Skip to content

Commit cd47a4d

Browse files
bmomjianbmomjian
committed
With pg_autovacuum becoming increasingly popular it's important to
have a working stats collector. This test is able to discover the problem that was present in 7.4 Beta 2. Manfred Koizar
1 parent c346ca8 commit cd47a4d

File tree

4 files changed

+140
-2
lines changed

4 files changed

+140
-2
lines changed

‎src/test/regress/expected/stats.out

Lines changed: 79 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,79 @@
1+
--
2+
-- Test Statistics Collector
3+
--
4+
-- Must be run after tenk2 has been created (by create_table),
5+
-- populated (by create_misc) and indexed (by create_index).
6+
--
7+
-- conditio sine qua non
8+
SHOW stats_start_collector; -- must be on
9+
stats_start_collector
10+
-----------------------
11+
on
12+
(1 row)
13+
14+
-- save counters
15+
CREATE TEMP TABLE prevstats AS
16+
SELECT t.seq_scan, t.seq_tup_read, t.idx_scan, t.idx_tup_fetch,
17+
(b.heap_blks_read + b.heap_blks_hit) AS heap_blks,
18+
(b.idx_blks_read + b.idx_blks_hit) AS idx_blks
19+
FROM pg_catalog.pg_stat_user_tables AS t,
20+
pg_catalog.pg_statio_user_tables AS b
21+
WHERE t.relname='tenk2' AND b.relname='tenk2';
22+
-- enable statistics
23+
SET stats_block_level = on;
24+
SET stats_row_level = on;
25+
-- helper function
26+
CREATE FUNCTION sleep(interval) RETURNS integer AS '
27+
DECLARE
28+
endtime timestamp;
29+
BEGIN
30+
endtime := timeofday()::timestamp + $1;
31+
WHILE timeofday()::timestamp < endtime LOOP
32+
END LOOP;
33+
RETURN 0;
34+
END;
35+
' LANGUAGE 'plpgsql';
36+
-- do something
37+
SELECT count(*) FROM tenk2;
38+
count
39+
-------
40+
10000
41+
(1 row)
42+
43+
SELECT count(*) FROM tenk2 WHERE unique1 = 1;
44+
count
45+
-------
46+
1
47+
(1 row)
48+
49+
-- let stats collector catch up
50+
SELECT sleep('0:0:2'::interval);
51+
sleep
52+
-------
53+
0
54+
(1 row)
55+
56+
-- check effects
57+
SELECT st.seq_scan >= pr.seq_scan + 1,
58+
st.seq_tup_read >= pr.seq_tup_read + cl.reltuples,
59+
st.idx_scan >= pr.idx_scan + 1,
60+
st.idx_tup_fetch >= pr.idx_tup_fetch + 1
61+
FROM pg_stat_user_tables AS st, pg_class AS cl, prevstats AS pr
62+
WHERE st.relname='tenk2' AND cl.relname='tenk2';
63+
?column? | ?column? | ?column? | ?column?
64+
----------+----------+----------+----------
65+
t | t | t | t
66+
(1 row)
67+
68+
SELECT st.heap_blks_read + st.heap_blks_hit >= pr.heap_blks + cl.relpages,
69+
st.idx_blks_read + st.idx_blks_hit >= pr.idx_blks + 1
70+
FROM pg_statio_user_tables AS st, pg_class AS cl, prevstats AS pr
71+
WHERE st.relname='tenk2' AND cl.relname='tenk2';
72+
?column? | ?column?
73+
----------+----------
74+
t | t
75+
(1 row)
76+
77+
-- clean up
78+
DROP FUNCTION sleep(interval);
79+
-- End of Stats Test

‎src/test/regress/parallel_schedule

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -74,4 +74,4 @@ test: select_views portals_p2 rules foreign_key cluster
7474
# The sixth group of parallel test
7575
# ----------
7676
# "plpgsql" cannot run concurrently with "rules"
77-
test: limit plpgsql copy2 temp domain rangefuncs prepare without_oid conversion truncate alter_table sequence polymorphism
77+
test: limit plpgsql copy2 temp domain rangefuncs prepare without_oid conversion truncate alter_table sequence polymorphism stats

‎src/test/regress/serial_schedule

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
# $Header: /cvsroot/pgsql/src/test/regress/serial_schedule,v 1.21 2003/08/26 18:32:23 momjian Exp $
1+
# $Header: /cvsroot/pgsql/src/test/regress/serial_schedule,v 1.22 2003/09/13 16:44:48 momjian Exp $
22
# This should probably be in an order similar to parallel_schedule.
33
test: boolean
44
test: char
@@ -93,3 +93,4 @@ test: truncate
9393
test: alter_table
9494
test: sequence
9595
test: polymorphism
96+
test: stats

‎src/test/regress/sql/stats.sql

Lines changed: 58 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,58 @@
1+
--
2+
-- Test Statistics Collector
3+
--
4+
-- Must be run after tenk2 has been created (by create_table),
5+
-- populated (by create_misc) and indexed (by create_index).
6+
--
7+
8+
-- conditio sine qua non
9+
SHOW stats_start_collector; -- must be on
10+
11+
-- save counters
12+
CREATE TEMP TABLE prevstats AS
13+
SELECT t.seq_scan, t.seq_tup_read, t.idx_scan, t.idx_tup_fetch,
14+
(b.heap_blks_read + b.heap_blks_hit) AS heap_blks,
15+
(b.idx_blks_read + b.idx_blks_hit) AS idx_blks
16+
FROM pg_catalog.pg_stat_user_tables AS t,
17+
pg_catalog.pg_statio_user_tables AS b
18+
WHERE t.relname='tenk2' AND b.relname='tenk2';
19+
20+
-- enable statistics
21+
SET stats_block_level = on;
22+
SET stats_row_level = on;
23+
24+
-- helper function
25+
CREATE FUNCTION sleep(interval) RETURNS integer AS '
26+
DECLARE
27+
endtime timestamp;
28+
BEGIN
29+
endtime := timeofday()::timestamp + $1;
30+
WHILE timeofday()::timestamp < endtime LOOP
31+
END LOOP;
32+
RETURN 0;
33+
END;
34+
' LANGUAGE 'plpgsql';
35+
36+
-- do something
37+
SELECT count(*) FROM tenk2;
38+
SELECT count(*) FROM tenk2 WHERE unique1 = 1;
39+
40+
-- let stats collector catch up
41+
SELECT sleep('0:0:2'::interval);
42+
43+
-- check effects
44+
SELECT st.seq_scan >= pr.seq_scan + 1,
45+
st.seq_tup_read >= pr.seq_tup_read + cl.reltuples,
46+
st.idx_scan >= pr.idx_scan + 1,
47+
st.idx_tup_fetch >= pr.idx_tup_fetch + 1
48+
FROM pg_stat_user_tables AS st, pg_class AS cl, prevstats AS pr
49+
WHERE st.relname='tenk2' AND cl.relname='tenk2';
50+
SELECT st.heap_blks_read + st.heap_blks_hit >= pr.heap_blks + cl.relpages,
51+
st.idx_blks_read + st.idx_blks_hit >= pr.idx_blks + 1
52+
FROM pg_statio_user_tables AS st, pg_class AS cl, prevstats AS pr
53+
WHERE st.relname='tenk2' AND cl.relname='tenk2';
54+
55+
-- clean up
56+
DROP FUNCTION sleep(interval);
57+
58+
-- End of Stats Test

0 commit comments

Comments
 (0)
pFad - Phonifier reborn

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


Alternative Proxies:

Alternative Proxy

pFad Proxy

pFad v3 Proxy

pFad v4 Proxy