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* what is maximum allowed value of autovacuum_freeze_max_age
@ 2012-09-12 22:44 Radovan Jablonovsky <radovan.jablonovsky@replicon.com>
0 siblings, 0 replies; 4+ messages in thread
From: Radovan Jablonovsky @ 2012-09-12 22:44 UTC (permalink / raw)
To: pgsql-admin
Hello,
In documentation
http://www.postgresql.org/docs/9.1/static/routine-vacuuming.html is this
information about autovacuum_freeze_max_age: "if autovacuum_freeze_max_age is
set to its maximum allowed value of a little less than two billion". What
is exact maximum allowed value of autovacuum_freeze_max_age?
Sincerely,
Radovan Jablonovsky
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: what is maximum allowed value of autovacuum_freeze_max_age
@ 2012-09-13 03:13 Kevin Grittner <Kevin.Grittner@wicourts.gov>
2012-09-14 00:56 ` Re: what is maximum allowed value of autovacuum_freeze_max_age Bruce Momjian <bruce@momjian.us>
0 siblings, 1 reply; 4+ messages in thread
From: Kevin Grittner @ 2012-09-13 03:13 UTC (permalink / raw)
To: pgsql-admin; radovan.jablonovsky@replicon.com
Radovan Jablonovsky wrote:
> In documentation
> http://www.postgresql.org/docs/9.1/static/routine-vacuuming.html
> is this information about autovacuum_freeze_max_age: "if
> autovacuum_freeze_max_age is set to its maximum allowed value of a
> little less than two billion". What is exact maximum allowed value
> of autovacuum_freeze_max_age?
test=# select name, setting, min_val, max_val
test-# from pg_settings where name = 'autovacuum_freeze_max_age';
name | setting | min_val | max_val
---------------------------+-----------+-----------+------------
autovacuum_freeze_max_age | 200000000 | 100000000 | 2000000000
(1 row)
Perhaps we should drop "a little less than" from the docs.
-Kevin
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: what is maximum allowed value of autovacuum_freeze_max_age
2012-09-13 03:13 Re: what is maximum allowed value of autovacuum_freeze_max_age Kevin Grittner <Kevin.Grittner@wicourts.gov>
@ 2012-09-14 00:56 ` Bruce Momjian <bruce@momjian.us>
0 siblings, 0 replies; 4+ messages in thread
From: Bruce Momjian @ 2012-09-14 00:56 UTC (permalink / raw)
To: Kevin Grittner <Kevin.Grittner@wicourts.gov>; +Cc: pgsql-admin; radovan.jablonovsky@replicon.com
On Wed, Sep 12, 2012 at 10:13:38PM -0500, Kevin Grittner wrote:
> Radovan Jablonovsky wrote:
>
> > In documentation
> > http://www.postgresql.org/docs/9.1/static/routine-vacuuming.html
> > is this information about autovacuum_freeze_max_age: "if
> > autovacuum_freeze_max_age is set to its maximum allowed value of a
> > little less than two billion". What is exact maximum allowed value
> > of autovacuum_freeze_max_age?
>
> test=# select name, setting, min_val, max_val
> test-# from pg_settings where name = 'autovacuum_freeze_max_age';
> name | setting | min_val | max_val
> ---------------------------+-----------+-----------+------------
> autovacuum_freeze_max_age | 200000000 | 100000000 | 2000000000
> (1 row)
>
> Perhaps we should drop "a little less than" from the docs.
Agreed. My guess it they were really talking about the 2-billion that
is a power of 2, but I think just saying 2 billlion is better.
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: what is maximum allowed value of autovacuum_freeze_max_age
@ 2012-09-16 17:38 Kevin Grittner <Kevin.Grittner@wicourts.gov>
0 siblings, 0 replies; 4+ messages in thread
From: Kevin Grittner @ 2012-09-16 17:38 UTC (permalink / raw)
To: bruce@momjian.us; +Cc: pgsql-admin; radovan.jablonovsky@replicon.com
Bruce Momjian wrote:
> On Wed, Sep 12, 2012 at 10:13:38PM -0500, Kevin Grittner wrote:
>> Radovan Jablonovsky wrote:
>>
>>> In documentation
>>> http://www.postgresql.org/docs/9.1/static/routine-vacuuming.html
>>> is this information about autovacuum_freeze_max_age: "if
>>> autovacuum_freeze_max_age is set to its maximum allowed value of
>>> a little less than two billion". What is exact maximum allowed
>>> value of autovacuum_freeze_max_age?
>> Perhaps we should drop "a little less than" from the docs.
>
> Agreed.
Hearing no objection, done. Back-patched to 8.3 on the basis that
this was a bug in the documentation, and one which has actually
caused end-user confusion.
-Kevin
^ permalink raw reply [nested|flat] 4+ messages in thread
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-- links below jump to the message on this page --
2012-09-12 22:44 what is maximum allowed value of autovacuum_freeze_max_age Radovan Jablonovsky <radovan.jablonovsky@replicon.com>
2012-09-13 03:13 Re: what is maximum allowed value of autovacuum_freeze_max_age Kevin Grittner <Kevin.Grittner@wicourts.gov>
2012-09-14 00:56 ` Bruce Momjian <bruce@momjian.us>
2012-09-16 17:38 Re: what is maximum allowed value of autovacuum_freeze_max_age Kevin Grittner <Kevin.Grittner@wicourts.gov>
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