Tham Shiming <shiming@xxxxxxxxxxxxxx> writes: > ctid(tid) xmin(xid) xmax(xid) datname(name) > (0,5) 2 2213800494 db2 (pgAdmin says this DB does not > exist) > (0,8) 2 2214815770 db3 (pgAdmin says this DB does not > exist) > (0,10) 2 2213853192 db5 (repeat) > (0,13) 2 0 db5 (repeat) This does start to look like an XID wraparound problem. What is your current XID counter? (The "NextXID" line from pg_controldata output is close enough.) What *exactly* do you mean by "pgAdmin says this DB does not exist"? regards, tom lane