> I see a lot of this when I'm importing data :
> 
> DEBUG:  copy: line 2865, XLogWrite: new log file created - 
> try to increase WAL_FILES
> 
> Is that anything to be concerned about?

No, WAL_FILES affects performance only.

> Do I need to increase WAL_FILES? If so, how?

You may ignore this for data import, but it's good
to have WAL_FILES >= 1 for database use under high load.
Sorry, Oliver Elphick and me write WAL docs right now -
should be ready in 1-2 days.

Vadim

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