Jim Rowan <jmr@computing.com> writes:
> First we multiplied it * 4. This improved the ability to handle complex
> rules, but didn't go far enough... (it still wouldn't handle all of what we
> wanted it to).
> So we multiplied it * 8. Initdb complained about "float4 not
> defined".
There is a poorly-documented restriction that BLCKSZ can't exceed 32K
(IIRC, this is because block offsets are stored in signed shorts somewhere).
Probably would be a good idea to mention this in the comments in
config.h.in.
For the long run it would be nice to remove the restriction. I have no
idea whether that would be easy or hard. Ideally we could do something
like
#if BLCKSZ > 32767typedef int BlockOffset;
#elsetypedef short BlockOffset;
#endif
but finding all the places that need to use the typedef might be a pain.
regards, tom lane
