Re: does refreshing materialized view make the database bloat?

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От David G. Johnston
Тема Re: does refreshing materialized view make the database bloat?
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Msg-id CAKFQuwauJe7RmT9aW-W3EJwT3DKjzJ-iW=pQ-g8JnNeayRnhHw@mail.gmail.com
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Ответ на Re: does refreshing materialized view make the database bloat?  (jian he <jian.universality@gmail.com>)
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On Sunday, January 15, 2023, jian he <jian.universality@gmail.com> wrote:


In the following example, I cannot see bloat (via extension pgstattuple dead_tuple_count>0). Wondering where the bloat is.

--------do the update.
update tbt set a = 10 + a  where a < 20;
REFRESH MATERIALIZED view tbtmv;
SELECT * FROM pgstattuple('tbtmv'); -----no dead tuples count.

You didn’t specify concurrently so the merge method you quoted is not being used.

David J.
 

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