On Thu, Jun 6, 2013 at 10:46 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > To prevent > : deadlocks we introduce a concept of "triple parity" of pages: if inner tuple > : is on page with BlockNumber N, then its child tuples should be placed on the > : same page, or else on a page with BlockNumber M where (N+1) mod 3 == M mod > 3. > : This rule guarantees that tuples on page M will have no children on page N, > : since (M+1) mod 3 != N mod 3.
Even if the invariant was maintained why doesn't that just mean you need three concurrent inserts to create a deadlock? -- greg -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
