[Geocoding] Slow catching up
Simon Nuttall
info at cyclestreets.net
Sun Jan 26 09:43:23 UTC 2014
When I started the installation of a whole planet Nominatim, back in
early December the initial planet file was already 3 weeks old.
This was compounded by having an invalid:
/Nominatim/settings/configuration.txt
left over from a previous import run, which I did not discover until
several weeks later.
So when I fixed that Nominatim was about 6 weeks behind.
It is going to take about 6 weeks to catch up because it seems to take
almost an hour to update an hour's changeset, eg these couple of lines
of output:
2014-01-26 09:18:42 Completed index step for 2013-12-05T13:29:02Z in
26.8 minutes
2014-01-26 09:18:42 Completed all for 2013-12-05T13:29:02Z in 45.85 minutes
The machine is i/o bound.
During setup.php I used --threads=2 which made things faster.
Can more threads be used during update.php - eg I notice there is this option:
--index-instances
but would that make a difference?
Simon
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