Re: Less than ideal error reporting in pg_stat_statements

Peter Geoghegan <pg@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?
        regards, tom lane