Re: [HACKERS] Open 6.5 items

> > I thought we decided that file descriptors are kept by backends, and are
> > still accessable while new backends don't see the files.  Correct?
> >
> 
> Yes,other backends could write to unliked files which would be 
> vanished before long.
> I think it's more secure to truncate useless segments to size 0 
> than unlinking the segments though vacuum would never remove 
> useless segments.

If you truncate, other backends will see the data gone, and will be
writing into the middle of an empty file.  Better to remove.

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