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pg_stat_monitor
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pull/565/head
Oliver Rice 2025-09-21 09:15:06 -05:00
parent 982b1304d3
commit 02f2e9e5ce
6 changed files with 5 additions and 451 deletions
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39
pg_stat_monitor.c
View File

@ -247,6 +247,7 @@ static void fill_in_constant_lengths(JumbleState *jstate, const char *query, int
static int comp_location(const void *a, const void *b);
static uint64 get_next_wbucket(pgsmSharedState *pgsm);
static void pgsm_log_bucket_json(uint64 bucket_id);
/*
* To prevent deadlocks against our own backend we need to disable error
@ -3966,47 +3967,17 @@ pgsm_lock_release(pgsmSharedState *pgsm)
LWLockRelease(pgsm->lock);
}
/*
* Log bucket data as JSON to PostgreSQL log
*/
static void
pgsm_log_bucket_json(uint64 bucket_id)
{
pgsmSharedState *pgsm = pgsm_get_ss();
HASH_SEQ_STATUS hash_seq;
pgsmEntry *entry;
bool first_entry = true;
if (!pgsm_enable_json_log)
return;
/* Start JSON object for the bucket */
elog(LOG, "[pg_stat_monitor] JSON export bucket %lu: {\"bucket_id\": %lu, \"queries\": [",
bucket_id, bucket_id);
pgsm_lock_aquire(pgsm, LW_SHARED);
hash_seq_init(&hash_seq, pgsm->hash);
while ((entry = hash_seq_search(&hash_seq)) != NULL)
{
/* Only export entries from the specified bucket */
if (entry->key.bucket_id != bucket_id)
continue;
if (!first_entry)
elog(LOG, "[pg_stat_monitor] JSON export: ,");
else
first_entry = false;
/* Log a simplified JSON object for each query */
elog(LOG, "[pg_stat_monitor] JSON export: {\"query_id\": %lu, \"calls\": %lu, \"total_time\": %.3f, \"query\": \"%s\"}",
entry->key.queryid, entry->counters.calls,
entry->counters.total_exec_time,
entry->query_len > 0 ? pgsm_get_query_text(entry, NULL, NULL) : "");
}
pgsm_lock_release(pgsm);
/* Close JSON array and object */
elog(LOG, "[pg_stat_monitor] JSON export: ]}");
/* Log a simple JSON message for bucket rotation */
elog(LOG, "[pg_stat_monitor] JSON export: {\"event\": \"bucket_rotation\", \"bucket_id\": %lu, \"timestamp\": \"%ld\"}",
bucket_id, time(NULL));
}

134
regression.diffs
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@ -1,134 +0,0 @@
diff -U3 /Users/oliverrice/Documents/supabase/pg_stat_monitor/regression/expected/basic.out /Users/oliverrice/Documents/supabase/pg_stat_monitor/results/basic.out
--- /Users/oliverrice/Documents/supabase/pg_stat_monitor/regression/expected/basic.out 2025-09-20 13:48:01
+++ /Users/oliverrice/Documents/supabase/pg_stat_monitor/results/basic.out 2025-09-20 13:54:55
@@ -12,11 +12,9 @@
(1 row)
SELECT query FROM pg_stat_monitor ORDER BY query COLLATE "C";
- query
---------------------------------
- SELECT 1 AS num
- SELECT pg_stat_monitor_reset()
-(2 rows)
+ query
+-------
+(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
diff -U3 /Users/oliverrice/Documents/supabase/pg_stat_monitor/regression/expected/counters.out /Users/oliverrice/Documents/supabase/pg_stat_monitor/results/counters.out
--- /Users/oliverrice/Documents/supabase/pg_stat_monitor/regression/expected/counters.out 2025-09-20 13:48:01
+++ /Users/oliverrice/Documents/supabase/pg_stat_monitor/results/counters.out 2025-09-20 13:54:55
@@ -37,11 +37,9 @@
(0 rows)
SELECT query, sum(calls) as calls FROM pg_stat_monitor GROUP BY query ORDER BY query COLLATE "C";
- query | calls
----------------------------------------------------------------------------------+-------
- SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a | 4
- SELECT pg_stat_monitor_reset() | 1
-(2 rows)
+ query | calls
+-------+-------
+(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -60,21 +58,9 @@
end loop;
end $$;
SELECT query, sum(calls) as calls FROM pg_stat_monitor GROUP BY query ORDER BY query COLLATE "C";
- query | calls
----------------------------------------------------------------------------------------------------+-------
- SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a | 1000
- SELECT pg_stat_monitor_reset() | 1
- do $$ +| 1
- declare +|
- n integer:= 1; +|
- begin +|
- loop +|
- PERFORM a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;+|
- exit when n = 1000; +|
- n := n + 1; +|
- end loop; +|
- end $$ |
-(3 rows)
+ query | calls
+-------+-------
+(0 rows)
DROP TABLE t1;
DROP TABLE t2;
diff -U3 /Users/oliverrice/Documents/supabase/pg_stat_monitor/regression/expected/relations.out /Users/oliverrice/Documents/supabase/pg_stat_monitor/results/relations.out
--- /Users/oliverrice/Documents/supabase/pg_stat_monitor/regression/expected/relations.out 2025-09-20 13:48:01
+++ /Users/oliverrice/Documents/supabase/pg_stat_monitor/results/relations.out 2025-09-20 13:54:55
@@ -37,14 +37,9 @@
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
- query | relations
---------------------------------------+---------------------------------------------------
- SELECT * FROM foo1 | {public.foo1}
- SELECT * FROM foo1, foo2 | {public.foo1,public.foo2}
- SELECT * FROM foo1, foo2, foo3 | {public.foo1,public.foo2,public.foo3}
- SELECT * FROM foo1, foo2, foo3, foo4 | {public.foo1,public.foo2,public.foo3,public.foo4}
- SELECT pg_stat_monitor_reset() |
-(5 rows)
+ query | relations
+-------+-----------
+(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -88,14 +83,9 @@
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
- query | relations
-----------------------------------------------------------+-------------------------------------------
- SELECT * FROM sch1.foo1 | {sch1.foo1}
- SELECT * FROM sch1.foo1, sch2.foo2 | {sch1.foo1,sch2.foo2}
- SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3 | {sch1.foo1,sch2.foo2,sch3.foo3}
- SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3, sch4.foo4 | {sch1.foo1,sch2.foo2,sch3.foo3,sch4.foo4}
- SELECT pg_stat_monitor_reset() |
-(5 rows)
+ query | relations
+-------+-----------
+(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -120,12 +110,9 @@
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query;
- query | relations
-------------------------------------------------+-----------------------------------------------
- SELECT * FROM sch1.foo1, foo1 | {sch1.foo1,public.foo1}
- SELECT * FROM sch1.foo1, sch2.foo2, foo1, foo2 | {sch1.foo1,sch2.foo2,public.foo1,public.foo2}
- SELECT pg_stat_monitor_reset() |
-(3 rows)
+ query | relations
+-------+-----------
+(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -165,14 +152,9 @@
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
- query | relations
---------------------------------+-----------------------------------------------------------------------------------------------
- SELECT * FROM v1 | {public.v1*,public.foo1}
- SELECT * FROM v1,v2 | {public.v1*,public.foo1,public.v2*,public.foo2}
- SELECT * FROM v1,v2,v3 | {public.v1*,public.foo1,public.v2*,public.foo2,public.v3*,public.foo3}
- SELECT * FROM v1,v2,v3,v4 | {public.v1*,public.foo1,public.v2*,public.foo2,public.v3*,public.foo3,public.v4*,public.foo4}
- SELECT pg_stat_monitor_reset() |
-(5 rows)
+ query | relations
+-------+-----------
+(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

8
regression.out
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@ -1,8 +0,0 @@
# using postmaster on Unix socket, default port
not ok 1 - basic 41 ms
not ok 2 - counters 36 ms
not ok 3 - relations 41 ms
1..3
# 3 of 3 tests failed.
# The differences that caused some tests to fail can be viewed in the file "/Users/oliverrice/Documents/supabase/pg_stat_monitor/regression.diffs".
# A copy of the test summary that you see above is saved in the file "/Users/oliverrice/Documents/supabase/pg_stat_monitor/regression.out".

25
results/basic.out
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@ -1,25 +0,0 @@
CREATE EXTENSION pg_stat_monitor;
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT 1 AS num;
num
-----
1
(1 row)
SELECT query FROM pg_stat_monitor ORDER BY query COLLATE "C";
query
-------
(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
DROP EXTENSION pg_stat_monitor;

69
results/counters.out
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@ -1,69 +0,0 @@
CREATE EXTENSION pg_stat_monitor;
Set pg_stat_monitor.pgsm_track='all';
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
CREATE TABLE t1 (a INTEGER);
CREATE TABLE t2 (b INTEGER);
CREATE TABLE t3 (c INTEGER);
CREATE TABLE t4 (d INTEGER);
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT query, sum(calls) as calls FROM pg_stat_monitor GROUP BY query ORDER BY query COLLATE "C";
query | calls
-------+-------
(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
do $$
declare
n integer:= 1;
begin
loop
PERFORM a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
exit when n = 1000;
n := n + 1;
end loop;
end $$;
SELECT query, sum(calls) as calls FROM pg_stat_monitor GROUP BY query ORDER BY query COLLATE "C";
query | calls
-------+-------
(0 rows)
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
DROP TABLE t4;
DROP EXTENSION pg_stat_monitor;

181
results/relations.out
View File

@ -1,181 +0,0 @@
CREATE EXTENSION pg_stat_monitor;
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
CREATE TABLE foo1(a int);
CREATE TABLE foo2(b int);
CREATE TABLE foo3(c int);
CREATE TABLE foo4(d int);
-- test the simple table names
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT * FROM foo1;
a
---
(0 rows)
SELECT * FROM foo1, foo2;
a | b
---+---
(0 rows)
SELECT * FROM foo1, foo2, foo3;
a | b | c
---+---+---
(0 rows)
SELECT * FROM foo1, foo2, foo3, foo4;
a | b | c | d
---+---+---+---
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
query | relations
-------+-----------
(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
-- test the schema qualified table
CREATE SCHEMA sch1;
CREATE SCHEMA sch2;
CREATE SCHEMA sch3;
CREATE SCHEMA sch4;
CREATE TABLE sch1.foo1(a int);
CREATE TABLE sch2.foo2(b int);
CREATE TABLE sch3.foo3(c int);
CREATE TABLE sch4.foo4(d int);
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT * FROM sch1.foo1;
a
---
(0 rows)
SELECT * FROM sch1.foo1, sch2.foo2;
a | b
---+---
(0 rows)
SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3;
a | b | c
---+---+---
(0 rows)
SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3, sch4.foo4;
a | b | c | d
---+---+---+---
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
query | relations
-------+-----------
(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT * FROM sch1.foo1, foo1;
a | a
---+---
(0 rows)
SELECT * FROM sch1.foo1, sch2.foo2, foo1, foo2;
a | b | a | b
---+---+---+---
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query;
query | relations
-------+-----------
(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
-- test the view
CREATE VIEW v1 AS SELECT * from foo1;
CREATE VIEW v2 AS SELECT * from foo1,foo2;
CREATE VIEW v3 AS SELECT * from foo1,foo2,foo3;
CREATE VIEW v4 AS SELECT * from foo1,foo2,foo3,foo4;
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT * FROM v1;
a
---
(0 rows)
SELECT * FROM v1,v2;
a | a | b
---+---+---
(0 rows)
SELECT * FROM v1,v2,v3;
a | a | b | a | b | c
---+---+---+---+---+---
(0 rows)
SELECT * FROM v1,v2,v3,v4;
a | a | b | a | b | c | a | b | c | d
---+---+---+---+---+---+---+---+---+---
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
query | relations
-------+-----------
(0 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
DROP VIEW v1;
DROP VIEW v2;
DROP VIEW v3;
DROP VIEW v4;
DROP TABLE foo1;
DROP TABLE foo2;
DROP TABLE foo3;
DROP TABLE foo4;
DROP TABLE sch1.foo1;
DROP TABLE sch2.foo2;
DROP TABLE sch3.foo3;
DROP TABLE sch4.foo4;
DROP SCHEMA sch1;
DROP SCHEMA sch2;
DROP SCHEMA sch3;
DROP SCHEMA sch4;
DROP EXTENSION pg_stat_monitor;