diff options
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/regress/expected/rules.out | 9 | ||||
| -rw-r--r-- | src/test/regress/expected/stats.out | 202 | ||||
| -rw-r--r-- | src/test/regress/sql/stats.sql | 86 |
3 files changed, 297 insertions, 0 deletions
diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out index 9dd137415e8..bfcd8ac9a06 100644 --- a/src/test/regress/expected/rules.out +++ b/src/test/regress/expected/rules.out @@ -1763,6 +1763,7 @@ pg_stat_all_indexes| SELECT c.oid AS relid, c.relname, i.relname AS indexrelname, pg_stat_get_numscans(i.oid) AS idx_scan, + pg_stat_get_lastscan(i.oid) AS last_idx_scan, pg_stat_get_tuples_returned(i.oid) AS idx_tup_read, pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch FROM (((pg_class c @@ -1774,8 +1775,10 @@ pg_stat_all_tables| SELECT c.oid AS relid, n.nspname AS schemaname, c.relname, pg_stat_get_numscans(c.oid) AS seq_scan, + pg_stat_get_lastscan(c.oid) AS last_seq_scan, pg_stat_get_tuples_returned(c.oid) AS seq_tup_read, (sum(pg_stat_get_numscans(i.indexrelid)))::bigint AS idx_scan, + max(pg_stat_get_lastscan(i.indexrelid)) AS last_idx_scan, ((sum(pg_stat_get_tuples_fetched(i.indexrelid)))::bigint + pg_stat_get_tuples_fetched(c.oid)) AS idx_tup_fetch, pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins, pg_stat_get_tuples_updated(c.oid) AS n_tup_upd, @@ -2107,6 +2110,7 @@ pg_stat_sys_indexes| SELECT pg_stat_all_indexes.relid, pg_stat_all_indexes.relname, pg_stat_all_indexes.indexrelname, pg_stat_all_indexes.idx_scan, + pg_stat_all_indexes.last_idx_scan, pg_stat_all_indexes.idx_tup_read, pg_stat_all_indexes.idx_tup_fetch FROM pg_stat_all_indexes @@ -2115,8 +2119,10 @@ pg_stat_sys_tables| SELECT pg_stat_all_tables.relid, pg_stat_all_tables.schemaname, pg_stat_all_tables.relname, pg_stat_all_tables.seq_scan, + pg_stat_all_tables.last_seq_scan, pg_stat_all_tables.seq_tup_read, pg_stat_all_tables.idx_scan, + pg_stat_all_tables.last_idx_scan, pg_stat_all_tables.idx_tup_fetch, pg_stat_all_tables.n_tup_ins, pg_stat_all_tables.n_tup_upd, @@ -2151,6 +2157,7 @@ pg_stat_user_indexes| SELECT pg_stat_all_indexes.relid, pg_stat_all_indexes.relname, pg_stat_all_indexes.indexrelname, pg_stat_all_indexes.idx_scan, + pg_stat_all_indexes.last_idx_scan, pg_stat_all_indexes.idx_tup_read, pg_stat_all_indexes.idx_tup_fetch FROM pg_stat_all_indexes @@ -2159,8 +2166,10 @@ pg_stat_user_tables| SELECT pg_stat_all_tables.relid, pg_stat_all_tables.schemaname, pg_stat_all_tables.relname, pg_stat_all_tables.seq_scan, + pg_stat_all_tables.last_seq_scan, pg_stat_all_tables.seq_tup_read, pg_stat_all_tables.idx_scan, + pg_stat_all_tables.last_idx_scan, pg_stat_all_tables.idx_tup_fetch, pg_stat_all_tables.n_tup_ins, pg_stat_all_tables.n_tup_upd, diff --git a/src/test/regress/expected/stats.out b/src/test/regress/expected/stats.out index f701da20697..257a6a9da9a 100644 --- a/src/test/regress/expected/stats.out +++ b/src/test/regress/expected/stats.out @@ -557,6 +557,208 @@ SELECT pg_stat_get_live_tuples(:drop_stats_test_subxact_oid); DROP TABLE trunc_stats_test, trunc_stats_test1, trunc_stats_test2, trunc_stats_test3, trunc_stats_test4; DROP TABLE prevstats; ----- +-- Test that last_seq_scan, last_idx_scan are correctly maintained +-- +-- Perform test using a temporary table. That way autovacuum etc won't +-- interfere. To be able to check that timestamps increase, we sleep for 100ms +-- between tests, assuming that there aren't systems with a coarser timestamp +-- granularity. +----- +BEGIN; +CREATE TEMPORARY TABLE test_last_scan(idx_col int primary key, noidx_col int); +INSERT INTO test_last_scan(idx_col, noidx_col) VALUES(1, 1); +SELECT pg_stat_force_next_flush(); + pg_stat_force_next_flush +-------------------------- + +(1 row) + +COMMIT; +SELECT pg_stat_reset_single_table_counters('test_last_scan'::regclass); + pg_stat_reset_single_table_counters +------------------------------------- + +(1 row) + +SELECT seq_scan, idx_scan FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + seq_scan | idx_scan +----------+---------- + 0 | 0 +(1 row) + +-- ensure we start out with exactly one index and sequential scan +BEGIN; +SET LOCAL enable_seqscan TO on; +SET LOCAL enable_indexscan TO on; +SET LOCAL enable_bitmapscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; + QUERY PLAN +---------------------------------- + Aggregate + -> Seq Scan on test_last_scan + Filter: (noidx_col = 1) +(3 rows) + +SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; + count +------- + 1 +(1 row) + +SET LOCAL enable_seqscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1; + QUERY PLAN +-------------------------------------------------------------- + Aggregate + -> Index Scan using test_last_scan_pkey on test_last_scan + Index Cond: (idx_col = 1) +(3 rows) + +SELECT count(*) FROM test_last_scan WHERE idx_col = 1; + count +------- + 1 +(1 row) + +SELECT pg_stat_force_next_flush(); + pg_stat_force_next_flush +-------------------------- + +(1 row) + +COMMIT; +-- fetch timestamps from before the next test +SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset +SELECT pg_sleep(0.1); -- assume a minimum timestamp granularity of 100ms + pg_sleep +---------- + +(1 row) + +-- cause one sequential scan +BEGIN; +SET LOCAL enable_seqscan TO on; +SET LOCAL enable_indexscan TO off; +SET LOCAL enable_bitmapscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; + QUERY PLAN +---------------------------------- + Aggregate + -> Seq Scan on test_last_scan + Filter: (noidx_col = 1) +(3 rows) + +SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; + count +------- + 1 +(1 row) + +SELECT pg_stat_force_next_flush(); + pg_stat_force_next_flush +-------------------------- + +(1 row) + +COMMIT; +-- check that just sequential scan stats were incremented +SELECT seq_scan, :'test_last_seq' < last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' = last_idx_scan AS idx_ok +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + seq_scan | seq_ok | idx_scan | idx_ok +----------+--------+----------+-------- + 2 | t | 1 | t +(1 row) + +-- fetch timestamps from before the next test +SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset +SELECT pg_sleep(0.1); + pg_sleep +---------- + +(1 row) + +-- cause one index scan +BEGIN; +SET LOCAL enable_seqscan TO off; +SET LOCAL enable_indexscan TO on; +SET LOCAL enable_bitmapscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1; + QUERY PLAN +-------------------------------------------------------------- + Aggregate + -> Index Scan using test_last_scan_pkey on test_last_scan + Index Cond: (idx_col = 1) +(3 rows) + +SELECT count(*) FROM test_last_scan WHERE idx_col = 1; + count +------- + 1 +(1 row) + +SELECT pg_stat_force_next_flush(); + pg_stat_force_next_flush +-------------------------- + +(1 row) + +COMMIT; +-- check that just index scan stats were incremented +SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + seq_scan | seq_ok | idx_scan | idx_ok +----------+--------+----------+-------- + 2 | t | 2 | t +(1 row) + +-- fetch timestamps from before the next test +SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset +SELECT pg_sleep(0.1); + pg_sleep +---------- + +(1 row) + +-- cause one bitmap index scan +BEGIN; +SET LOCAL enable_seqscan TO off; +SET LOCAL enable_indexscan TO off; +SET LOCAL enable_bitmapscan TO on; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1; + QUERY PLAN +------------------------------------------------------ + Aggregate + -> Bitmap Heap Scan on test_last_scan + Recheck Cond: (idx_col = 1) + -> Bitmap Index Scan on test_last_scan_pkey + Index Cond: (idx_col = 1) +(5 rows) + +SELECT count(*) FROM test_last_scan WHERE idx_col = 1; + count +------- + 1 +(1 row) + +SELECT pg_stat_force_next_flush(); + pg_stat_force_next_flush +-------------------------- + +(1 row) + +COMMIT; +-- check that just index scan stats were incremented +SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + seq_scan | seq_ok | idx_scan | idx_ok +----------+--------+----------+-------- + 2 | t | 3 | t +(1 row) + +----- -- Test that various stats views are being properly populated ----- -- Test that sessions is incremented when a new session is started in pg_stat_database diff --git a/src/test/regress/sql/stats.sql b/src/test/regress/sql/stats.sql index eb081f65a42..f6270f7badb 100644 --- a/src/test/regress/sql/stats.sql +++ b/src/test/regress/sql/stats.sql @@ -291,6 +291,92 @@ DROP TABLE prevstats; ----- +-- Test that last_seq_scan, last_idx_scan are correctly maintained +-- +-- Perform test using a temporary table. That way autovacuum etc won't +-- interfere. To be able to check that timestamps increase, we sleep for 100ms +-- between tests, assuming that there aren't systems with a coarser timestamp +-- granularity. +----- + +BEGIN; +CREATE TEMPORARY TABLE test_last_scan(idx_col int primary key, noidx_col int); +INSERT INTO test_last_scan(idx_col, noidx_col) VALUES(1, 1); +SELECT pg_stat_force_next_flush(); +COMMIT; + +SELECT pg_stat_reset_single_table_counters('test_last_scan'::regclass); +SELECT seq_scan, idx_scan FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + +-- ensure we start out with exactly one index and sequential scan +BEGIN; +SET LOCAL enable_seqscan TO on; +SET LOCAL enable_indexscan TO on; +SET LOCAL enable_bitmapscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; +SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; +SET LOCAL enable_seqscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1; +SELECT count(*) FROM test_last_scan WHERE idx_col = 1; +SELECT pg_stat_force_next_flush(); +COMMIT; + +-- fetch timestamps from before the next test +SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset +SELECT pg_sleep(0.1); -- assume a minimum timestamp granularity of 100ms + +-- cause one sequential scan +BEGIN; +SET LOCAL enable_seqscan TO on; +SET LOCAL enable_indexscan TO off; +SET LOCAL enable_bitmapscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; +SELECT count(*) FROM test_last_scan WHERE noidx_col = 1; +SELECT pg_stat_force_next_flush(); +COMMIT; +-- check that just sequential scan stats were incremented +SELECT seq_scan, :'test_last_seq' < last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' = last_idx_scan AS idx_ok +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + +-- fetch timestamps from before the next test +SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset +SELECT pg_sleep(0.1); + +-- cause one index scan +BEGIN; +SET LOCAL enable_seqscan TO off; +SET LOCAL enable_indexscan TO on; +SET LOCAL enable_bitmapscan TO off; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1; +SELECT count(*) FROM test_last_scan WHERE idx_col = 1; +SELECT pg_stat_force_next_flush(); +COMMIT; +-- check that just index scan stats were incremented +SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + +-- fetch timestamps from before the next test +SELECT last_seq_scan AS test_last_seq, last_idx_scan AS test_last_idx +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass \gset +SELECT pg_sleep(0.1); + +-- cause one bitmap index scan +BEGIN; +SET LOCAL enable_seqscan TO off; +SET LOCAL enable_indexscan TO off; +SET LOCAL enable_bitmapscan TO on; +EXPLAIN (COSTS off) SELECT count(*) FROM test_last_scan WHERE idx_col = 1; +SELECT count(*) FROM test_last_scan WHERE idx_col = 1; +SELECT pg_stat_force_next_flush(); +COMMIT; +-- check that just index scan stats were incremented +SELECT seq_scan, :'test_last_seq' = last_seq_scan AS seq_ok, idx_scan, :'test_last_idx' < last_idx_scan AS idx_ok +FROM pg_stat_all_tables WHERE relid = 'test_last_scan'::regclass; + + +----- -- Test that various stats views are being properly populated ----- |