http://www.postgresql.org/docs/8.1/interactive/maintenance.html#VACUUM-FOR-WRAPAROUND XID is transcation ID? so, "select * from mydb" is a transcation? if i executed "select * from mydb" twice, the XID wil be increased by 2 or ,just the "update","delete" command can be counted -- View this message in context: http://www.nabble.com/What%27s-the-XID--tp14508639p14508639.html Sent from the PostgreSQL - admin mailing list archive at Nabble.com. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
