Hi, It's just a subset of tiles.
The os is 32bit version of Centos5 - It is a virtual server running on an 8 core / 32gb ram machine. I ran render_old with the default flag, however this doesn't seem to have had any affect. On 19 February 2010 18:59, Jon Burgess <[email protected]> wrote: > On Fri, 2010-02-19 at 14:40 +0000, Richard Ive wrote: > > > > On 19 February 2010 14:24, John Smith <[email protected]> > > wrote: > > On 19 February 2010 22:01, Lennard <[email protected]> wrote: > > > The one major cause of flooded tiles is when mapnik doesn't > > process the > > > coastline shapefiles. At z10, it switches from the lowzoom > > shoreline_300 > > > to the full resolution processed_p shapefile. So focus your > > effort on > > > that one. > > > > > > Also these shape files are only updated intermitently, so even > > if you > > make a change to fix problems with coastlines it might take > > weeks or a > > month before the changes will be reflected in OSM tiles. > > > > Sorry guys, not sure I'm following here. > > > > I understand what you mean by shape files, but I haven't changed > > anything on the server at all in the 3 months I've had it up and > > running. The only thing that has changed is the database, because I > > import daily change sets into the gis database and even that is on a > > completely different physical machine. Why should my tiles be > > affected, but osm.org's not? > > > > Cheers for the replies so far! Hopefully I'll catch on soon. > > Do all the high zoom tiles have the same issue or just a subset? > Are you running on a 32 bit machine or using a 32 bit renderd process? > > Since the shapefiles are quite large it is possible that you run into > problems with running multiple rendering threads in parallel. Mapnik > tries to mmap() the file in each rendering thread and will quickly run > out of space in a 32 bit process. Try running with a lower "-n" value, > perhaps try just 1 to start with, then only one thread will be actively > rendering at a time. > > Most modern multi-core systems will run a 64 bit OS and do not have this > issue. > > Jon > > > -- Regards, Richard Ive.
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