pgsql: Parameter toast_tuple_target controls TOAST for new rows

Parameter toast_tuple_target controls TOAST for new rows

Specifies the point at which we try to move long column values
into TOAST tables.

No effect on existing rows.

Discussion: https://postgr.es/m/CANP8+jKsVmw6CX6YP9z7zqkTzcKV1+Uzr3XjKcZW=2Ya00OyQQ@mail.gmail.com

Author: Simon Riggs <simon(at)2ndQudrant(dot)com>
Reviewed-by: Andrew Dunstan <andrew(dot)dunstan(at)2ndQuadrant(dot)com>

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/c2513365a0a85e77d3c21adb92fe12cfbe0d1897

Modified Files
--------------
doc/src/sgml/ref/alter_table.sgml | 2 +-
doc/src/sgml/ref/create_table.sgml | 21 +++++++++++++++
src/backend/access/common/reloptions.c | 12 +++++++++
src/backend/access/heap/tuptoaster.c | 2 +-
src/include/utils/rel.h | 9 +++++++
src/test/regress/expected/strings.out | 47 ++++++++++++++++++++++++++++++++++
src/test/regress/sql/strings.sql | 19 ++++++++++++++
7 files changed, 110 insertions(+), 2 deletions(-)