Le ven. 27 nov. 2020 à 16:05, Alvaro Herrera <alvherre@xxxxxxxxxxxxxx> a écrit :
On 2020-Nov-27, Alexander Farber wrote:
> Referenced by:
> TABLE "words_chat" CONSTRAINT "words_chat_gid_fkey" FOREIGN KEY (gid)
> REFERENCES words_games(gid) ON DELETE CASCADE
> TABLE "words_moves" CONSTRAINT "words_moves_gid_fkey" FOREIGN KEY (gid)
> REFERENCES words_games(gid) ON DELETE CASCADE
> TABLE "words_scores" CONSTRAINT "words_scores_gid_fkey" FOREIGN KEY
> (gid) REFERENCES words_games(gid) ON DELETE CASCADE
Make sure you have indexes on the gid columns of these tables. Delete
needs to scan them in order to find the rows that are cascaded to.
An index on words_games(finished) and words_moves(played) would help too.
--
Guillaume.
