On 7/1/16 2:23 PM, Andres Freund wrote:
> The only
> cost of that is that vacuum will come along and mark the page
> all-visible again instead of skipping it, but that's probably not an
> enormous expense in most cases.
I think the main cost is not having the page marked as all-visible for
index-only purposes. If it's an insert mostly table, it can be a long
while till vacuum comes around.

ISTM that's something that should be addressed anyway (and separately), no?
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)   mobile: 512-569-9461

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