Обсуждение: vacuuuuuuum!!!
hi all.
I'm here again.
to PostgreSQL DB, I'm using "vacuum" command in a file which is executed at certain time
in a day by cron
the file is like follows;
psql inmsr <<EOF
delete from "TBL1" where "atime" < 'now';
commit;
delete from "TBL2" where "atime" < 'now';
commit;
delete from "TBL3" where "atime" < 'now';
commit;
vacuum analyze;
commit;
"delete" commands're done successfully, but when looking up the DB files
under /usr/local/pgsql/data/base/ ,
those tables still have some memories.
Also, keys that those tables have seem not to be deleted.
Does command "vacuum cannot clean up the keys ??
How can I "vacuum" up the memories??
OR, I might be wrong in a use of "vacuum" command.
could you tell me how it actually works?
what I want to do with this file is, to clean up the accumlated data from a DB
once in a month, so that we can save memory.
I do aprreciate for your advise. thank you!
hiroko Ogawa