🥇 PostgreSQL मधील वर्कलोड प्रोफाइल आणि प्रतीक्षा इतिहास मिळवण्याच्या पद्धतींपैकी एक

लेख सुरू ठेवणे "PostgreSQL साठी ASH चे अॅनालॉग तयार करण्याचा प्रयत्न ".

pg_stat_activity दृश्याचा इतिहास वापरून कोणती उपयुक्त माहिती मिळवता येते हे लेख विशिष्ट क्वेरी आणि उदाहरणे वापरून तपासेल आणि दर्शवेल.

चेतावणी
विषयाच्या नवीनतेमुळे आणि चाचणी कालावधीच्या अपूर्णतेमुळे, लेखात त्रुटी असू शकतात. टीका आणि टिप्पण्या स्वागतार्ह आणि अपेक्षित आहेत.

इनपुट डेटा

pg_stat_statements सबमिशन इतिहास

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 );

लक्ष्य डेटाबेसवर dblink वापरून टेबल दर तासाला भरले जाते. टेबलमधील सर्वात मनोरंजक आणि उपयुक्त स्तंभ, अर्थातच queryid.

pg_stat_activity पाहण्याचा इतिहास

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
);

सारणी तासानुसार विभाजित केलेली history_pg_stat_activity सारणी आहे (अधिक तपशील येथे - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? आणि इथे - PostgreSQL साठी ASH चे अॅनालॉग तयार करण्याचा प्रयत्न.)

आउटपुट

क्लस्टर CPU वेळ (सिस्टम + क्लायंट)

चौकशी

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 ;

उदाहरण:

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

क्लस्टर प्रतीक्षा वेळ

चौकशी

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 ;

उदाहरण:

CLUSTER WAITINGS TIME : 30:12:49

एकूण pg_stat_statements मूल्ये

चौकशी

 --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 - एकूण क्वेरी अंमलबजावणी वेळ

चौकशी

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

उदाहरण:

SQL DBTIME : 136:49:36

SQL CPU TIME - क्वेरी कार्यान्वित करण्यासाठी CPU वेळ घालवला

चौकशी

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 ;

उदाहरण:

SQL CPU TIME : 27:40:15

SQL प्रतीक्षा वेळ - प्रश्नांसाठी एकूण प्रतीक्षा वेळ

चौकशी

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 ;

उदाहरण:

SQL WAITINGS TIME : 30:04:09

खालील क्वेरी क्षुल्लक आहेत आणि जागा वाचवण्यासाठी अंमलबजावणी तपशील वगळले आहेत:

उदाहरण:

| 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

चला सर्वात मनोरंजक विभागाकडे जाऊया

प्रतीक्षा स्थिर

क्लायंट प्रक्रियेसाठी एकूण प्रतीक्षा वेळेनुसार शीर्ष 10 प्रतीक्षा

चौकशी

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

उदाहरण:

+---------------------------------------------------------------- ----------------------------------- | सिस्टम प्रक्रियेसाठी एकूण प्रतीक्षा वेळेनुसार शीर्ष 10 प्रतीक्षा +------+------------------------------- ------------------+---------------------- | #| प्रतीक्षा_इव्हेंट_प्रकार| प्रतीक्षा_इव्हेंट| कालावधी +------+----------------------------+------------ -------+------------ | 1| क्रियाकलाप| लॉजिकल लाँचरमेन| 10:43:28 | 2| क्रियाकलाप| AutoVacuumMain| 10:42:49 | ३| क्रियाकलाप| WalWriterMain| 3:10:28 | 53| क्रियाकलाप| चेकपॉइंटरमेन| 4:10:23 | ५| क्रियाकलाप| BgWriterMain| 50:5:09 | ६| क्रियाकलाप| BgWriterHibernate| 11:59:6 | ७| IO| बफफाइलराईट| 01:37:46 | ८| LWLock| बफर_मॅपिंग| 7:00:02 | ९| IO| DataFileRead| 35:8:00 | 01| IO| वॉलराइट| 54:9:00 +------+-------------------------------+--------- -------------+------------

क्लायंट प्रक्रियेसाठी एकूण प्रतीक्षा वेळेनुसार शीर्ष 10 प्रतीक्षा

चौकशी

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

उदाहरण:

+------------ +---------------------------- +--------- ------------+----------+------------ | #| प्रतीक्षा_इव्हेंट_प्रकार| प्रतीक्षा_इव्हेंट| कालावधी| % dbtime +------+--------------------------------------------+--------- ----------+------------+--------- | 1| लॉक | transactionid| 08:16:47 | ६.०५ | 6.05| IO| DataFileRead| 2:06:13| ४.५५ | ३| कालबाह्य | PgSleep| 41:4.55:3| 02 | 53| LWLock| बफर_मॅपिंग| 21:2.11:4| 00 | ५| LWLock| buffer_io| 40:42:0.5| 5 | ६| IO| बफफाइलराईट| 00:17:17| ०.०२ | ७| लॉक | टपल | 0.21:6:00| ०.०२ | ८| ग्राहक| ClientRead| 01:34:0.02 | ०.०२ | ९| IO| बफफाइलरीड| 7:00:01| ०.०१ | 32| LWLock| बफर_सामग्री| 0.02:8:00| 01 +------+-----------------------------------------+------------ -------+------------+---------

सिस्टम प्रक्रियेसाठी, एकूण प्रतीक्षा वेळेनुसार प्रतीक्षाचे प्रकार

चौकशी

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

उदाहरण:

+------------ +---------------------------- +--------- --- -------- | #| प्रतीक्षा_इव्हेंट_प्रकार| कालावधी +------+----------------------------+------------ ------- | 1| क्रियाकलाप| 53:08:45 | 2| IO| 00:06:24 | ३| LWLock| 3:00:03 +------+-----------------------------------------+--------- -------------

क्लायंटच्या प्रक्रियेसाठी एकूण प्रतीक्षा वेळेनुसार प्रतीक्षाचे प्रकार

चौकशी

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

उदाहरण:

+------------ +---------------------------- +--------- ------------+---------- | #| प्रतीक्षा_इव्हेंट_प्रकार| कालावधी| % dbtime +------+--------------------------------------------+--------- ----------+---------------------- | 1| लॉक | 08:18:19 | ६.०७ | 6.07| IO| 2:06:16| ४.५८ | ३| कालबाह्य | 01:4.58:3| 02 | 53| LWLock| 21:2.11:4| 00 | ५| ग्राहक| 58:12:0.71 | ०.०२ | ६| IPC| 5:00:01| 19 +------+-----------------------------------------+------------ ------------------------------

सिस्टम प्रक्रिया आणि वैयक्तिक विनंत्यांसाठी कालावधी प्रतीक्षा करा.

सिस्टम प्रक्रियेची प्रतीक्षा

चौकशी

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

उदाहरण:

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

एसक्यूएलसाठी प्रतीक्षा - queryid द्वारे वैयक्तिक प्रश्नांची प्रतीक्षा करते

चौकशी

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

उदाहरण:

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

क्लायंट SQL स्टॅटिकिक्स - शीर्ष क्वेरी

प्राप्त करण्याच्या विनंत्या पुन्हा क्षुल्लक आहेत आणि जागा वाचवण्यासाठी दिल्या जात नाहीत.

उदाहरणे

+------------------------------------------------------------------------------------
| 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
+--------------------+----------+----------+----------+----------+----------+----------+--------------------

परिणाम

सबमिट केलेल्या प्रश्नांचा आणि परिणामी अहवालाचा वापर करून, वैयक्तिक प्रश्नांसाठी आणि संपूर्ण क्लस्टरसाठी कार्यक्षमतेच्या ऱ्हासाच्या समस्यांचे विश्लेषण आणि निराकरण करण्यासाठी तुम्ही अधिक संपूर्ण चित्र मिळवू शकता.

विकास

आतापर्यंतच्या विकास योजना पुढीलप्रमाणे आहेत.

ब्लॉकिंग इतिहासासह पूरक अहवाल. विनंत्या तपासल्या जात आहेत आणि लवकरच सबमिट केल्या जातील.
pg_stat_activity आणि pg_locks इतिहास संचयित करण्यासाठी TimescaleDB विस्तार वापरा.
उत्पादन तळांवर मोठ्या प्रमाणात उपयोजन करण्यासाठी गिथबवर पॅकेज सोल्यूशन तयार करा.

पुढे चालू…

स्त्रोत: www.habr.com

PostgreSQL मध्ये वर्कलोड प्रोफाइल आणि प्रतीक्षा इतिहास मिळविण्यासाठी एक पद्धत

इनपुट डेटा

pg_stat_statements सबमिशन इतिहास

pg_stat_activity पाहण्याचा इतिहास

आउटपुट

क्लस्टर CPU वेळ (सिस्टम + क्लायंट)

क्लस्टर प्रतीक्षा वेळ

एकूण pg_stat_statements मूल्ये

SQL DBTIME - एकूण क्वेरी अंमलबजावणी वेळ

SQL CPU TIME - क्वेरी कार्यान्वित करण्यासाठी CPU वेळ घालवला

SQL प्रतीक्षा वेळ - प्रश्नांसाठी एकूण प्रतीक्षा वेळ

प्रतीक्षा स्थिर

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एसक्यूएलसाठी प्रतीक्षा - queryid द्वारे वैयक्तिक प्रश्नांची प्रतीक्षा करते

क्लायंट SQL स्टॅटिकिक्स - शीर्ष क्वेरी

परिणाम

विकास

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