Simon Riggs <simon@2ndquadrant.com> wrote:
> > Furthermore, this patch detaches empty fsmpages then.
> Does that do anything useful though?
> I thought we don't reallocate until VACUUM time, whereupon we identify
> any empty slots and reuse them. Who cares whether we deallocate earlier?
Yes, we cannot reuse them until next VACUUM.
But I think it is a problem that FSMs keep being scanned after they are almost empty.
In such a case, most stored pages are touched whenever new pages
are requested. I intended to cut FSMs earlier in order to omit the scans.
---
ITAGAKI Takahiro
NTT Cyber Space Laboratories
