"scott.marlowe" <scott.marlowe@ihs.com> writes:
> On Fri, 27 Feb 2004, Zeugswetter Andreas SB SD wrote:
>>> How would it get to be empty? Are you thinking of some sort of "connect
>>> database to tablespace" and "disconnect database from tablespace"
>>> commands that would respectively create and delete the per-database
>>> subdirectory? That seems moderately reasonable to me. We could then
>>
>> I would only allow the drop if the directory only contains empty db oid
>> directories.
That's subject to race conditions (ie, someone creating a table about
the same time you are deciding it's okay to drop the tablespace). There
needs to be some interlock, and I think that associating that lock with
infrequently executed connect/disconnect operations would be good from a
performance standpoint.
> Wouldn't this be better tracked in the dependency tracking that's already
> built into postgresql?
No, because dependencies are local to individual databases.
regards, tom lane
