On Mon, Nov 28, 2016 at 9:20 AM, Thomas Munro
<thomas.mu...@enterprisedb.com> wrote:
> It would work, but I suppose you might call it overkill.  If they were
> cooperating to build the bitmap in parallel then a barrier might look
> more tempting, because then they'd all be waiting for each other to
> agree that they've all finished doing that and are ready to scan.
> When they're all just waiting for one guy to flip a single bit, then
> it's debatable whether a barrier is any simpler than a condition
> variable + a spinlock + a bit!


Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com

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