On Wed, Aug 30, 2017 at 4:28 AM, Luca Looz <luca.looz92@xxxxxxxxx> wrote: > I'm trying to use the serializable isolation but i'm getting read/write > dependencies error even if i have an unique index on the column used and the > transactions are using different keys. > For an example see this gist: > https://gist.github.com/nathanl/f98450014f62dcaf0405394a0955e18e > Is this an expected behavior? Take a look at the EXPLAIN plan for the SELECT. You'll get fine grained SIREAD locks if it's doing a btree index scan, but table-level SIREAD locks for other kinds of plans. Sometimes simple SSI tests can show a lot of false positives just because of empty tables or missing statistics (ANALYZE). -- Thomas Munro http://www.enterprisedb.com -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
