Re: fallocate / posix_fallocate for new WAL file creation (etc...)

On 2013-05-30 08:19:17 -0400, Peter Eisentraut wrote:
> On 5/30/13 8:02 AM, Robert Haas wrote:
> > If there's some OS out
> > there that chooses to fill the pre-extended pages with 0x55 or cat
> > /dev/urandom instead of 0x00, they probably deserve what they get.
> 
> Even that wouldn't be a problem for our purpose.  The only problem would
> be if you can't read from the allocated region at all.

Well, only as long as we only use it for preallocation of wal files. I
am much, much more interested in doing that for the heap. And there that
surely would be a problem.

Greetings,

Andres Freund

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