Alvaro Herrera <alvherre@xxxxxxxxxxxxxxxxx> writes: > Mikko Partio escribió: >> Off-topic question: the documentation says that XID numbers are 32 bit. >> Could the XID be 64 bit when running on a 64 bit platform? That would >> effectively prevent wrap-around issues. > No, because they would take too much space in tuple headers. It's worth noting that the patch Florian is working on, to suppress assignment of XIDs for transactions that never write anything, will make for a large reduction in the rate of XID consumption in many real-world applications. That will reduce the need for tuple freezing and probably lessen the attraction of wider XIDs even more. If he gets it done soon (before the HOT dust settles) I will be strongly tempted to try to sneak it into 8.3 ... regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
