Hello,
if downtime would also effect the delivery of existing tiles, we could
close the map in german geohack for this time, because it's seems the
smallest lost for users and a lot of requests comes from there.
If downtime would only influence the rendering, a downtime over european night
seem no bigger problem for me. Mostly we rendering only dirty files
and have also fallback to
OSM.org tiles.
I'm not sure what with the comparison with
osm.org, because it's
difficult to compare the different renderd/tirex statistics.
Greetings Kolossos
Zitat von River Tarnell <river.tarnell(a)wikimedia.de>de>:
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Hi,
As I understand it, our database/tile server (ptolemy) is higher
spec than the
equivalent hardware at
OSM.org, yet it performs much worse (e.g. at rendering
tiles). Is this correct?
If so, has anyone compared the indices on ptolemy's database to OSM's?
If that is not the problem, I would like to test performance without VxVM
between the filesystem and the disk. While Vx doesn't hurt performance with
MySQL, I noticed during testing that it significantly reduced import
performance with Postgres. I believe that was fixed by putting pg_xlog on a
separate (non-Vx) disk, but it may still be hurting read performance.
Testing this will require some downtime for conversion; based on the
amount of
data, I would estimate about 8 hours to copy the data off and back again.
- river.
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