Masahiko Sawada <sawada.m...@gmail.com> writes: > When do we set the byte on the primary server? If it's the first time > to use the GIN index, secondary servers would have to wait for the > primary to use the GIN index, which could be an unpredictable time or > it may never come depending on index usages. Probably we can make > pg_upgrade set the byte in the meta page of GIN indexes that use the > gin_trgm_ops.
Hmm, perhaps. That plus set-it-during-index-create would remove the need for dynamic update like I suggested. So very roughly the amount of complexity would balance out. Do you have an idea for how we'd get this to happen during pg_upgrade, exactly? regards, tom lane