Hi, I though that searches on a table based on oid should be very fast (select * from table where oid=####), however, this doesn't appear to be the case. My assumption was that essentially, if there is no clustering on the table, it is physically ordered by OID. Is that correct? Or vacuum may rearrange tuples without regard of their order? (...how does vacuum cope with clustered tables then?) -alex ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly