[Tilesathome] Long Request Take Time?

[Florian Lohoff]

On Thu, Sep 11, 2008 at 10:26:40AM -0500, Ian Dees wrote:
> Subject: Re: [Tilesathome] Long Request Take Time?
> 
> On Thu, Sep 11, 2008 at 10:16 AM, Dirk-Lüder Kreie <osm-list at deelkar.net>wrote:
> 
> > Florian Lohoff schrieb:
> >
> >> Yes - the goal should be that the bottleneck to always be the clients to
> >> keep them busy all the time but this needs more work to be done and the
> >> empty prio4 brought everything out of balance.
> >>
> >
> > This is virtually impossible, as you can always throw more clients at the
> > problem.
> 
> Where is the bottleneck now? As you mentioned earlier, the OSM API was
> before, but with Flo's ROMA setup, is that situation better? Is the TAH
> server setup (NFS-backed database tables) a problem?

With prio4 empty tiles its the upload queue - without the
client. Typically one can see the phase in the munin graphs - if you
have > 3ktiles/h and a full queue we are crunching through prio4 empty
tiles. If you see something like 6-800Tiles/h we are working on prio1/2.

Now with the throtteling in the request handler you'll not see a full
queue but rather a queue between 700-1000 entries.

Flo
-- 
Florian Lohoff                  flo at rfc822.org             +49-171-2280134
	Those who would give up a little freedom to get a little 
          security shall soon have neither - Benjamin Franklin
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