Re: [HACKERS] Trying to reduce per tuple overhead (bitmap)

Manfred Koizar wrote: > Tom Lane wrote in another tread: > > PS: I did like your point about BITMAPLEN; I think that might be > > a free savings. I was waiting for you to bring it up on hackers > > before commenting though... > So here we go... > > Hi, > > in htup.h MinHeapTupleBitmapSize is de

Re: [HACKERS] Trying to reduce per tuple overhead (bitmap)

Manfred Koizar <[EMAIL PROTECTED]> writes: > Proposal 2: Let BITMAPLEN calculate the minimum number of bytes > necessary to have one bit for every attribute. > #define BitMapBytes 1 > old old new new > NATTS BITMAPLEN THSIZE BITMAPLEN THSIZE > 8436

[HACKERS] Trying to reduce per tuple overhead (bitmap)

Tom Lane wrote in another tread: > PS: I did like your point about BITMAPLEN; I think that might be > a free savings. I was waiting for you to bring it up on hackers > before commenting though... So here we go... Hi, in htup.h MinHeapTupleBitmapSize is defined to be 32, i.e. the bitmap uses at