> On 6 Jul 2022, at 12:38 PM, Peter Eisentraut <peter.eisentraut@xxxxxxxxxxxxxxxx> wrote: > > On 06.07.22 10:42, Florents Tselai wrote: >> I have a beefy server (40+ worker processes , 40GB+ shared buffers) and a table holding (key text, text text,) of around 50M rows. >> These are text fields extracted from 4-5 page pdfs each. >> I’m adding the following generated col to keep up with tsvectors >> ALTER TABLE docs_text ADD COLUMN ts tsvector GENERATED ALWAYS AS (to_tsvector(’simple', left(text, 1048575))) STORED >> I expect this to be slow, but it’s been running for 18hrs already and I certainly hope I’ve done something wrong and there’s a smarter way. > > Maybe it's stuck on a lock? ALTER TABLE / ADD COLUMN requires an exclusive lock on the table. Looking at pg_locks and pg_stat_activity doesn’t seem like it’s stuck behind something like ACCESS SHARE or similar.
