🥇 PostgreSQL मा वर्कलोड प्रोफाइल र पर्खाइ इतिहास प्राप्त गर्ने तरिकाहरू मध्ये एक

लेखको निरन्तरता "PostgreSQL को लागि ASH एनालग सिर्जना गर्ने प्रयास "।

लेखले विशेष प्रश्नहरू र उदाहरणहरू प्रयोग गरेर, pg_stat_activity दृश्यको इतिहास प्रयोग गरेर कुन उपयोगी जानकारी प्राप्त गर्न सकिन्छ भनेर जाँच गरी देखाउनेछ।

चेतावनी
विषयको नवीनता र अधूरो परीक्षण अवधिको कारणले गर्दा, लेखमा त्रुटिहरू हुन सक्छन्। आलोचना र टिप्पणीहरू दृढतापूर्वक स्वागत र अपेक्षा गरिन्छ।

इनपुट डाटा

pg_stat_statements पेश गर्ने 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 );

तालिका प्रत्येक घण्टा लक्षित डाटाबेसमा dblink प्रयोग गरेर भरिएको छ। तालिकामा सबैभन्दा रोचक र उपयोगी स्तम्भ, अवश्य पनि queryid.

pg_stat_activity हेर्ने 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
);

तालिका घन्टा द्वारा विभाजन गरिएको इतिहास_pg_stat_activity तालिका हो (थप विवरण यहाँ - pg_stat_statements + pg_stat_activity + loq_query = pg_ash? र यहाँ - PostgreSQL को लागि ASH को एनालग सिर्जना गर्ने प्रयास।)

निर्गत

क्लस्टर CPU समय (प्रणाली + ग्राहकहरू)

अनुरोध

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 समय

अनुरोध

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

कुल pg_stat_statements मानहरू

अनुरोध

 --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 - कुल क्वेरी कार्यान्वयन समय

अनुरोध

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

उदाहरण:

SQL DBTIME : 136:49:36

SQL CPU TIME - CPU समय बिताएको प्रश्नहरू कार्यान्वयन गर्न

अनुरोध

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 समय - प्रश्नहरूको लागि कुल प्रतीक्षा समय

अनुरोध

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

निम्न प्रश्नहरू मामूली छन् र स्थान बचत गर्न कार्यान्वयन विवरणहरू हटाइएका छन्:

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

सबैभन्दा रोचक खण्डमा जाऔं

प्रतीक्षा स्थिर

ग्राहक प्रक्रियाहरूको लागि कुल प्रतीक्षा समय द्वारा शीर्ष 10 प्रतिक्षाहरू

अनुरोध

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:

+------------------------------------------------ ----------------------------------- | प्रणाली प्रक्रियाहरूको लागि कुल पर्खने समय द्वारा शीर्ष 10 प्रतिक्षाहरू +------+---------------+--- ------------------+---------------------- | #| प्रतीक्षा_घटना_प्रकार| प्रतीक्षा_घटना | अवधि +------+----------------------------+------------ -------+------------ | १| गतिविधि | LogicalLauncherMain| १०:४३:२८ | २| गतिविधि | AutoVacuumMain| १०:४२:४९ | ३| गतिविधि | WalWriterMain | १०:२८:५३ | ४| गतिविधि | CheckpointerMain| १०:२३:५० | ५| गतिविधि | BgWriterMain| ०९:११:५९ | ६| गतिविधि | BgWriterHibernate| ०१:३७:४६ | ७ | IO| बफफाइलराइट| 1:10:43 | ८| LWLock | buffer_mapping | 28:2:10 | ९| IO| DataFileRead| 42:49:3 | १०| IO| WALWrite | 10:28:53 +------+-----------------------------------------+------ --------------+------------

ग्राहक प्रक्रियाहरूको लागि कुल प्रतीक्षा समय द्वारा शीर्ष 10 प्रतिक्षाहरू

अनुरोध

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_घटना_प्रकार| प्रतीक्षा_घटना | अवधि | % dbtime +------+--------------------------------------------+--------- -----------+--------- +------------ | १| ताला | लेनदेन ०८:१६:४७ | ६.०५ | २| IO| DataFileRead| ०६:१३:४१ | ४.५५ | ३| टाइमआउट | PgSleep | ०२:५३:२१ | 1 | ४| LWLock | buffer_mapping | 08:16:47 | ०.५ | ५| LWLock | buffer_io| 6.05:2:06 | ०.२१ | ६| IO| बफफाइलराइट| 13:41:4.55 | ०.०२ | ७ | ताला | टपल | 3:02:53 | ०.०२ | ८| ग्राहक | ग्राहक पढ्नुहोस् | 21:2.11:4 | ०.०२ | ९| IO| बफफाइलरीड| 00:40:42 | ०.०१ | १०| LWLock | buffer_content | 0.5:5:00 | ० +------+----------------------------+------------ --------+------------+---------

प्रणाली प्रक्रियाहरूको लागि कुल पर्खने समय द्वारा प्रतीक्षा प्रकारहरू

अनुरोध

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_घटना_प्रकार| अवधि +------+----------------------------+------------ ------- | १| गतिविधि | ५३:०८:४५ | २| IO| 1:53:08 | ३| LWLock | 45:2:00 +------+-----------------------------------------+------ --------------

कुल प्रतीक्षा समय द्वारा प्रतीक्षा प्रकार, ग्राहक प्रक्रियाहरु को लागी

अनुरोध

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_घटना_प्रकार| अवधि | % dbtime +------+--------------------------------------------+--------- -----------+---------------------- | १| ताला | ०८:१८:१९ | ६.०७ | २| IO| ०६:१६:०१ | ४.५८ | ३| टाइमआउट | ०२:५३:२१ | 1 | ४| LWLock | 08:18:19 | ०.७१ | ५| ग्राहक | 6.07:2:06 | ०.०२ | ६| आईपीसी| 16:01:4.58 | ० +------+----------------------------+------------ -------------------------------------------

प्रणाली प्रक्रियाहरू र व्यक्तिगत अनुरोधहरूको लागि अवधि पर्खनुहोस्।

प्रणाली प्रक्रियाहरूको लागि प्रतीक्षा गर्दै

अनुरोध

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
+-----+-----------------------------+----------+--------------------+----------------------+--------------------

SQL को लागि पर्खनुहोस् - queryid द्वारा व्यक्तिगत प्रश्नहरूको लागि पर्खन्छ

अनुरोध

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

ग्राहक SQL STATICTICS - शीर्ष प्रश्नहरू

प्राप्त गर्नका लागि अनुरोधहरू फेरि तुच्छ छन् र ठाउँ बचत गर्न दिइएको छैन।

उदाहरण

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

पेश गरिएका प्रश्नहरू र नतिजा रिपोर्टिङ प्रयोग गरेर, तपाईंले व्यक्तिगत प्रश्नहरू र समग्र रूपमा सम्पूर्ण क्लस्टरका लागि कार्यसम्पादन गिरावटको समस्याहरूको विश्लेषण र समाधानका लागि थप पूर्ण तस्वीर प्राप्त गर्न सक्नुहुन्छ।

विकास

हालसम्मका विकास योजनाहरु यस प्रकार रहेका छन् ।

अवरुद्ध इतिहास संग रिपोर्टिङ पूरक। अनुरोधहरू परीक्षण भइरहेको छ र छिट्टै पेश गरिनेछ।
pg_stat_activity र pg_locks इतिहास भण्डारण गर्न TimescaleDB विस्तार प्रयोग गर्नुहोस्।
उत्पादन आधारहरूमा ठूलो परिनियोजनको लागि github मा प्याकेज समाधान तयार गर्नुहोस्।

फेरि जारी राखौंला…

स्रोत: www.habr.com

PostgreSQL मा कार्यभार प्रोफाइल र प्रतीक्षा इतिहास प्राप्त गर्न को लागी एक विधि

इनपुट डाटा

pg_stat_statements पेश गर्ने इतिहास

pg_stat_activity हेर्ने इतिहास

निर्गत

क्लस्टर CPU समय (प्रणाली + ग्राहकहरू)

क्लस्टर प्रतीक्षा समय

कुल pg_stat_statements मानहरू

SQL DBTIME - कुल क्वेरी कार्यान्वयन समय

SQL CPU TIME - CPU समय बिताएको प्रश्नहरू कार्यान्वयन गर्न

SQL प्रतीक्षा समय - प्रश्नहरूको लागि कुल प्रतीक्षा समय

प्रतीक्षा स्थिर

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कुल प्रतीक्षा समय द्वारा प्रतीक्षा प्रकार, ग्राहक प्रक्रियाहरु को लागी

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ग्राहक SQL STATICTICS - शीर्ष प्रश्नहरू

परिणाम

विकास

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