Обсуждение: autovacuum not honoring pg_autovacuum in 8.3.5?
Hello,
I found this today. Note, auto vacuum has been disabled for this
relation for a very, very long time. At the very end you will see that
this relation has been autovacuumed previously as well. We have a manual
cron to vacuum this table every hour so I am unsure why autovacuum is
doing what it is doing.
app=# select * from pg_autovacuum where vacrelid = '21474846';
-[ RECORD 1 ]----+---------
vacrelid | 21474846
enabled | f
vac_base_thresh | 0
vac_scale_factor | 0
anl_base_thresh | 0
anl_scale_factor | 0
vac_cost_delay | 0
vac_cost_limit | 0
freeze_min_age | 0
freeze_max_age | 0
-[ RECORD 1 ]-+--------------------------------------------
datid | 41824
datname | bar
procpid | 23019
usesysid | 10
usename | postgres
current_query | autovacuum: VACUUM ANALYZE public.foo
waiting | t
xact_start | 2009-02-13 15:02:04.938608-05
query_start | 2009-02-13 15:02:04.938608-05
backend_start | 2009-02-13 15:01:29.001314-05
client_addr |
client_port |
-[ RECORD
1 ]--+---------------------------------------------------------------------
relname | foo
relnamespace | 2200
reltype | 21474848
relowner | 16388
relam | 0
relfilenode | 83717977
reltablespace | 53723308
relpages | 200675
reltuples | 1.47796e+06
reltoastrelid | 83717991
reltoastidxid | 0
relhasindex | t
relisshared | f
relkind | r
relnatts | 13
relchecks | 3
reltriggers | 7
relukeys | 0
relfkeys | 0
relrefs | 0
relhasoids | f
relhaspkey | t
relhasrules | f
relhassubclass | t
relfrozenxid | 1921217148
relacl |
{kangaroo=arwdxt/kangaroo,postgres=arwdxt/kangaroo,gecko=r/kangaroo}
reloptions |
app=# select * from pg_stat_user_tables where relname = 'freq_mesg';
-[ RECORD 1 ]----+------------------------------
relid | 21474846
schemaname | public
relname | foo
seq_scan | 1782558
seq_tup_read | 466560347
idx_scan | 645524149
idx_tup_fetch | 954031368
n_tup_ins | 772875
n_tup_upd | 3594780
n_tup_del | 486793
n_tup_hot_upd | 957822
n_live_tup | 1477979
n_dead_tup | 152
last_vacuum | 2009-02-13 15:00:54.190851-05
last_autovacuum | 2009-02-13 14:29:05.220037-05
last_analyze | 2009-02-13 15:00:54.190851-05
last_autoanalyze | 2009-02-13 14:29:05.220037-05
--
PostgreSQL - XMPP: jdrake@jabber.postgresql.org Consulting, Development, Support, Training 503-667-4564 -
http://www.commandprompt.com/ The PostgreSQL Company, serving since 1997
On Fri, Feb 13, 2009 at 3:21 PM, Joshua D. Drake <jd@commandprompt.com> wrote: > Hello, > > I found this today. Note, auto vacuum has been disabled for this > relation for a very, very long time. At the very end you will see that > this relation has been autovacuumed previously as well. We have a manual > cron to vacuum this table every hour so I am unsure why autovacuum is > doing what it is doing. > > app=# select * from pg_autovacuum where vacrelid = '21474846'; > -[ RECORD 1 ]----+--------- > vacrelid | 21474846 > enabled | f > vac_base_thresh | 0 > vac_scale_factor | 0 > anl_base_thresh | 0 > anl_scale_factor | 0 > vac_cost_delay | 0 > vac_cost_limit | 0 > freeze_min_age | 0 > freeze_max_age | 0 > i was bitten for this already... the problem is that you have all parameters in 0... they should be -1 (specifically max_freeze_age) -- Atentamente, Jaime Casanova Soporte y capacitación de PostgreSQL Asesoría y desarrollo de sistemas Guayaquil - Ecuador Cel. +59387171157
On Fri, 2009-02-13 at 15:51 -0500, Jaime Casanova wrote: > On Fri, Feb 13, 2009 at 3:21 PM, Joshua D. Drake <jd@commandprompt.com> wrote: > > Hello, > > > > I found this today. Note, auto vacuum has been disabled for this > > relation for a very, very long time. At the very end you will see that > > this relation has been autovacuumed previously as well. We have a manual > > cron to vacuum this table every hour so I am unsure why autovacuum is > > doing what it is doing. > > > > app=# select * from pg_autovacuum where vacrelid = '21474846'; > > -[ RECORD 1 ]----+--------- > > vacrelid | 21474846 > > enabled | f > > vac_base_thresh | 0 > > vac_scale_factor | 0 > > anl_base_thresh | 0 > > anl_scale_factor | 0 > > vac_cost_delay | 0 > > vac_cost_limit | 0 > > freeze_min_age | 0 > > freeze_max_age | 0 > > > > i was bitten for this already... the problem is that you have all > parameters in 0... they should be -1 (specifically max_freeze_age) > Thanks for the work around, but that is ridiculous. I still say this is a bug. If I say enabled = f, the *only* thing that should be firing autovacuum on that relation is xid wrap. Sigh... Joshua D. Drake -- PostgreSQL - XMPP: jdrake@jabber.postgresql.org Consulting, Development, Support, Training 503-667-4564 - http://www.commandprompt.com/ The PostgreSQL Company, serving since 1997
"Joshua D. Drake" <jd@commandprompt.com> writes:
> Thanks for the work around, but that is ridiculous. I still say this is
> a bug. If I say enabled = f, the *only* thing that should be firing
> autovacuum on that relation is xid wrap.
Right, and you have the xid wrap timeout set to zero.
regards, tom lane
Joshua D. Drake wrote: > Thanks for the work around, but that is ridiculous. I still say this is > a bug. Yes, which is why we fixed it on 8.4 by dropping pg_autovacuum. (As Jaime and Tom say, it's actually pilot error, but the UI is crap so we fixed it.) -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.
On Monday 16 February 2009 11:20:11 Alvaro Herrera wrote:
> Joshua D. Drake wrote:
> > Thanks for the work around, but that is ridiculous. I still say this is
> > a bug.
>
> Yes, which is why we fixed it on 8.4 by dropping pg_autovacuum. (As
> Jaime and Tom say, it's actually pilot error, but the UI is crap so we
> fixed it.)
>
A little confused by this...
robert=# select version(); version
-----------------------------------------------------------------------------------------------------PostgreSQL
8.4develon i386-pc-solaris2.10, compiled by cc: Sun C 5.9
SunOS_i386 2007/05/03, 32-bit
(1 row)
robert=# \d pg_catalog.pg_autovacuum
Did not find any relation named "pg_catalog.pg_autovacuum".
robert=# \dtS+ pg_catalog.pg_autovacuum List of relations Schema | Name | Type |
Owner | Size | Description
------------+---------------+-------+--------+---------+-------------pg_catalog | pg_autovacuum | table | robert | 0
bytes|
(1 row)
I think this build is a couple weeks old, but is the pg_autovacuum table
really gone in 8.4, or just deprecated?
--
Robert Treat
Conjecture: http://www.xzilla.net
Consulting: http://www.omniti.com
Robert Treat escreveu: > I think this build is a couple weeks old, but is the pg_autovacuum table > really gone in 8.4, or just deprecated? > It is gone. As stated in the docs [1], pg_autovacuum catalog was just a workaround. [1] http://www.postgresql.org/docs/8.3/static/routine-vacuuming.html#AUTOVACUUM -- Euler Taveira de Oliveira http://www.timbira.com/
Euler Taveira de Oliveira <euler@timbira.com> writes: > Robert Treat escreveu: >> I think this build is a couple weeks old, but is the pg_autovacuum table >> really gone in 8.4, or just deprecated? >> > It is gone. http://archives.postgresql.org/pgsql-committers/2009-02/msg00077.php regards, tom lane