Re: Reducing overhead for repeat de-TOASTing

> But we can resolve that by ruling that the required lifetime is the same
> as the value would have had if it'd really been palloc'd --- IOW, until
> the memory context that was current at the time gets deleted or reset.

Many support functions of GiST/GIN live in very short memory context - only for 
one call. So, that cache invalidation technique doesn't give any advantage 
without rearranging this part.

-- 
Teodor Sigaev                                   E-mail: teodor@sigaev.ru
  WWW: http://www.sigaev.ru/