On Tue, Sep 12, 2006 at 02:26:11PM +0800, Liustech wrote: > My postgres can not start up, I get this error message: > > postmaster successfully started > /usr/bin/postmaster: real and effective user ids must match How are you starting the postmaster? The error suggests that the postmaster or the program that runs the postmaster is setuid. For security reasons PostgreSQL refuses to run that way. -- Michael Fuhr