Re: DELETE eats up all memory and crashes box - Mailing list pgsql-general

From Worky Workerson
Subject Re: DELETE eats up all memory and crashes box
Date
Msg-id ce4072df0610061223q16a76ae7sd394762f9ef6ada4@mail.gmail.com
Whole thread Raw
In response to Re: DELETE eats up all memory and crashes box  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-general
> Note that whether you have CASCADE or not is not the issue --- if you
> are doing a delete in a foreign-key-referenced relation at all, you
> are going to have a trigger event per deleted row no matter what the
> details of the FK are.

So the best/fastest* way to do this would be to remove the FK
relationship from the tables, delete all my rows with DELETE ... WHERE
ip IN (SELECT ...) in the previously FK-ed tables,  delete all the
rows in the PK table, then recreate the FK relationships?  I tried
this and it was pretty snappy, assuming that all the indexes are
built.

*note: loading/creating a datawarehouse, guaranteed exclusive access.
Current DW size is about 10 GB.

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