Simon Riggs wrote: > On Fri, 2008-03-28 at 10:35 -0300, Alvaro Herrera wrote: > > > The problem is that we always consider every transaction's PGPROC->xid > > in calculating MyProc->xmin. So if you have a long running > > transaction, it doesn't matter how far beyond the snapshots are -- the > > value returned by GetOldestXmin will always be at most the old > > transaction's Xid. Even if that transaction cannot see the old rows > > because all of its snapshots are way in the future. > > It may not have a TransactionId yet.
How is this a problen? If it ever gets one, it will be in the future. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
