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PG-1907 Add wal_buffers_full

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Add wal_buffers_full value, same as was introduced in PGSS in commit ce5bcc4.
This commit is contained in:
Artem Gavrilov
2025-09-17 20:27:45 +02:00
committed by Artem Gavrilov
parent 9dad93b770
commit 9496937c9f
7 changed files with 253 additions and 13 deletions
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42
pg_stat_monitor.c
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@@ -37,7 +37,8 @@ typedef enum pgsmVersion
{
PGSM_V1_0 = 0,
PGSM_V2_0,
PGSM_V2_1
PGSM_V2_1,
PGSM_V2_3,
} pgsmVersion;
PG_MODULE_MAGIC;
@@ -48,7 +49,8 @@ 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 PG_STAT_MONITOR_COLS_V2_1 /* maximum of above */
#define PG_STAT_MONITOR_COLS_V2_3 71
#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"
@@ -150,6 +152,7 @@ PG_FUNCTION_INFO_V1(pg_stat_monitor_reset);
PG_FUNCTION_INFO_V1(pg_stat_monitor_1_0);
PG_FUNCTION_INFO_V1(pg_stat_monitor_2_0);
PG_FUNCTION_INFO_V1(pg_stat_monitor_2_1);
PG_FUNCTION_INFO_V1(pg_stat_monitor_2_3);
PG_FUNCTION_INFO_V1(pg_stat_monitor);
PG_FUNCTION_INFO_V1(get_histogram_timings);
PG_FUNCTION_INFO_V1(pg_stat_monitor_hook_stats);
@@ -1584,6 +1587,9 @@ pgsm_update_entry(pgsmEntry *entry,
entry->counters.walusage.wal_records += walusage->wal_records;
entry->counters.walusage.wal_fpi += walusage->wal_fpi;
entry->counters.walusage.wal_bytes += walusage->wal_bytes;
#if PG_VERSION_NUM >= 180000
entry->counters.walusage.wal_buffers_full += walusage->wal_buffers_full;
#endif
}
if (jitusage)
{
@@ -1877,6 +1883,10 @@ pgsm_store(pgsmEntry *entry)
walusage.wal_fpi = entry->counters.walusage.wal_fpi;
walusage.wal_bytes = entry->counters.walusage.wal_bytes;
#if PG_VERSION_NUM >= 180000
walusage.wal_buffers_full = entry->counters.walusage.wal_buffers_full;
#endif
/* jit */
jitusage.created_functions = entry->counters.jitinfo.jit_functions;
memcpy(&jitusage.generation_counter, &entry->counters.jitinfo.instr_generation_counter, sizeof(instr_time));
@@ -2063,6 +2073,13 @@ pg_stat_monitor_2_1(PG_FUNCTION_ARGS)
return (Datum) 0;
}
Datum
pg_stat_monitor_2_3(PG_FUNCTION_ARGS)
{
pg_stat_monitor_internal(fcinfo, PGSM_V2_3, true);
return (Datum) 0;
}
/*
* Legacy entry point for pg_stat_monitor() API versions 1.0
*/
@@ -2116,6 +2133,9 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
case PGSM_V2_1:
expected_columns = PG_STAT_MONITOR_COLS_V2_1;
break;
case PGSM_V2_3:
expected_columns = PG_STAT_MONITOR_COLS_V2_3;
break;
default:
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@@ -2499,13 +2519,19 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
/* wal_bytes at column number 54 */
values[i++] = wal_bytes;
/* application_name at column number 55 */
if (api_version >= PGSM_V2_3)
{
/* wal_buffers_full at column number 55 */
values[i++] = Int64GetDatumFast(tmp.walusage.wal_buffers_full);
}
/* application_name at column number 56 */
if (strlen(tmp.info.comments) > 0)
values[i++] = CStringGetTextDatum(tmp.info.comments);
else
nulls[i++] = true;
/* blocks are from column number 56 - 63 */
/* blocks are from column number 57 - 64 */
values[i++] = Int64GetDatumFast(tmp.jitinfo.jit_functions);
values[i++] = Float8GetDatumFast(tmp.jitinfo.jit_generation_time);
values[i++] = Int64GetDatumFast(tmp.jitinfo.jit_inlining_count);
@@ -2516,7 +2542,7 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
values[i++] = Float8GetDatumFast(tmp.jitinfo.jit_emission_time);
if (api_version >= PGSM_V2_1)
{
/* at column number 64 */
/* at column number 65 */
values[i++] = Int64GetDatumFast(tmp.jitinfo.jit_deform_count);
values[i++] = Float8GetDatumFast(tmp.jitinfo.jit_deform_time);
}
@@ -2524,15 +2550,15 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
if (api_version >= PGSM_V2_1)
{
/* at column number 66 */
/* at column number 67 */
values[i++] = TimestampTzGetDatum(entry->stats_since);
values[i++] = TimestampTzGetDatum(entry->minmax_stats_since);
}
/* toplevel at column number 68 */
/* toplevel at column number 69 */
values[i++] = BoolGetDatum(toplevel);
/* bucket_done at column number 69 */
/* bucket_done at column number 70 */
values[i++] = BoolGetDatum(pg_atomic_read_u64(&pgsm->current_wbucket) != bucketid);
/* clean up and return the tuplestore */