| From: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
|---|---|
| To: | Moin Akther <moindba(at)hotmail(dot)com>, "pgsql-admin(at)lists(dot)postgresql(dot)org" <pgsql-admin(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Adding Column on Huge Table |
| Date: | 2019-03-19 17:02:19 |
| Message-ID: | 6fff7b00a759e89f6468757602ac752c8d4ffdfc.camel@cybertec.at |
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| Lists: | pgsql-admin |
Moin Akther wrote:
> We want to add a column on table size of 1.5TB, we have to perform this activity with minimal downtime.
>
> What are the best practises to add a column on huge table ?
>
> How much time alter statement will take to add column ?
>
> Any alternate solution other than alter statement to add column ?
>
> Will adding a new column on a huge table generate huge WAL files ?
As a quick experiment would have told you, adding a column without a DEFAULT
clause is very fast. Since v11, it is fast even if the new column has a
DEFAULT clause.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
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