Amit Kapila <amit.kapil...@gmail.com> wrote: > Could you please explain in slightly more detail why can't it work> if we use > timestamp instead of snapshot->xmin in your patch in
> function TestForOldSnapshot()? It works fine for the additional visibility checking in scans, but it doesn't cover the vacuuming -- that needs to use a transaction ID for its cutoff. > How exactly will this allow to return "snapshot old" error, do we > need a check for page (page lsn) as in your current patch? The change to the part where it actually throws the error is very small, just checking time instead of xmin. -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
