[OSM-talk] Contours server

Jon Burgess jburgess777 at googlemail.com
Mon Mar 17 22:05:10 GMT 2008

On Mon, 2008-03-17 at 20:28 +0000, Dave Stubbs wrote:
> On Mon, Mar 17, 2008 at 8:00 PM, Steve Hill <steve at nexusuk.org> wrote:
> > Dave Stubbs wrote:
> >
> >  > it's faster to just let it use swap,
> >
> >  I I/O load hits my server pretty hard.  Trying to do anything else while
> >  that's happening is quite painful. :-/
> >
> >  Doing it without the heavy I/O load is preferable, even if it takes a
> >  couple of days - it can just trundle away in the background.
> >
> Yeah, but the postgres middle option just puts the nodes in a postgres
> table and then does selects to find them. If you don't have the RAM to
> cache the DB table you probably will have a similar i/o load just over
> a longer period... 

That is correct. When the --slim option was working the entire import
was IO bound and took several times longer than the RAM approach.

You could try "ionice" but I don't think that helps control swap IO.


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