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* Does pg_reset_stats() influence autovacuum?
@ 2012-08-23 07:59 Kouber Saparev <postgres@saparev.com>
2012-08-24 02:47 ` Re: Does pg_reset_stats() influence autovacuum? Bruce Momjian <bruce@momjian.us>
0 siblings, 1 reply; 3+ messages in thread
From: Kouber Saparev @ 2012-08-23 07:59 UTC (permalink / raw)
To: pgsql-admin
Hello,
Does resetting of stats through pg_reset_stats() influence the way
autovacuum determines whether autovacuum_vacuum_scale_factor and
autovacuum_analyze_scale_factor settings are reached?
In other words, are the n_live_tup and n_dead_tup values kept somewhere
internally, apart pg_stat_all_tables?
--
Kouber Saparev
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Does pg_reset_stats() influence autovacuum?
2012-08-23 07:59 Does pg_reset_stats() influence autovacuum? Kouber Saparev <postgres@saparev.com>
@ 2012-08-24 02:47 ` Bruce Momjian <bruce@momjian.us>
2012-08-28 08:36 ` Re: Does pg_reset_stats() influence autovacuum? Kouber Saparev <postgres@saparev.com>
0 siblings, 1 reply; 3+ messages in thread
From: Bruce Momjian @ 2012-08-24 02:47 UTC (permalink / raw)
To: Kouber Saparev <postgres@saparev.com>; +Cc: pgsql-admin
On Thu, Aug 23, 2012 at 10:59:56AM +0300, Kouber Saparev wrote:
> Hello,
>
> Does resetting of stats through pg_reset_stats() influence the way
> autovacuum determines whether autovacuum_vacuum_scale_factor and
> autovacuum_analyze_scale_factor settings are reached?
>
> In other words, are the n_live_tup and n_dead_tup values kept somewhere
> internally, apart pg_stat_all_tables?
No. pg_reset_stats() will affect autovacuum, usually in a bad way.
--
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] 3+ messages in thread
* Re: Does pg_reset_stats() influence autovacuum?
2012-08-23 07:59 Does pg_reset_stats() influence autovacuum? Kouber Saparev <postgres@saparev.com>
2012-08-24 02:47 ` Re: Does pg_reset_stats() influence autovacuum? Bruce Momjian <bruce@momjian.us>
@ 2012-08-28 08:36 ` Kouber Saparev <postgres@saparev.com>
0 siblings, 0 replies; 3+ messages in thread
From: Kouber Saparev @ 2012-08-28 08:36 UTC (permalink / raw)
To: pgsql-admin
On 08/24/2012 05:47 AM, Bruce Momjian wrote:
> On Thu, Aug 23, 2012 at 10:59:56AM +0300, Kouber Saparev wrote:
>> Hello,
>>
>> Does resetting of stats through pg_reset_stats() influence the way
>> autovacuum determines whether autovacuum_vacuum_scale_factor and
>> autovacuum_analyze_scale_factor settings are reached?
>>
>> In other words, are the n_live_tup and n_dead_tup values kept somewhere
>> internally, apart pg_stat_all_tables?
>
> No. pg_reset_stats() will affect autovacuum, usually in a bad way.
>
So, I guess the only safe moment to reset stats is right after manual
vacuum analyze.
Thanks.
--
Kouber Saparev
^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2012-08-28 08:36 UTC | newest]
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2012-08-23 07:59 Does pg_reset_stats() influence autovacuum? Kouber Saparev <postgres@saparev.com>
2012-08-24 02:47 ` Bruce Momjian <bruce@momjian.us>
2012-08-28 08:36 ` Kouber Saparev <postgres@saparev.com>
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