It could be that he only restored *some* tables in an existing database. On Wed, Dec 18, 2024 at 7:02 PM Saul Perdomo <saul.perd...@gmail.com> wrote:
> Genuine question: Why are you looking to recover from this half-cooked > state instead of restarting the restore process from the beginning? > > On Tue, Dec 17, 2024, 1:10 a.m. Ivan Kurnosov <zer...@zerkms.com> wrote: > >> The scenario: >> >> 1. There is a postgresql 17 server running >> 2. Restore dump with `--single-transaction` flag >> 3. For whatever reason the server goes away (eg: we kill the process) >> 4. Now `base` directory is filled with abandoned table files which >> postgresql know nothing about >> >> Playground: >> >> Terminal 1: >> Start server: `docker run --rm -it -e POSTGRES_HOST_AUTH_METHOD=trust -v >> $PWD/postgres:/var/lib/postgresql/data postgres:17.2` >> >> Terminal 2: >> 1. Start container with recent pg_restore: `docker run --rm -it -v >> $PWD:/app -w /app postgres:17.2 bash` >> 2. Start dump recovery: `pg_restore -h 172.17.0.2 -U postgres -d postgres >> --single-transaction -v -Fc --no-owner dump.sql` >> >> Terminal 3: >> 1. Find what container is the server: `docker ps` >> 2. Kill it: `docker kill d7ecf6e66c1d` >> >> Terminal 1: >> Start the server again, with the same command >> >> Terminal 3: >> Check there are abandoned large files: >> ``` >> # ls -la /home/ivan/postgres/base/5 >> <truncated> >> -rw------- 1 systemd-coredump systemd-coredump 342884352 Dec 17 18:58 >> 16399 >> -rw------- 1 systemd-coredump systemd-coredump 11149312 Dec 17 18:58 >> 16404 >> -rw------- 1 systemd-coredump systemd-coredump 188416 Dec 17 18:58 >> 16403_fsm >> -rw------- 1 systemd-coredump systemd-coredump 686145536 Dec 17 18:58 >> 16403 >> ``` >> >> Terminal 2: >> 1. Confirm those OIDs are not accounted: >> ``` >> psql -h 172.17.0.2 -U postgres -c 'select * from pg_class'|grep 16404 >> psql -h 172.17.0.2 -U postgres -c 'select * from pg_class'|grep 16403 >> psql -h 172.17.0.2 -U postgres -c 'select * from pg_class'|grep 16399 >> ``` >> >> Hence a question: am I doing something wrong? Is it expected behaviour? >> If so - how would one recover from this scenario now WITHOUT dropping >> entire database? >> >> -- >> With best regards, Ivan Kurnosov >> > -- Death to <Redacted>, and butter sauce. Don't boil me, I'm still alive. <Redacted> lobster!
