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* Vacuuming System DBs like postgres, template1
@ 2025-08-04 03:45 OMPRAKASH SAHU <[email protected]>
2025-08-04 04:47 ` Re: Vacuuming System DBs like postgres, template1 David G. Johnston <[email protected]>
0 siblings, 1 reply; 3+ messages in thread
From: OMPRAKASH SAHU @ 2025-08-04 03:45 UTC (permalink / raw)
To: [email protected]
Hi Team,
We have multitenant architecture in our postgresql servers where we have
more than 200DBs on every server.
On few large DBs we run vacuum analyze manually as well, and I do see few
people vacuuming the template1 db or postgres db also
So just wanted to know vacuum system dbs is required or not?
Regards,
OM
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Vacuuming System DBs like postgres, template1
2025-08-04 03:45 Vacuuming System DBs like postgres, template1 OMPRAKASH SAHU <[email protected]>
@ 2025-08-04 04:47 ` David G. Johnston <[email protected]>
2025-08-04 05:53 ` Re: Vacuuming System DBs like postgres, template1 Ron Johnson <[email protected]>
0 siblings, 1 reply; 3+ messages in thread
From: David G. Johnston @ 2025-08-04 04:47 UTC (permalink / raw)
To: OMPRAKASH SAHU <[email protected]>; +Cc: [email protected]
On Sun, Aug 3, 2025 at 8:45 PM OMPRAKASH SAHU <[email protected]> wrote:
> On few large DBs we run vacuum analyze manually as well, and I do see few
> people vacuuming the template1 db or postgres db also
>
> So just wanted to know vacuum system dbs is required or not?
>
> Pretty sure the answer is yes - though letting auto-vacuum do it is
sufficient - since something has to update the catalog column that
indicates the oldest transaction the database is aware of. There isn't a
value for that which means "everything has been frozen" since it doesn't
get updated in the normal course of activity.
David J.
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Vacuuming System DBs like postgres, template1
2025-08-04 03:45 Vacuuming System DBs like postgres, template1 OMPRAKASH SAHU <[email protected]>
2025-08-04 04:47 ` Re: Vacuuming System DBs like postgres, template1 David G. Johnston <[email protected]>
@ 2025-08-04 05:53 ` Ron Johnson <[email protected]>
0 siblings, 0 replies; 3+ messages in thread
From: Ron Johnson @ 2025-08-04 05:53 UTC (permalink / raw)
To: Pgsql-admin <[email protected]>
On Mon, Aug 4, 2025 at 12:48 AM David G. Johnston <
[email protected]> wrote:
> On Sun, Aug 3, 2025 at 8:45 PM OMPRAKASH SAHU <[email protected]>
> wrote:
>
>> On few large DBs we run vacuum analyze manually as well, and I do see few
>> people vacuuming the template1 db or postgres db also
>>
>> So just wanted to know vacuum system dbs is required or not?
>>
>> Pretty sure the answer is yes - though letting auto-vacuum do it is
> sufficient - since something has to update the catalog column that
> indicates the oldest transaction the database is aware of. There isn't a
> value for that which means "everything has been frozen" since it doesn't
> get updated in the normal course of activity.
>
template1 needs to be regularly vacuumed?
--
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!
^ permalink raw reply [nested|flat] 3+ messages in thread
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2025-08-04 03:45 Vacuuming System DBs like postgres, template1 OMPRAKASH SAHU <[email protected]>
2025-08-04 04:47 ` David G. Johnston <[email protected]>
2025-08-04 05:53 ` Ron Johnson <[email protected]>
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