Update USER_GUIDE.md
Ibrar Ahmed
GitHub
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@ -152,56 +152,26 @@ bucket | bucket_start_time |
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**`calls`**: Number of calls of that particular query.
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##### Example 1: Shows the userid, dbid, unique queryid hash, query, and the total number of calls of that query.
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##### Example 1: Shows the usename, database name, unique queryid hash, query, and the total number of calls of that query.
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```sql
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SELECT userid, dbid, queryid, substr(query,0, 50) AS query, calls FROM pg_stat_monitor;
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userid | dbid | queryid | query | calls
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--------+-------+------------------+---------------------------------------------------+-------
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10 | 12709 | 214646CE6F9B1A85 | BEGIN | 1577
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10 | 12709 | 8867FEEB8A5388AC | vacuum pgbench_branches | 1
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10 | 12709 | F47D95C9DF863E43 | UPDATE pgbench_branches SET bbalance = bbalance + | 1577
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10 | 12709 | 2FE0A6ABDC20623 | select substr(query,$1, $2) as query, cmd_type fr | 7
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10 | 12709 | A83503D3E1F99139 | select userid, dbid, queryid, substr(query,$1, $ | 1
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10 | 12709 | D4B1243AC3268B9B | select count(*) from pgbench_branches | 1
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10 | 12709 | 2FE0A6ABDC20623 | select substr(query,$1, $2) as query, cmd_type fr | 1
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10 | 12709 | 1D9BDBBCFB89F096 | UPDATE pgbench_accounts SET abalance = abalance + | 1577
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10 | 12709 | 15343084284782B | update test SET a = $1 | 2
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10 | 12709 | 939C2F56E1F6A174 | END | 1577
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1 | 12709 | DAE6D269D27F2EC4 | SELECT FOR UPDATE test SET a = 1; | 1
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10 | 12709 | 2B50C2406BFAC907 | INSERT INTO pgbench_history (tid, bid, aid, delta | 1577
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10 | 12709 | F6DA9838660825CA | vacuum pgbench_tellers | 1
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10 | 12709 | 3AFB8B2452721F9 | SELECT a from test for update | 1
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10 | 12709 | A5CD0AF80D28363 | SELECT abalance FROM pgbench_accounts WHERE aid = | 1577
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10 | 12709 | E445DD36B9189C53 | UPDATE pgbench_tellers SET tbalance = tbalance + | 1577
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10 | 12709 | 4876BBA9A8FCFCF9 | truncate pgbench_history | 1
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10 | 12709 | D3C2299FD9E7348C | select userid, dbid, queryid, query, calls from | 1
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(18 rows)
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```
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postgres=# SELECT userid, datname, queryid, substr(query,0, 50) AS query, calls FROM pg_stat_monitor;
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userid | datname | queryid | query | calls
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---------+----------+------------------+---------------------------------------------------+-------
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vagrant | postgres | 939C2F56E1F6A174 | END | 561
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vagrant | postgres | 2A4437C4905E0E23 | SELECT abalance FROM pgbench_accounts WHERE aid = | 561
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vagrant | postgres | 4EE9ED0CDF143477 | SELECT userid, datname, queryid, substr(query,$1 | 1
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vagrant | postgres | 8867FEEB8A5388AC | vacuum pgbench_branches | 1
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vagrant | postgres | 41D1168FB0733CAB | select count(*) from pgbench_branches | 1
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vagrant | postgres | E5A889A8FF37C2B1 | UPDATE pgbench_accounts SET abalance = abalance + | 561
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vagrant | postgres | 4876BBA9A8FCFCF9 | truncate pgbench_history | 1
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vagrant | postgres | 22B76AE84689E4DC | INSERT INTO pgbench_history (tid, bid, aid, delta | 561
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vagrant | postgres | F6DA9838660825CA | vacuum pgbench_tellers | 1
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vagrant | postgres | 214646CE6F9B1A85 | BEGIN | 561
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vagrant | postgres | 27462943E814C5B5 | UPDATE pgbench_tellers SET tbalance = tbalance + | 561
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vagrant | postgres | 4F66D46F3D4151E | SELECT userid, dbid, queryid, substr(query,0, 50 | 1
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vagrant | postgres | 6A02C123488B95DB | UPDATE pgbench_branches SET bbalance = bbalance + | 561
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(13 rows)
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##### Example 2: Shows different usernames for the query.
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```
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SELECT userid::regrole, datname, substr(query,0, 50) AS query, calls from pg_stat_monitor, pg_database WHERE dbid = oid;
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userid | datname | query | calls
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----------+----------+---------------------------------------------------+-------
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vagrant | postgres | select userid::regrole, datname, substr(query,$1, | 1
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vagrant | test_db | insert into bar values($1) | 1
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vagrant | postgres | insert into bar values($1) | 1
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vagrant | test_db | select * from bar | 1
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postgres | postgres | insert into bar values($1) | 1
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(5 rows)
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```
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##### Example 3: Shows the different databases involved in the queries.
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```
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SELECT userid::regrole, datname, substr(query,0, 50) as query, calls from pg_stat_monitor, pg_database WHERE dbid = oid;
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userid | datname | query | calls
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---------+----------+---------------------------------------------------+-------
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vagrant | postgres | select userid::regrole, datname, substr(query,$1, | 0
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vagrant | test_db | insert into bar values($1) | 1
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vagrant | test_db | select * from bar | 1
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(3 rows)
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```
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##### Example 4: Shows the connected application_name.
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@ -307,16 +277,22 @@ There are 10 timebase buckets of the time **`pg_stat_monitor.pgsm_respose_time_s
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##### Example 1: List all the table names involved in the query.
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```sql
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SELECT relations::oid[]::regclass[], query FROM pg_stat_monitor;
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relations | query
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--------------------+------------------------------------------------------------------------------------------------------
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{pgbench_accounts} | UPDATE pgbench_accounts SET abalance = abalance + $1 WHERE aid = $2
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{pgbench_accounts} | SELECT abalance FROM pgbench_accounts WHERE aid = $1
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{pg_stat_monitor} | select relations::oid[]::regclass[], cmd_type,resp_calls,query from pg_stat_monitor
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{pgbench_branches} | select count(*) from pgbench_branches
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{pgbench_history} | INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
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{foo,bar} | select * from foo,bar
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(5 rows)
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postgres=# SELECT relations,query FROM pg_stat_monitor;
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relations | query
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-------------------------------+------------------------------------------------------------------------------------------------------
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| END
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{pgbench_accounts} | SELECT abalance FROM pgbench_accounts WHERE aid = $1
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| vacuum pgbench_branches
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{pgbench_branches} | select count(*) from pgbench_branches
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{pgbench_accounts} | UPDATE pgbench_accounts SET abalance = abalance + $1 WHERE aid = $2
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| truncate pgbench_history
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{pgbench_history} | INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
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{pg_stat_monitor,pg_database} | SELECT relations query FROM pg_stat_monitor
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| vacuum pgbench_tellers
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| BEGIN
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{pgbench_tellers} | UPDATE pgbench_tellers SET tbalance = tbalance + $1 WHERE tid = $2
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{pgbench_branches} | UPDATE pgbench_branches SET bbalance = bbalance + $1 WHERE bid = $2
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(12 rows)
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```
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##### Example 2: List all the views and the name of the table in the view. Here we have a view "test_view"
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@ -336,7 +312,7 @@ View definition:
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Now when we query the pg_stat_monitor, it will show the view name and also all the table names in the view.
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```sql
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SELECT relations::oid[]::regclass[], query FROM pg_stat_monitor;
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SELECT relations, query FROM pg_stat_monitor;
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relations | query
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---------------------+------------------------------------------------------------------------------------------------------
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{test_view,foo,bar} | select * from test_view
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@ -349,20 +325,22 @@ SELECT relations::oid[]::regclass[], query FROM pg_stat_monitor;
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**`cmd_type`**: List the command type of the query.
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```sql
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SELECT bucket, substr(query,0, 50) AS query, cmd_type FROM pg_stat_monitor WHERE elevel = 0;
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bucket | query | cmd_type
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postgres=# SELECT bucket, substr(query,0, 50) AS query, cmd_type FROM pg_stat_monitor WHERE elevel = 0;
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bucket | query | cmd_type
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--------+---------------------------------------------------+----------
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1 | vacuum analyze pgbench_history |
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1 | alter table pgbench_tellers add primary key (tid) |
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1 | insert into pgbench_tellers(tid,bid,tbalance) val | INSERT
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1 | select * from tt for update | UPDATE
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1 | update tt set a = $1 | UPDATE
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1 | delete from tt | DELETE
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1 | insert into pgbench_branches(bid,bbalance) values | INSERT
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1 | begin |
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1 | drop table if exists pgbench_accounts, pgbench_br |
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1 | copy pgbench_accounts from stdin | INSERT
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1 | create table pgbench_history(tid int,bid int,aid |
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1 | SELECT bucket, substr(query,$1, $2) AS query, cmd | SELECT
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(12 rows)
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4 | END |
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4 | SELECT abalance FROM pgbench_accounts WHERE aid = | SELECT
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4 | vacuum pgbench_branches |
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4 | select count(*) from pgbench_branches | SELECT
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4 | UPDATE pgbench_accounts SET abalance = abalance + | UPDATE
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4 | truncate pgbench_history |
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4 | INSERT INTO pgbench_history (tid, bid, aid, delta | INSERT
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5 | SELECT relations query FROM pg_stat_monitor | SELECT
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9 | SELECT bucket, substr(query,$1, $2) AS query, cmd |
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4 | vacuum pgbench_tellers |
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4 | BEGIN |
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5 | SELECT relations,query FROM pg_stat_monitor | SELECT
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4 | UPDATE pgbench_tellers SET tbalance = tbalance + | UPDATE
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4 | UPDATE pgbench_branches SET bbalance = bbalance + | UPDATE
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(14 rows)
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```
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