On Thu, Dec 6, 2018 at 10:23 AM Pavel Stehule <pavel.stehule@gmail.com> wrote: > I have a problem to imagine it. When fill factor will be low, then there is high risk of high fragmentation - or there some body should to do defragmentation.
I don't understand this.
I don't know if zheap has or has not any tools for elimination fragmentation of space of page. But I expect so after some set of updates, when record size is mutable, the free space on page should be fragmented. Usually, when you have less memory, then fragmentation is faster.