Re: Writing Commit Status hint bits (was Re: [HACKERS] Constant WAL replay)

Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> On Tue, 2005-07-19 at 22:24 -0400, Tom Lane wrote:
>> Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
>>> Short patch enclosed to turn off writing of commit-status hint bits.
>>
>> Doesn't this entirely destroy the ability to truncate clog, and
>> therefore the ability to survive XID wraparound?

> I hope not for all our sakes, since the hint bits are not WAL logged and
> anything that relies upon them would be fragile.

We don't rely on any one write of them to work, but that doesn't mean
that we can indefinitely postpone writing them.

regards, tom lane