ITAGAKI Takahiro <itagaki.takahiro@oss.ntt.co.jp> writes:
> I tested your patch with VACUUM FREEZE. The performance was improved when
> I set scan_recycle_buffers > 32. I used VACUUM FREEZE to increase WAL traffic,
> but this patch should be useful for normal VACUUMs with backgrond jobs!
Proving that you can see a different in a worst-case scenario is not the
same as proving that the patch is useful in normal cases.
regards, tom lane