> > -------Questions---------------- > > 1) Can you explain me the big difference between the result in A for table > alf_node_properties: 17GB and the result in B: ~6GB ? > > 2) Can you explain me the difference between the result in B: ~6GB and the > result in C, the sum of all column sizes, 3717MB ?
Maybe there are some dead tuples, run a VACUUM FULL (be careful, it requires an explicit lock). And please keep in mind that a table can contains indexes and other objects. A nice explanation and some ways to gather informations on table-, index- and database sizes can you find here: http://andreas.scherbaum.la/blog/archives/282-table-size,-database-size.html
Regards, Andreas -- Really, I'm not out to destroy Microsoft. That will just be a completely unintentional side effect. (Linus Torvalds) "If I was god, I would recompile penguin with --enable-fly." (unknown) Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°