Re: CREATE TABLE, load and freezing
От | Tom Lane |
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Тема | Re: CREATE TABLE, load and freezing |
Дата | |
Msg-id | 21282.1204256724@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | CREATE TABLE, load and freezing ("Pavan Deolasee" <pavan.deolasee@gmail.com>) |
Ответы |
Re: CREATE TABLE, load and freezing
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Список | pgsql-hackers |
"Pavan Deolasee" <pavan.deolasee@gmail.com> writes: > In a typical scenario, user might create a table and load data in the > table as part of a single transaction (e.g pg_restore). In this case, > it would help if we create the tuples in the *frozen* state to avoid > any wrap-around related issues with the table. We've heard that idea before, and it's just as bad as it was when proposed before. "Pre-frozen" tuples eliminate any possibility of tracking when a tuple was inserted; which is extremely important to know when you are trying to do forensic analysis of a broken table. The point of the current design is to not throw away information about tuple insertion time until the tuple is old enough that the info is (probably) not interesting anymore. regards, tom lane
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