID KOKKU WAIT TIME JÄRELE, SÜSTEEMIPROTSESSIDEKS
Päring
SELECT
ootetüüp ,
get_system_waiting_type_duration( ootetüüp , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as kestus
FROM
activity_hist.archive_pg_stat_activity aa
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 backend_type != 'client backend' AND ootetüüp IS NOT NULL
GROUP BY ootetüüp
ORDER BY 2 DESCNäide
+-----+------------------------------+-------------------- | #| wait_event_type| duration +-----+------------------------------+-------------------- | 1| Activity| 53:08:45 | 2| IO| 00:06:24 | 3| LWLock| 00:03:02 +-----+------------------------------+--------------------
OOTEWAITIDE TÜÜPIDE KOHTA KLIENDIPROTSSESSIDE KESTVUS
Päring
VALI
wait_event_type ,
get_clients_waiting_type_duration( wait_event_type , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
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 backend_type = 'client backend' AND wait_event_type IS NOT NULL
GROUP BY wait_event_type
ORDER BY 2 DESCNäide
+-----+------------------------------+--------------------+-------------------- | #| wait_event_type| duration| % dbtime +-----+------------------------------+--------------------+-------------------- | 1| Lock| 08:18:19| 6.07 | 2| IO| 06:16:01| 4.58 | 3| Timeout| 02:53:21| 2.11 | 4| LWLock| 00:58:12| 0.71 | 5| Client| 00:01:19| 0.02 | 6| IPC| 00:00:04| 0 +-----+------------------------------+--------------------+--------------------
Oote kestused, süsteemsete protsesside ja üksikute päringute jaoks.
OOTE SÜSTEEMI PROTSESSIDELE
Päring
VALI
backend_type , datname , wait_event_type , wait_event , get_backend_type_waiting_duration( backend_type , wait_event_type , wait_event , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
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 backend_type != 'client backend' AND wait_event_type IS NOT NULL
GROUP BY backend_type , datname , wait_event_type , wait_event
ORDER BY 5 DESCNäide
+-----+-----------------------------+----------+--------------------+----------------------+-------------------- | #| backend_type| dbname| wait_event_type| wait_event| duration +-----+-----------------------------+----------+--------------------+----------------------+-------------------- | 1| logical replication launcher| | Activity| LogicalLauncherMain| 10:43:28 | 2| autovacuum launcher| | Activity| AutoVacuumMain| 10:42:49 | 3| walwriter| | Activity| WalWriterMain| 10:28:53 | 4| checkpointer| | Activity| CheckpointerMain| 10:23:50 | 5| background writer| | Activity| BgWriterMain| 09:11:59 | 6| background writer| | Activity| BgWriterHibernate| 01:37:46 | 7| parallel worker| tdb1| IO| BufFileWrite| 00:02:35 | 8| parallel worker| tdb1| LWLock| buffer_mapping| 00:01:41 | 9| parallel worker| tdb1| IO| DataFileRead| 00:01:22 | 10| parallel worker| tdb1| IO| BufFileRead| 00:00:59 | 11| walwriter| | IO| WALWrite| 00:00:57 | 12| parallel worker| tdb1| LWLock| buffer_io| 00:00:47 | 13| autovacuum worker| tdb1| LWLock| buffer_mapping| 00:00:13 | 14| background writer| | IO| DataFileWrite| 00:00:12 | 15| checkpointer| | IO| DataFileWrite| 00:00:11 | 16| walwriter| | LWLock| WALWriteLock| 00:00:09 | 17| checkpointer| | LWLock| WALWriteLock| 00:00:06 | 18| background writer| | LWLock| WALWriteLock| 00:00:06 | 19| walwriter| | IO| WALInitWrite| 00:00:02 | 20| autovacuum worker| tdb1| LWLock| WALWriteLock| 00:00:02 | 21| walwriter| | IO| WALInitSync| 00:00:02 | 22| autovacuum worker| tdb1| IO| DataFileRead| 00:00:01 | 23| checkpointer| | IO| ControlFileSyncUpdate| 00:00:01 | 24| background writer| | IO| WALWrite| 00:00:01 | 25| background writer| | IO| DataFileFlush| 00:00:01 | 26| checkpointer| | IO| SLRUFlushSync| 00:00:01 | 27| autovacuum worker| tdb1| IO| WALWrite| 00:00:01 | 28| checkpointer| | IO| DataFileSync| 00:00:01 +-----+-----------------------------+----------+--------------------+----------------------+--------------------
SQL OOTE — ootused üksikutele päringutele queryid järgi
Päring
VALI
queryid , datname , wait_event_type , wait_event , get_query_waiting_duration( queryid , wait_event_type , wait_event , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
KUSTE
activity_hist.archive_pg_stat_activity aa
KUSKONDA
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type = 'client backend' AND wait_event_type IS NOT NULL AND queryid IS NOT NULL
GROUP BY queryid , datname , wait_event_type , wait_event
ORDER BY 1 , 5 DESC Näide
+-----+-------------------------+----------+--------------------+--------------------+--------------------+-------------------- | #| queryid| dbname| wait_event_type| wait_event| waitings| total | | | | | | duration| duration +-----+-------------------------+----------+--------------------+--------------------+--------------------+-------------------- | 1| -8247416849404883188| tdb1| Client| ClientRead| 00:00:02| | 2| -6572922443698419129| tdb1| Client| ClientRead| 00:00:05| | 3| -6572922443698419129| tdb1| IO| DataFileRead| 00:00:01| | 4| -5917408132400665328| tdb1| Client| ClientRead| 00:00:04| | 5| -4091009262735781873| tdb1| Client| ClientRead| 00:00:03| | 6| -1473395109729441239| tdb1| Client| ClientRead| 00:00:01| | 7| 28942442626229688| tdb1| IO| BufFileWrite| 00:01:34| 00:46:06 | 8| 28942442626229688| tdb1| LWLock| buffer_mapping| 00:01:05| 00:46:06 | 9| 28942442626229688| tdb1| IO| DataFileRead| 00:00:44| 00:46:06 | 10| 28942442626229688| tdb1| IO| BufFileRead| 00:00:37| 00:46:06 | 11| 28942442626229688| tdb1| LWLock| buffer_io| 00:00:35| 00:46:06 | 12| 28942442626229688| tdb1| Client| ClientRead| 00:00:05| 00:46:06 | 13| 28942442626229688| tdb1| IPC| MessageQueueReceive| 00:00:03| 00:46:06 | 14| 28942442626229688| tdb1| IPC| BgWorkerShutdown| 00:00:01| 00:46:06 | 15| 389015618226997618| tdb1| Lock| transactionid| 03:55:09| 04:14:15 | 16| 389015618226997618| tdb1| IO| DataFileRead| 03:23:09| 04:14:15 | 17| 389015618226997618| tdb1| LWLock| buffer_mapping| 00:12:09| 04:14:15 | 18| 389015618226997618| tdb1| LWLock| buffer_io| 00:10:18| 04:14:15 | 19| 389015618226997618| tdb1| Lock| tuple| 00:00:35| 04:14:15 | 20| 389015618226997618| tdb1| LWLock| WALWriteLock| 00:00:02| 04:14:15 | 21| 389015618226997618| tdb1| IO| DataFileWrite| 00:00:01| 04:14:15 | 22| 389015618226997618| tdb1| LWLock| SyncScanLock| 00:00:01| 04:14:15 | 23| 389015618226997618| tdb1| Client| ClientRead| 00:00:01| 04:14:15 | 24| 734234407411547467| tdb1| Client| ClientRead| 00:00:11| | 25| 734234407411547467| tdb1| LWLock| buffer_mapping| 00:00:05| | 26| 734234407411547467| tdb1| IO| DataFileRead| 00:00:02| | 27| 1237430309438971376| tdb1| LWLock| buffer_mapping| 00:02:18| 02:45:40 | 28| 1237430309438971376| tdb1| IO| DataFileRead| 00:00:27| 02:45:40 | 29| 1237430309438971376| tdb1| Client| ClientRead| 00:00:02| 02:45:40 | 30| 2404820632950544954| tdb1| Client| ClientRead| 00:00:01| | 31| 2515308626622579467| tdb1| Client| ClientRead| 00:00:02| | 32| 4710212362688288619| tdb1| LWLock| buffer_mapping| 00:03:08| 02:18:21 | 33| 4710212362688288619| tdb1| IO| DataFileRead| 00:00:22| 02:18:21 | 34| 4710212362688288619| tdb1| Client| ClientRead| 00:00:06| 02:18:21 | 35| 4710212362688288619| tdb1| LWLock| buffer_io| 00:00:02| 02:18:21 | 36| 9150846928388977274| tdb1| IO| DataFileRead| 00:01:19| | 37| 9150846928388977274| tdb1| LWLock| buffer_mapping| 00:00:34| | 38| 9150846928388977274| tdb1| Client| ClientRead| 00:00:10| | 39| 9150846928388977274| tdb1| LWLock| buffer_io| 00:00:01| +-----+-------------------------+----------+--------------------+--------------------+--------------------+--------------------
KLIENDI SQL STATISTIKA — POPULAARSEIMAD PÄRIMISED
Pärimised, mille saamine on taas tõeliselt lihtne ja ruumi kokkuhoiu huvides, ei ole välja toodud.
Näited
+------------------------------------------------------------------------------------ | KLIENDI SQL järjestatud möödunud aja järgi +--------------------+----------+----------+----------+----------+----------+-------------------- | möödunud aeg| kõned| % andmeaja| % CPU| % IO| andmebaas| päringu ID +--------------------+----------+----------+----------+----------+----------+-------------------- | 04:14:15| 19| 3.1| 10.83| 11.52| tdb1| 389015618226997618 | 02:45:40| 746| 2.02| 4.23| 0.08| tdb1| 1237430309438971376 | 02:18:21| 749| 1.69| 3.39| 0.1| tdb1| 4710212362688288619 | 00:46:06| 375| 0.56| 0.94| 0.41| tdb1| 28942442626229688 +--------------------+----------+----------+----------+----------+----------+-------------------- | KLIENDI SQL järjestatud CPU aja järgi +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | CPU aeg| kõned| % andmeaja|kogu_aeg| % CPU| % IO| andmebaas| päringu ID +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 02:59:49| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 01:10:12| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 00:56:15| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 | 00:15:35| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | KLIENDI SQL järjestatud Kasutaja I/O Ooteaja järgi +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | I/O oote aeg| kõned| % andmeaja|kogu_aeg| % CPU| % IO| andmebaas| päringu ID +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 03:23:10| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 00:02:54| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 00:00:27| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 00:00:22| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | KLIENDI SQL järjestatud Jagatud Pufferite Lugemise järgi +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | puhver lugemised| kõned| % andmeaja|kogu_aeg| % CPU| % IO| andmebaas| päringu ID +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 1056388566| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 11709251| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 3439004| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 3373330| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | KLIENDI SQL järjestatud Diski Lugemise Aja järgi +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | lugemise aeg| kõned| % andmeaja|kogu_aeg| % CPU| % IO| andmebaas| päringu ID +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 02:16:30| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 00:04:50| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 00:01:10| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 | 00:00:57| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | KLIENDI SQL järjestatud Täitmiste järgi +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | kõned| read| % andmeaja|kogu_aeg| % CPU| % IO| andmebaas| päringu ID +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 749| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 | 746| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 375| 0| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 19| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 +--------------------+----------+----------+----------+----------+----------+----------+--------------------
Kokkuvõte
Kasutades esitatud päringute ja saadud aruannete, on võimalik saada põhjalikumat ülevaadet analüüsi ja jõudlusega seotud probleemide lahendamise kohta nii üksikute päringute kui ka kogu kihi tasandil.
Areng
Praegused arenguplaanid on järgmised:
- Täiendage aruandlust lukustuste ajaloo andmetega. Päringud on testimisel ja esitatakse varsti.
- Kasutage laiendust TimescaleDB pg_stat_activity ja pg_locks ajaloo salvestamiseks.
- Valmistage ette paketilahendus githubis masstoimingute jaoks tootmisandmebaasides.
Jätkub…
Allikas: habr.com
