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pgstat: introduce pgstat_relation_should_count(). 

A later commit will make the check more complicated than the
current (rel)->pgstat_info != NULL. It also just seems nicer to have a central
copy of the logic, even while still simple.

Author: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20220303021600.hs34ghqcw6zcokdh@alap3.anarazel.de
This commit is contained in:
Andres Freund 2022-03-20 19:12:09 -07:00
parent 2d655a08d5
commit 8363102009
3 changed files with 28 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/backend/catalog/index.c
View File

@ -1743,7 +1743,7 @@ index_concurrently_swap(Oid newIndexId, Oid oldIndexId, const char *oldName)
tabentry = pgstat_fetch_stat_tabentry(oldIndexId);
if (tabentry)
{
if (newClassRel->pgstat_info)
if (pgstat_relation_should_count(newClassRel))
{
newClassRel->pgstat_info->t_counts.t_numscans = tabentry->numscans;
newClassRel->pgstat_info->t_counts.t_tuples_returned = tabentry->tuples_returned;

36
src/backend/postmaster/pgstat.c
View File

@ -1709,7 +1709,7 @@ pgstat_report_analyze(Relation rel,
*
* Waste no time on partitioned tables, though.
*/
if (rel->pgstat_info != NULL &&
if (pgstat_relation_should_count(rel) &&
rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
{
PgStat_TableXactStatus *trans;
@ -2359,13 +2359,12 @@ add_tabstat_xact_level(PgStat_TableStatus *pgstat_info, int nest_level)
void
pgstat_count_heap_insert(Relation rel, PgStat_Counter n)
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
if (pgstat_relation_should_count(rel))
{
/* We have to log the effect at the proper transactional level */
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
int nest_level = GetCurrentTransactionNestLevel();
/* We have to log the effect at the proper transactional level */
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
@ -2380,13 +2379,12 @@ pgstat_count_heap_insert(Relation rel, PgStat_Counter n)
void
pgstat_count_heap_update(Relation rel, bool hot)
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
if (pgstat_relation_should_count(rel))
{
/* We have to log the effect at the proper transactional level */
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
int nest_level = GetCurrentTransactionNestLevel();
/* We have to log the effect at the proper transactional level */
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
@ -2405,13 +2403,12 @@ pgstat_count_heap_update(Relation rel, bool hot)
void
pgstat_count_heap_delete(Relation rel)
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
if (pgstat_relation_should_count(rel))
{
/* We have to log the effect at the proper transactional level */
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
int nest_level = GetCurrentTransactionNestLevel();
/* We have to log the effect at the proper transactional level */
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
@ -2463,13 +2460,12 @@ pgstat_truncdrop_restore_counters(PgStat_TableXactStatus *trans)
void
pgstat_count_truncate(Relation rel)
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
if (pgstat_relation_should_count(rel))
{
/* We have to log the effect at the proper transactional level */
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
int nest_level = GetCurrentTransactionNestLevel();
/* We have to log the effect at the proper transactional level */
if (pgstat_info->trans == NULL ||
pgstat_info->trans->nest_level != nest_level)
add_tabstat_xact_level(pgstat_info, nest_level);
@ -2492,10 +2488,12 @@ pgstat_count_truncate(Relation rel)
void
pgstat_update_heap_dead_tuples(Relation rel, int delta)
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_relation_should_count(rel))
{
PgStat_TableStatus *pgstat_info = rel->pgstat_info;
if (pgstat_info != NULL)
pgstat_info->t_counts.t_delta_dead_tuples -= delta;
}
}
/*

17
src/include/pgstat.h
View File

@ -1104,41 +1104,44 @@ extern PgStat_BackendFunctionEntry *find_funcstat_entry(Oid func_id);
extern void pgstat_initstats(Relation rel);
#define pgstat_relation_should_count(rel) \
(likely((rel)->pgstat_info != NULL))
/* nontransactional event counts are simple enough to inline */
#define pgstat_count_heap_scan(rel) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_numscans++; \
} while (0)
#define pgstat_count_heap_getnext(rel) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_tuples_returned++; \
} while (0)
#define pgstat_count_heap_fetch(rel) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_tuples_fetched++; \
} while (0)
#define pgstat_count_index_scan(rel) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_numscans++; \
} while (0)
#define pgstat_count_index_tuples(rel, n) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_tuples_returned += (n); \
} while (0)
#define pgstat_count_buffer_read(rel) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_blocks_fetched++; \
} while (0)
#define pgstat_count_buffer_hit(rel) \
do { \
if ((rel)->pgstat_info != NULL) \
if (pgstat_relation_should_count(rel)) \
(rel)->pgstat_info->t_counts.t_blocks_hit++; \
} while (0)
#define pgstat_count_buffer_read_time(n) \