Re: vacuum vs open transactions

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От Ed L.
Тема Re: vacuum vs open transactions
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Msg-id 200501121149.12804.pgsql@bluepolka.net
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Ответ на Re: vacuum vs open transactions  (Scott Marlowe <smarlowe@g2switchworks.com>)
Ответы Re: vacuum vs open transactions
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On Wednesday January 12 2005 11:10, Scott Marlowe wrote:
>
> I believe the problem is occurring if the open transaction is older than
> the tuples that could be vacuumed.  The MVCC system means that as long
> as a transaction that started X hours ago is still open, the tuples that
> have been freed since then can't vacuumed because they need to stay
> visible for that transaction.

Is it possible via SQL query to tell how long a transaction has been open?

Ed


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