Thread: pgsql: Teach TID store to skip bitmap for small numbers of offsets
Teach TID store to skip bitmap for small numbers of offsets The header portion of BlocktableEntry has enough padding space for an array of 3 offsets (1 on 32-bit platforms). Use this space instead of having a sparse bitmap array. This will take up a constant amount of space no matter what the offsets are. Reviewed (in an earlier version) by Masahiko Sawada Discussion: https://postgr.es/m/CANWCAZYw+_KAaUNruhJfE=h6WgtBKeDG32St8vBJBEY82bGVRQ@mail.gmail.com Discussion: https://postgr.es/m/CAD21AoBci3Hujzijubomo1tdwH3XtQ9F89cTNQ4bsQijOmqnEw@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/f35bd9bf359d3d740063997e1cbab9b69df7af99 Modified Files -------------- src/backend/access/common/tidstore.c | 129 +++++++++++++++------ .../test_tidstore/expected/test_tidstore.out | 28 +++++ .../modules/test_tidstore/sql/test_tidstore.sql | 10 ++ 3 files changed, 130 insertions(+), 37 deletions(-)