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Hi All,
We have a big difference between du and PG_CLASS:
du -hs ./base/17613 21G ./base/17613
select sum(relpages)*8/1024/1024 from pg_class; ?column? ---------- 11 (1 row)
I am sure I run the select under the right database (17613).
I know there are some files under: du -hs base/17613/pgsql_tmp 1.7G base/17613/pgsql_tmp
But the difference is still around 8G (21G – 11G – 1.7G).
When I check timestamp on files under directory 17613, I found there are many old relfilenode which do not exist in the pg_class any more. We had bounced the PG server, those files are still there.
Does PG remove those files which are not longer used by PG after server bounce?
Which files can I safely delete?
Thanks,
PS: PG version 7.3.2 and OS version Red Hat Linux release 7.3 (Valhalla) |
