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PG-1907 Add columns to track parallel worker activity

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These are the same counters as were intorduced in pg_stat_statements in
commit cf54a2c.
This commit is contained in:
Artem Gavrilov
2025-09-18 19:04:42 +02:00
committed by Artem Gavrilov
parent 9496937c9f
commit bd0546b7c9
10 changed files with 157 additions and 7 deletions
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36
pg_stat_monitor.c
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@@ -49,7 +49,7 @@ PG_MODULE_MAGIC;
#define PG_STAT_MONITOR_COLS_V1_0 52
#define PG_STAT_MONITOR_COLS_V2_0 64
#define PG_STAT_MONITOR_COLS_V2_1 70
#define PG_STAT_MONITOR_COLS_V2_3 71
#define PG_STAT_MONITOR_COLS_V2_3 73
#define PG_STAT_MONITOR_COLS PG_STAT_MONITOR_COLS_V2_3 /* maximum of above */
#define PGSM_TEXT_FILE PGSTAT_STAT_PERMANENT_DIRECTORY "pg_stat_monitor_query"
@@ -230,6 +230,8 @@ static void pgsm_update_entry(pgsmEntry *entry,
BufferUsage *bufusage,
WalUsage *walusage,
const struct JitInstrumentation *jitusage,
int parallel_workers_to_launch,
int parallel_workers_launched,
bool reset,
pgsmStoreKind kind);
static void pgsm_store(pgsmEntry *entry);
@@ -783,6 +785,13 @@ pgsm_ExecutorEnd(QueryDesc *queryDesc)
queryDesc->estate->es_jit ? &queryDesc->estate->es_jit->instr : NULL, /* jitusage */
#else
NULL,
#endif
#if PG_VERSION_NUM >= 180000
queryDesc->estate->es_parallel_workers_to_launch, /* parallel_workers_to_launch */
queryDesc->estate->es_parallel_workers_launched, /* parallel_workers_launched */
#else
0, /* parallel_workers_to_launch */
0, /* parallel_workers_launched */
#endif
false, /* reset */
PGSM_EXEC); /* kind */
@@ -964,6 +973,8 @@ pgsm_planner_hook(Query *parse, const char *query_string, int cursorOptions, Par
&bufusage, /* bufusage */
&walusage, /* walusage */
NULL, /* jitusage */
0, /* parallel_workers_to_launch */
0, /* parallel_workers_launched */
false, /* reset */
PGSM_PLAN); /* kind */
}
@@ -1189,6 +1200,8 @@ pgsm_ProcessUtility(PlannedStmt *pstmt, const char *queryString,
&bufusage, /* bufusage */
&walusage, /* walusage */
NULL, /* jitusage */
0, /* parallel_workers_to_launch */
0, /* parallel_workers_launched */
false, /* reset */
PGSM_EXEC); /* kind */
@@ -1373,6 +1386,8 @@ pgsm_update_entry(pgsmEntry *entry,
BufferUsage *bufusage,
WalUsage *walusage,
const struct JitInstrumentation *jitusage,
int parallel_workers_to_launch,
int parallel_workers_launched,
bool reset,
pgsmStoreKind kind)
{
@@ -1628,6 +1643,10 @@ pgsm_update_entry(pgsmEntry *entry,
}
}
/* parallel worker counters */
entry->counters.parallel_workers_to_launch += parallel_workers_to_launch;
entry->counters.parallel_workers_launched += parallel_workers_launched;
if (kind == PGSM_STORE)
SpinLockRelease(&entry->mutex);
}
@@ -2018,6 +2037,8 @@ pgsm_store(pgsmEntry *entry)
&bufusage, /* bufusage */
&walusage, /* walusage */
&jitusage, /* jitusage */
entry->counters.parallel_workers_to_launch, /* parallel_workers_to_launch */
entry->counters.parallel_workers_launched, /* parallel_workers_launched */
reset, /* reset */
PGSM_STORE);
@@ -2548,17 +2569,24 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
}
}
if (api_version >= PGSM_V2_1)
if (api_version >= PGSM_V2_3)
{
/* at column number 67 */
values[i++] = Int64GetDatumFast(tmp.parallel_workers_to_launch);
values[i++] = Int64GetDatumFast(tmp.parallel_workers_launched);
}
if (api_version >= PGSM_V2_1)
{
/* at column number 69 */
values[i++] = TimestampTzGetDatum(entry->stats_since);
values[i++] = TimestampTzGetDatum(entry->minmax_stats_since);
}
/* toplevel at column number 69 */
/* toplevel at column number 71 */
values[i++] = BoolGetDatum(toplevel);
/* bucket_done at column number 70 */
/* bucket_done at column number 72 */
values[i++] = BoolGetDatum(pg_atomic_read_u64(&pgsm->current_wbucket) != bucketid);
/* clean up and return the tuplestore */