On Tue, Dec 17, 2019 at 03:30:33PM -0800, Peter Geoghegan wrote:
> With many real world unique indexes, the true reason behind most or
> all B-Tree page splits is "version churn". I view these page splits as
> a permanent solution to a temporary problem -- we *permanently*
> degrade the index structure in order to deal with a *temporary* burst
> in versions that need to be stored. That's really bad.
Yes, I was thinking why do we need to optimize duplicates in a unique
index but then remembered is a version problem.
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
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