PostgreSQL ਵਿੱਚ ਵਰਕਲੋਡ ਪ੍ਰੋਫਾਈਲ ਅਤੇ ਉਡੀਕ ਇਤਿਹਾਸ ਪ੍ਰਾਪਤ ਕਰਨ ਦਾ ਇੱਕ ਤਰੀਕਾ

ਲੇਖ ਦੀ ਨਿਰੰਤਰਤਾ "PostgreSQL ਲਈ ASH ਐਨਾਲਾਗ ਬਣਾਉਣ ਦੀ ਕੋਸ਼ਿਸ਼ ".

ਲੇਖ ਖਾਸ ਸਵਾਲਾਂ ਅਤੇ ਉਦਾਹਰਨਾਂ ਦੀ ਵਰਤੋਂ ਕਰਕੇ ਜਾਂਚ ਕਰੇਗਾ ਅਤੇ ਦਿਖਾਏਗਾ ਕਿ pg_stat_activity ਦ੍ਰਿਸ਼ ਦੇ ਇਤਿਹਾਸ ਦੀ ਵਰਤੋਂ ਕਰਕੇ ਕਿਹੜੀ ਉਪਯੋਗੀ ਜਾਣਕਾਰੀ ਪ੍ਰਾਪਤ ਕੀਤੀ ਜਾ ਸਕਦੀ ਹੈ।

ਚੇਤਾਵਨੀ
ਵਿਸ਼ੇ ਦੀ ਨਵੀਨਤਾ ਅਤੇ ਅਧੂਰੀ ਟੈਸਟਿੰਗ ਮਿਆਦ ਦੇ ਕਾਰਨ, ਲੇਖ ਵਿੱਚ ਗਲਤੀਆਂ ਹੋ ਸਕਦੀਆਂ ਹਨ। ਆਲੋਚਨਾ ਅਤੇ ਟਿੱਪਣੀਆਂ ਦਾ ਜ਼ੋਰਦਾਰ ਸਵਾਗਤ ਅਤੇ ਉਮੀਦ ਕੀਤੀ ਜਾਂਦੀ ਹੈ।

ਇਨਪੁਟ ਡਾਟਾ

pg_stat_statements ਸਪੁਰਦਗੀ ਇਤਿਹਾਸ

pg_stat_history

CREATE TABLE 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 double precision, 
min_time double precision, 
max_time double precision, 
mean_time double precision,
stddev_time double precision,
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 double precision, 
blk_write_time double precision, 
baseline_id integer );

ਟਾਰਗਿਟ ਡੇਟਾਬੇਸ ਲਈ dblink ਦੀ ਵਰਤੋਂ ਕਰਕੇ ਸਾਰਣੀ ਹਰ ਘੰਟੇ ਭਰੀ ਜਾਂਦੀ ਹੈ। ਸਾਰਣੀ ਵਿੱਚ ਸਭ ਤੋਂ ਦਿਲਚਸਪ ਅਤੇ ਉਪਯੋਗੀ ਕਾਲਮ, ਬੇਸ਼ਕ queryid.

pg_stat_activity ਦੇਖਣ ਦਾ ਇਤਿਹਾਸ

archive_pg_stat_activity

CREATE TABLE 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
);

ਸਾਰਣੀ ਇੱਕ ਇਤਿਹਾਸ_ਪੀਜੀ_ਸਟੈਟ_ਐਕਟੀਵਿਟੀ ਟੇਬਲ ਹੈ ਜੋ ਘੰਟੇ ਦੁਆਰਾ ਵੰਡਿਆ ਗਿਆ ਹੈ (ਹੋਰ ਵੇਰਵੇ ਇੱਥੇ - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? ਅਤੇ ਇੱਥੇ - PostgreSQL ਲਈ ASH ਦਾ ਐਨਾਲਾਗ ਬਣਾਉਣ ਦੀ ਕੋਸ਼ਿਸ਼।)

ਆਉਟਪੁੱਟ

ਕਲੱਸਟਰ CPU ਸਮਾਂ (ਸਿਸਟਮ + ਕਲਾਇੰਟਸ)

ਬੇਨਤੀ

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 ;

ਉਦਾਹਰਨ:

CLUSTER CPU TIME (SYSTEM + CLIENTS ) : 28:37:46

ਕਲੱਸਟਰ ਉਡੀਕ ਦਾ ਸਮਾਂ

ਬੇਨਤੀ

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 NOT NULL  ) AND
			aa.state = 'active'
 )
 SELECT count(*) 
 INTO cpu_total
 FROM t ;

ਉਦਾਹਰਨ:

CLUSTER WAITINGS TIME : 30:12:49

ਕੁੱਲ pg_stat_statements ਮੁੱਲ

ਬੇਨਤੀ

 --TOTAL pg_stat
  SELECT 
    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 - ਕੁੱਲ ਪੁੱਛਗਿੱਛ ਐਗਜ਼ੀਕਿਊਸ਼ਨ ਸਮਾਂ

ਬੇਨਤੀ

dbtime_total = interval '1 millisecond' * pg_total_stat_history_rec.total_time ;

ਉਦਾਹਰਨ:

SQL DBTIME : 136:49:36

SQL CPU TIME - ਸਵਾਲਾਂ ਨੂੰ ਲਾਗੂ ਕਰਨ ਵਿੱਚ ਖਰਚਿਆ CPU ਸਮਾਂ

ਬੇਨਤੀ

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
			backend_type = 'client backend' AND 
			aa.state = 'active'
 )
 SELECT count(*) 
 INTO cpu_total
 FROM t ;

ਉਦਾਹਰਨ:

SQL CPU TIME : 27:40:15

SQL ਉਡੀਕ ਸਮਾਂ - ਸਵਾਲਾਂ ਲਈ ਕੁੱਲ ਉਡੀਕ ਸਮਾਂ

ਬੇਨਤੀ

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 NOT NULL  ) AND
			aa.state = 'active' AND 
		backend_type = 'client backend'
 )
 SELECT count(*) 
 INTO waiting_total
 FROM t ;

ਉਦਾਹਰਨ:

SQL WAITINGS TIME : 30:04:09

ਹੇਠਾਂ ਦਿੱਤੇ ਸਵਾਲ ਮਾਮੂਲੀ ਹਨ ਅਤੇ ਸਪੇਸ ਬਚਾਉਣ ਲਈ ਲਾਗੂ ਕਰਨ ਦੇ ਵੇਰਵਿਆਂ ਨੂੰ ਛੱਡ ਦਿੱਤਾ ਗਿਆ ਹੈ:

ਉਦਾਹਰਨ:

| SQL IOTIME : 19:44:50
| SQL READ TIME : 19:44:32
| SQL WRITE TIME : 00:00:17
|
| SQL CALLS : 12188248
-------------------------------------------------------------
| SQL SHARED BLOCKS READS : 7997039120
| SQL SHARED BLOCKS HITS : 8868286092
| SQL SHARED BLOCKS HITS/READS % : 110.89
| SQL SHARED BLOCKS DIRTED : 419945
| SQL SHARED BLOCKS WRITTEN : 19857
|
| SQL TEMPORARY BLOCKS READS : 7836169
| SQL TEMPORARY BLOCKS WRITTEN : 10683938

ਆਉ ਸਭ ਤੋਂ ਦਿਲਚਸਪ ਭਾਗ ਵੱਲ ਵਧੀਏ

ਉਡੀਕ ਸਥਿਰ

ਗ੍ਰਾਹਕ ਪ੍ਰਕਿਰਿਆਵਾਂ ਲਈ ਕੁੱਲ ਉਡੀਕ ਸਮੇਂ ਦੁਆਰਾ ਚੋਟੀ ਦੀਆਂ 10 ਉਡੀਕਾਂ

ਬੇਨਤੀ

SELECT 
  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 10

ਉਦਾਹਰਨ:

+------------------------------------------------ ----------------------------------- | ਸਿਸਟਮ ਪ੍ਰਕਿਰਿਆਵਾਂ ਲਈ ਕੁੱਲ ਉਡੀਕ ਸਮੇਂ ਦੁਆਰਾ ਚੋਟੀ ਦੀਆਂ 10 ਉਡੀਕਾਂ +------+------------------------------- ------------------------------------------- | #| ਉਡੀਕ_ਘਟਨਾ_ਕਿਸਮ| ਉਡੀਕ_ਘਟਨਾ| ਮਿਆਦ +------+----------------------------+------------ -------+------------ | 1| ਗਤੀਵਿਧੀ| ਲਾਜ਼ੀਕਲ ਲਾਂਚਰਮੇਨ| 10:43:28 | 2| ਗਤੀਵਿਧੀ| ਆਟੋਵੈਕਿਊਮਮੇਨ| 10:42:49 | 3| ਗਤੀਵਿਧੀ| WalWriterMain| 10:28:53 | 4| ਗਤੀਵਿਧੀ| ਚੈੱਕਪੁਆਇੰਟਰ ਮੇਨ| 10:23:50 | 5| ਗਤੀਵਿਧੀ| BgWriterMain| 09:11:59 | 6| ਗਤੀਵਿਧੀ| BgWriterHibernate| 01:37:46 | 7| IO| ਬਫਫਾਇਲਰਾਈਟ| 00:02:35 | 8| LWLock | ਬਫਰ_ਮੈਪਿੰਗ| 00:01:54 | 9| IO| DataFileRead| 00:01:23 | 10| IO| WALWrite| 00:00:59 +----------------------------------------------- --------------+------------

ਗ੍ਰਾਹਕ ਪ੍ਰਕਿਰਿਆਵਾਂ ਲਈ ਕੁੱਲ ਉਡੀਕ ਸਮੇਂ ਦੁਆਰਾ ਚੋਟੀ ਦੀਆਂ 10 ਉਡੀਕਾਂ

ਬੇਨਤੀ

SELECT 
  wait_event_type , wait_event ,
  get_clients_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 10

ਉਦਾਹਰਨ:

+-------------------------------------------------- ------------+------------+------------ | #| ਉਡੀਕ_ਘਟਨਾ_ਕਿਸਮ| ਉਡੀਕ_ਘਟਨਾ| ਮਿਆਦ | % dbtime +------+--------------------------------------------+--------- ----------+------------+--------- | 1| ਲਾਕ | transactionid| 08:16:47 | 6.05 | 2| IO| DataFileRead| 06:13:41 | 4.55 | 3| ਸਮਾਂ ਸਮਾਪਤ | PgSleep| 02:53:21 | 2.11 | 4| LWLock | ਬਫਰ_ਮੈਪਿੰਗ| 00:40:42| 0.5 | 5| LWLock | ਬਫਰ_io| 00:17:17 | 0.21 | 6| IO| ਬਫਫਾਇਲਰਾਈਟ| 00:01:34| 0.02 | 7| ਲਾਕ | tuple | 00:01:32| 0.02 | 8| ਕਲਾਇੰਟ | ਕਲਾਇੰਟ ਰੀਡ | 00:01:19 | 0.02 | 9| IO| ਬਫਫਾਇਲਰੀਡ| 00:00:37| 0.01 | 10| LWLock | buffer_content| 00:00:08| 0+------+-----------------------------------------+------------ -------+------------+---------

ਸਿਸਟਮ ਪ੍ਰਕਿਰਿਆਵਾਂ ਲਈ, ਕੁੱਲ ਉਡੀਕ ਸਮੇਂ ਦੁਆਰਾ ਉਡੀਕ ਦੀਆਂ ਕਿਸਮਾਂ

ਬੇਨਤੀ

SELECT 
  wait_event_type ,
  get_system_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 DESC

ਉਦਾਹਰਨ:

+-------------------------------------------------- ------------ | #| ਉਡੀਕ_ਘਟਨਾ_ਕਿਸਮ| ਮਿਆਦ +------+----------------------------+------------ ------- | 1| ਗਤੀਵਿਧੀ| 53:08:45 | 2| IO| 00:06:24 | 3| LWLock | 00:03:02 +----------------------------------------------- -------------

ਗਾਹਕਾਂ ਦੀਆਂ ਪ੍ਰਕਿਰਿਆਵਾਂ ਲਈ, ਕੁੱਲ ਉਡੀਕ ਸਮੇਂ ਦੁਆਰਾ ਉਡੀਕ ਦੀਆਂ ਕਿਸਮਾਂ

ਬੇਨਤੀ

SELECT 
  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 DESC

ਉਦਾਹਰਨ:

+-------------------------------------------------- ------------+------------ | #| ਉਡੀਕ_ਘਟਨਾ_ਕਿਸਮ| ਮਿਆਦ | % dbtime +------+--------------------------------------------+--------- ----------+---------------------- | 1| ਲਾਕ | 08:18:19 | 6.07 | 2| IO| 06:16:01 | 4.58 | 3| ਸਮਾਂ ਸਮਾਪਤ | 02:53:21 | 2.11 | 4| LWLock | 00:58:12| 0.71 | 5| ਕਲਾਇੰਟ | 00:01:19 | 0.02 | 6| IPC| 00:00:04| 0+------+-----------------------------------------+------------ ------------------------------

ਸਿਸਟਮ ਪ੍ਰਕਿਰਿਆਵਾਂ ਅਤੇ ਵਿਅਕਤੀਗਤ ਬੇਨਤੀਆਂ ਲਈ ਅਵਧੀ ਦੀ ਉਡੀਕ ਕਰੋ।

ਸਿਸਟਮ ਪ੍ਰਕਿਰਿਆਵਾਂ ਲਈ ਉਡੀਕ

ਬੇਨਤੀ

SELECT 
  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 DESC

ਉਦਾਹਰਨ:

+-----+-----------------------------+----------+--------------------+----------------------+--------------------
|    #|                 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 ਲਈ ਉਡੀਕ - queryid ਦੁਆਰਾ ਵਿਅਕਤੀਗਤ ਸਵਾਲਾਂ ਦੀ ਉਡੀਕ ਕਰਦਾ ਹੈ

ਬੇਨਤੀ

SELECT 
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 
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 AND queryid IS NOT NULL 
GROUP BY queryid , datname , wait_event_type , wait_event
ORDER BY 1 , 5 DESC 

ਉਦਾਹਰਨ:

+-----+-------------------------+----------+--------------------+--------------------+--------------------+--------------------
|    #|                  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|
+-----+-------------------------+----------+--------------------+--------------------+--------------------+--------------------

ਕਲਾਇੰਟ SQL ਸਟੈਟਿਕਸ - ਚੋਟੀ ਦੇ ਸਵਾਲ

ਪ੍ਰਾਪਤ ਕਰਨ ਲਈ ਬੇਨਤੀਆਂ ਫਿਰ ਮਾਮੂਲੀ ਹਨ ਅਤੇ ਸਪੇਸ ਬਚਾਉਣ ਲਈ ਨਹੀਂ ਦਿੱਤੀਆਂ ਗਈਆਂ ਹਨ।

ਮਿਸਾਲ

+------------------------------------------------------------------------------------
| CLIENT SQL ordered by Elapsed Time
+--------------------+----------+----------+----------+----------+----------+--------------------
|        elapsed time|     calls|  % dbtime|     % CPU|      % IO|    dbname|             queryid
+--------------------+----------+----------+----------+----------+----------+--------------------
|            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
+--------------------+----------+----------+----------+----------+----------+--------------------
| CLIENT SQL ordered by CPU Time
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|            cpu time|     calls|  % dbtime|total_time|     % CPU|      % IO|    dbname|             queryid
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|            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
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
| CLIENT SQL ordered by User I/O Wait Time
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|        io_wait time|     calls|  % dbtime|total_time|     % CPU|      % IO|    dbname|             queryid
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|            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
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
| CLIENT SQL ordered by Shared Buffers Reads
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|       buffers reads|     calls|  % dbtime|total_time|     % CPU|      % IO|    dbname|             queryid
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|          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
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
| CLIENT SQL ordered by Disk Reads Time
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|           read time|     calls|  % dbtime|total_time|     % CPU|      % IO|    dbname|             queryid
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|            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
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
| CLIENT SQL ordered by Executions
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|               calls|      rows|  % dbtime|total_time|     % CPU|      % IO|    dbname|             queryid
+--------------------+----------+----------+----------+----------+----------+----------+--------------------
|                 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
+--------------------+----------+----------+----------+----------+----------+----------+--------------------

ਨਤੀਜਾ

ਸਪੁਰਦ ਕੀਤੇ ਸਵਾਲਾਂ ਅਤੇ ਨਤੀਜੇ ਵਜੋਂ ਰਿਪੋਰਟਿੰਗ ਦੀ ਵਰਤੋਂ ਕਰਦੇ ਹੋਏ, ਤੁਸੀਂ ਵਿਅਕਤੀਗਤ ਸਵਾਲਾਂ ਅਤੇ ਸਮੁੱਚੇ ਤੌਰ 'ਤੇ ਪੂਰੇ ਕਲੱਸਟਰ ਲਈ ਕਾਰਗੁਜ਼ਾਰੀ ਵਿੱਚ ਗਿਰਾਵਟ ਦੀਆਂ ਸਮੱਸਿਆਵਾਂ ਦਾ ਵਿਸ਼ਲੇਸ਼ਣ ਕਰਨ ਅਤੇ ਹੱਲ ਕਰਨ ਲਈ ਇੱਕ ਵਧੇਰੇ ਸੰਪੂਰਨ ਤਸਵੀਰ ਪ੍ਰਾਪਤ ਕਰ ਸਕਦੇ ਹੋ।

ਵਿਕਾਸ

ਹੁਣ ਤੱਕ ਦੀਆਂ ਵਿਕਾਸ ਯੋਜਨਾਵਾਂ ਇਸ ਪ੍ਰਕਾਰ ਹਨ:

• ਬਲਾਕਿੰਗ ਇਤਿਹਾਸ ਦੇ ਨਾਲ ਪੂਰਕ ਰਿਪੋਰਟਿੰਗ. ਬੇਨਤੀਆਂ ਦੀ ਜਾਂਚ ਕੀਤੀ ਜਾ ਰਹੀ ਹੈ ਅਤੇ ਜਲਦੀ ਹੀ ਜਮ੍ਹਾਂ ਕਰ ਦਿੱਤੀ ਜਾਵੇਗੀ।
• pg_stat_activity ਅਤੇ pg_locks ਇਤਿਹਾਸ ਨੂੰ ਸਟੋਰ ਕਰਨ ਲਈ TimescaleDB ਐਕਸਟੈਂਸ਼ਨ ਦੀ ਵਰਤੋਂ ਕਰੋ।
• ਉਤਪਾਦਨ ਅਧਾਰਾਂ 'ਤੇ ਪੁੰਜ ਤੈਨਾਤੀ ਲਈ ਗਿਥਬ 'ਤੇ ਪੈਕੇਜ ਹੱਲ ਤਿਆਰ ਕਰੋ।

ਨੂੰ ਜਾਰੀ ਰੱਖਿਆ ਜਾਵੇਗਾ…

ਸਰੋਤ: www.habr.com