[ADMIN] Transaction ID's and Vacuum

[Samuel Stearns]

Howdy,

I've got an old 7.4.5 instance of Postgres running on Linux.  My transaction 
ID's are just over the 1 billion mark.  I ran an instance wide vacuum analyse 
but this had now effect on the transaction ID count.  Do I need to run a vacuum 
full?

Thanks,

Sam