Tom Lane wrote:

> What I think we need to do about this is
> (1) fix pgstat_vacuum_tabstats to have non-O(N^2) behavior; I'm thinking
> of using a hash table for the OIDs instead of a linear list.  Should be
> a pretty small change; I'll work on it today.
> (2) Reconsider whether last-vacuum-time should be sent to the collector
> unconditionally.

(2) seems a perfectly reasonably answer, but ISTM (1) would be good to
have anyway (at least in HEAD).

Alvaro Herrera                      
The PostgreSQL Company - Command Prompt, Inc.

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