On 10/04/2015 06:16 PM, Tom Lane wrote:
Peter Geoghegan <p...@heroku.com> writes:
To be clear: I wasn't sure why you though I falsely count entries with
dropped texts within entry_dealloc().
In the existing^H^H^Hprevious code, dropped-text entries would essentially
act as length-zero summands in the average calculation, whereas I think
we agree that they ought to be ignored; otherwise they decrease the
computed mean and thereby increase the probability of (useless) GC cycles.
In the worst case where the hashtable is mostly dropped-text entries,
which would for instance be the prevailing situation shortly after a GC
failure, we'd be calculating ridiculously small mean values and that'd
prompt extra GC cycles no?


Sorry, I'm a bit late to this party. Does what you have committed mean people are less likely to see "Out of Memory" coming from pg_stat_statements? If not, what can be done about them short of a restart? And what bad effects follow from an event generating them?

The docs seem to be quite silent on these points.



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