after i backdb->dropdb->restoredb and then vacuum analy+full -> vacuum
freeze
the XID had been increased by 4 billion in two weeks...is it noraml?
what's the definetion of XID?
" select * from mybook" SQL command also increase the XID ?
reference:
http://www.postgresql.org/docs/9.0/static/routine-vacuuming.html
