"Tom Lane" <[EMAIL PROTECTED]> writes: > Josh Berkus <[EMAIL PROTECTED]> writes: >> I've just noticed that pg_controldata doesn't say anything about whether >> the database is 64-bit or 32-bit. > > That's because there is no such concept.
I think the relevant concept is whether Datum is 32-bit or 64-bit wide. My first thought was that surely the structure would be massively different on a 64-bit architecture though? But actually I'm not sure that's true. There's an Oid in the checkpoint record which is an "unsigned int" so at least ILP64 architectures would be distinguished but I can't find any "long" members or pointers so an LP64 architecture actually would have the same member sizes as a 32-bit architecture. So if there's an LP64 architecture which has the same maxalign (presumably 64-bit for doubles) as its 32-bit cousin then it's actually possible we wouldn't notice? -- Gregory Stark EnterpriseDB http://www.enterprisedb.com Get trained by Bruce Momjian - ask me about EnterpriseDB's PostgreSQL training! ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
