[Tilesathome] lowzoom rendering takes forever?

[Christopher Schmidt]

On Fri, Nov 23, 2007 at 11:21:08PM +0100, Thomas Stets wrote:
>  [#33   0% jobinit] Doing tileset 146,99 (zoom 8) (area around
> 37.158240,26.015625)
>  [#33   0% lowzoom] Rendering...
> 
> It seems that the client is trying to do a lowzoom rendering, but its
> been sitting at 0% for several hours now.
> It still takes up one CPU (of my dual G5 Mac).

Okay, this seems to be a serious problem. Since the enabling of lowzoom
requests being handed out to clients, we've seen a significant downturn
in the number of bytes being uploaded to the server, and a lot more
tiles end up not completing in the 1.5 hours, and re-requested.

I can't comment on exactly why this is, but I can comment that I'm
seeing xmlstarlet taking minutes -- up to 10 -- to transform a single
lvl 8 dataset. Tileset 126,83 (zoom 8) is currently on its 15th minute
of renering, and it's only on 'Transforming zoom level 9'. (Now 22
minutes in, and transforming level 10.) 

I don't know anything about the client, but *something* isn't right
here, and it might make sense to figure out what. 

Regards,
-- 
Christopher Schmidt
MetaCarta