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Generate pg_stat_get*() functions for tables using macros

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The same code pattern is repeated 17 times for int64 counters (0 for
missing entry) and 5 times for timestamps (NULL for missing entry) on
table entries.  This code is switched to use a macro for the basic code
instead, shaving a few hundred lines of originally-duplicated code.  The
function names remain the same, but some fields of PgStat_StatTabEntry
have to be renamed to cope with the new style.

Author: Bertrand Drouvot
Reviewed-by: Nathan Bossart
Discussion: https:/postgr.es/m/20221204173207.GA2669116@nathanxps13
pull/112/head
Michael Paquier 3 years ago
parent 941aa6a626
commit 83a1a1b566
5 changed files with 139 additions and 396 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 2
      src/backend/access/heap/README.HOT
  2. 6
      src/backend/postmaster/autovacuum.c
  3. 50
      src/backend/utils/activity/pgstat_relation.c
  4. 457
      src/backend/utils/adt/pgstatfuncs.c
  5. 20
      src/include/pgstat.h

2
src/backend/access/heap/README.HOT
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@ -271,7 +271,7 @@ physical tuple by eliminating an intermediate heap-only tuple or
replacing a physical root tuple by a redirect pointer, a decrement in
the table's number of dead tuples is reported to pgstats, which may
postpone autovacuuming. Note that we do not count replacing a root tuple
by a DEAD line pointer as decrementing n_dead_tuples; we still want
by a DEAD line pointer as decrementing dead_tuples; we still want
autovacuum to run to clean up the index entries and DEAD item.
This area probably needs further work ...

6
src/backend/postmaster/autovacuum.c
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@ -3081,9 +3081,9 @@ relation_needs_vacanalyze(Oid relid,
if (PointerIsValid(tabentry) && AutoVacuumingActive())
{
reltuples = classForm->reltuples;
vactuples = tabentry->n_dead_tuples;
instuples = tabentry->inserts_since_vacuum;
anltuples = tabentry->changes_since_analyze;
vactuples = tabentry->dead_tuples;
instuples = tabentry->ins_since_vacuum;
anltuples = tabentry->mod_since_analyze;
/* If the table hasn't yet been vacuumed, take reltuples as zero */
if (reltuples < 0)

50
src/backend/utils/activity/pgstat_relation.c
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@ -231,8 +231,8 @@ pgstat_report_vacuum(Oid tableoid, bool shared,
shtabentry = (PgStatShared_Relation *) entry_ref->shared_stats;
tabentry = &shtabentry->stats;
tabentry->n_live_tuples = livetuples;
tabentry->n_dead_tuples = deadtuples;
tabentry->live_tuples = livetuples;
tabentry->dead_tuples = deadtuples;
/*
* It is quite possible that a non-aggressive VACUUM ended up skipping
@ -244,16 +244,16 @@ pgstat_report_vacuum(Oid tableoid, bool shared,
* autovacuum. An anti-wraparound autovacuum will catch any persistent
* stragglers.
*/
tabentry->inserts_since_vacuum = 0;
tabentry->ins_since_vacuum = 0;
if (IsAutoVacuumWorkerProcess())
{
tabentry->autovac_vacuum_timestamp = ts;
tabentry->autovac_vacuum_count++;
tabentry->last_autovacuum_time = ts;
tabentry->autovacuum_count++;
}
else
{
tabentry->vacuum_timestamp = ts;
tabentry->last_vacuum_time = ts;
tabentry->vacuum_count++;
}
@ -264,7 +264,7 @@ pgstat_report_vacuum(Oid tableoid, bool shared,
* Report that the table was just analyzed.
*
* Caller must provide new live- and dead-tuples estimates, as well as a
* flag indicating whether to reset the changes_since_analyze counter.
* flag indicating whether to reset the mod_since_analyze counter.
*/
void
pgstat_report_analyze(Relation rel,
@ -318,25 +318,25 @@ pgstat_report_analyze(Relation rel,
shtabentry = (PgStatShared_Relation *) entry_ref->shared_stats;
tabentry = &shtabentry->stats;
tabentry->n_live_tuples = livetuples;
tabentry->n_dead_tuples = deadtuples;
tabentry->live_tuples = livetuples;
tabentry->dead_tuples = deadtuples;
/*
* If commanded, reset changes_since_analyze to zero. This forgets any
* If commanded, reset mod_since_analyze to zero. This forgets any
* changes that were committed while the ANALYZE was in progress, but we
* have no good way to estimate how many of those there were.
*/
if (resetcounter)
tabentry->changes_since_analyze = 0;
tabentry->mod_since_analyze = 0;
if (IsAutoVacuumWorkerProcess())
{
tabentry->autovac_analyze_timestamp = GetCurrentTimestamp();
tabentry->autovac_analyze_count++;
tabentry->last_autoanalyze_time = GetCurrentTimestamp();
tabentry->autoanalyze_count++;
}
else
{
tabentry->analyze_timestamp = GetCurrentTimestamp();
tabentry->last_analyze_time = GetCurrentTimestamp();
tabentry->analyze_count++;
}
@ -798,22 +798,22 @@ pgstat_relation_flush_cb(PgStat_EntryRef *entry_ref, bool nowait)
*/
if (lstats->t_counts.t_truncdropped)
{
tabentry->n_live_tuples = 0;
tabentry->n_dead_tuples = 0;
tabentry->inserts_since_vacuum = 0;
tabentry->live_tuples = 0;
tabentry->dead_tuples = 0;
tabentry->ins_since_vacuum = 0;
}
tabentry->n_live_tuples += lstats->t_counts.t_delta_live_tuples;
tabentry->n_dead_tuples += lstats->t_counts.t_delta_dead_tuples;
tabentry->changes_since_analyze += lstats->t_counts.t_changed_tuples;
tabentry->inserts_since_vacuum += lstats->t_counts.t_tuples_inserted;
tabentry->live_tuples += lstats->t_counts.t_delta_live_tuples;
tabentry->dead_tuples += lstats->t_counts.t_delta_dead_tuples;
tabentry->mod_since_analyze += lstats->t_counts.t_changed_tuples;
tabentry->ins_since_vacuum += lstats->t_counts.t_tuples_inserted;
tabentry->blocks_fetched += lstats->t_counts.t_blocks_fetched;
tabentry->blocks_hit += lstats->t_counts.t_blocks_hit;
/* Clamp n_live_tuples in case of negative delta_live_tuples */
tabentry->n_live_tuples = Max(tabentry->n_live_tuples, 0);
/* Likewise for n_dead_tuples */
tabentry->n_dead_tuples = Max(tabentry->n_dead_tuples, 0);
/* Clamp live_tuples in case of negative delta_live_tuples */
tabentry->live_tuples = Max(tabentry->live_tuples, 0);
/* Likewise for dead_tuples */
tabentry->dead_tuples = Max(tabentry->dead_tuples, 0);
pgstat_unlock_entry(entry_ref);

457
src/backend/utils/adt/pgstatfuncs.c
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@ -36,363 +36,106 @@
#define HAS_PGSTAT_PERMISSIONS(role) (has_privs_of_role(GetUserId(), ROLE_PG_READ_ALL_STATS) || has_privs_of_role(GetUserId(), role))
Datum
pg_stat_get_numscans(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->numscans);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_lastscan(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->lastscan;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_tuples_returned(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_returned);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_inserted);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_updated(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_updated);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_deleted);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_tuples_hot_updated(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->tuples_hot_updated);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_live_tuples(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->n_live_tuples);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_dead_tuples(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->n_dead_tuples);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_mod_since_analyze(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->changes_since_analyze);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_ins_since_vacuum(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->inserts_since_vacuum);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->blocks_fetched);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_blocks_hit(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->blocks_hit);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->vacuum_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->autovac_vacuum_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->analyze_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = tabentry->autovac_analyze_timestamp;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_vacuum_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->vacuum_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_autovacuum_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->autovac_vacuum_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_analyze_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->analyze_count);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_autoanalyze_count(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->autovac_analyze_count);
PG_RETURN_INT64(result);
}
#define PG_STAT_GET_RELENTRY_INT64(stat) \
Datum \
CppConcat(pg_stat_get_,stat)(PG_FUNCTION_ARGS) \
{ \
Oid relid = PG_GETARG_OID(0); \
int64 result; \
PgStat_StatTabEntry *tabentry; \
\
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL) \
result = 0; \
else \
result = (int64) (tabentry->stat); \
\
PG_RETURN_INT64(result); \
} \
/* pg_stat_get_analyze_count */
PG_STAT_GET_RELENTRY_INT64(analyze_count);
/* pg_stat_get_autoanalyze_count */
PG_STAT_GET_RELENTRY_INT64(autoanalyze_count);
/* pg_stat_get_autovacuum_count */
PG_STAT_GET_RELENTRY_INT64(autovacuum_count);
/* pg_stat_get_blocks_fetched */
PG_STAT_GET_RELENTRY_INT64(blocks_fetched);
/* pg_stat_get_blocks_hit */
PG_STAT_GET_RELENTRY_INT64(blocks_hit);
/* pg_stat_get_dead_tuples */
PG_STAT_GET_RELENTRY_INT64(dead_tuples);
/* pg_stat_get_ins_since_vacuum */
PG_STAT_GET_RELENTRY_INT64(ins_since_vacuum);
/* pg_stat_get_live_tuples */
PG_STAT_GET_RELENTRY_INT64(live_tuples);
/* pg_stat_get_mods_since_analyze */
PG_STAT_GET_RELENTRY_INT64(mod_since_analyze);
/* pg_stat_get_numscans */
PG_STAT_GET_RELENTRY_INT64(numscans);
/* pg_stat_get_tuples_deleted */
PG_STAT_GET_RELENTRY_INT64(tuples_deleted);
/* pg_stat_get_tuples_fetched */
PG_STAT_GET_RELENTRY_INT64(tuples_fetched);
/* pg_stat_get_tuples_hot_updated */
PG_STAT_GET_RELENTRY_INT64(tuples_hot_updated);
/* pg_stat_get_tuples_inserted */
PG_STAT_GET_RELENTRY_INT64(tuples_inserted);
/* pg_stat_get_tuples_returned */
PG_STAT_GET_RELENTRY_INT64(tuples_returned);
/* pg_stat_get_tuples_updated */
PG_STAT_GET_RELENTRY_INT64(tuples_updated);
/* pg_stat_get_vacuum_count */
PG_STAT_GET_RELENTRY_INT64(vacuum_count);
#define PG_STAT_GET_RELENTRY_TIMESTAMPTZ(stat) \
Datum \
CppConcat(pg_stat_get_,stat)(PG_FUNCTION_ARGS) \
{ \
Oid relid = PG_GETARG_OID(0); \
TimestampTz result; \
PgStat_StatTabEntry *tabentry; \
\
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL) \
result = 0; \
else \
result = tabentry->stat; \
\
if (result == 0) \
PG_RETURN_NULL(); \
else \
PG_RETURN_TIMESTAMPTZ(result); \
} \
/* pg_stat_get_last_analyze_time */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_analyze_time);
/* pg_stat_get_last_autoanalyze_time */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_autoanalyze_time);
/* pg_stat_get_last_autovacuum_time */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_autovacuum_time);
/* pg_stat_get_last_vacuum_time */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_vacuum_time);
/* pg_stat_get_lastscan */
PG_STAT_GET_RELENTRY_TIMESTAMPTZ(lastscan);
Datum
pg_stat_get_function_calls(PG_FUNCTION_ARGS)

20
src/include/pgstat.h
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@ -364,22 +364,22 @@ typedef struct PgStat_StatTabEntry
PgStat_Counter tuples_deleted;
PgStat_Counter tuples_hot_updated;
PgStat_Counter n_live_tuples;
PgStat_Counter n_dead_tuples;
PgStat_Counter changes_since_analyze;
PgStat_Counter inserts_since_vacuum;
PgStat_Counter live_tuples;
PgStat_Counter dead_tuples;
PgStat_Counter mod_since_analyze;
PgStat_Counter ins_since_vacuum;
PgStat_Counter blocks_fetched;
PgStat_Counter blocks_hit;
TimestampTz vacuum_timestamp; /* user initiated vacuum */
TimestampTz last_vacuum_time; /* user initiated vacuum */
PgStat_Counter vacuum_count;
TimestampTz autovac_vacuum_timestamp; /* autovacuum initiated */
PgStat_Counter autovac_vacuum_count;
TimestampTz analyze_timestamp; /* user initiated */
TimestampTz last_autovacuum_time; /* autovacuum initiated */
PgStat_Counter autovacuum_count;
TimestampTz last_analyze_time; /* user initiated */
PgStat_Counter analyze_count;
TimestampTz autovac_analyze_timestamp; /* autovacuum initiated */
PgStat_Counter autovac_analyze_count;
TimestampTz last_autoanalyze_time; /* autovacuum initiated */
PgStat_Counter autoanalyze_count;
} PgStat_StatTabEntry;
typedef struct PgStat_WalStats

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