"Etsuro Fujita" writes:
> I'd like to do the complementary explanation of this.
> In tbm_union_page() and tbm_intersect_page() in tidbitmap.c, WORDS_PER_PAGE
> is used in the scan of a lossy chunk, instead of WORDS_PER_CHUNK, where
> these macros are defined as:
> /* number of active words for an
On Fri, Nov 15, 2013 at 12:50 AM, Etsuro Fujita wrote:
>
> I think that, as a secondary effect of the patch, the scan would be
> performed a bit efficiently.
>
>
Hi Etsuro,
Would you be able to supply some benchmarks of a work load which benefits
from this change?
Something which compares patche
I'd like to do the complementary explanation of this.
In tbm_union_page() and tbm_intersect_page() in tidbitmap.c, WORDS_PER_PAGE
is used in the scan of a lossy chunk, instead of WORDS_PER_CHUNK, where
these macros are defined as:
/* number of active words for an exact page: */
#define WORDS_PER_
Hi,
ISTM the code in tidbitmap.c should be improved. Patch attached. I think
this patch increases the efficiency a bit.
Thanks,
Best regards,
Etsuro Fujita
diff --git a/src/backend/nodes/tidbitmap.c b/src/backend/nodes/tidbitmap.c
index 3ef0112..43628ac 100644
--- a/src/backend/node
