This was not working anymore since 273973e which moved the sources to a src/
directory in order to clean up the top level directory, which broke the package
build. However, debian/rules already contains calls to 'make' which install
mod_tile.so to the correct location, so it's not even necessary to install it
using debian/libapache2-mod-tile.install.
request doesn't fit into a rendering queue
RenderPrio, Render and RenderLow queues each only have a size of 32 entries. If these are full,
then requests overflow into the dirty queue. If this happens, renderd should send the NotDone
back immediately so that mod_tile doesn't wait for potentially a long time.
This however only worked for Render requests, but not RenderPrio or RenderLow. This patch fixes this.
* Only treat OPTIONS as preflight if Access-Control-Request-Method is set
* Only send Access-Control-Allow-Headers for preflight requests
* Don't send a bogus Access-Control-Allow-Headers value
This likely needs more improvements to make the readme actually useful.
But for now this mostly removes parts of the readme that were totally
out of date and confusing.
sets the new MaxLoadMissing to 50 and MaxLoadOld to 16.
With the prevalence of multi core servers today, the previous
default thresholds of 10 and 5 were becoming to lower than the average
CPU count. Furthermore, load is not an ideal measure, as it includes I/O
load and much of the I/O load might well come from serving rather than
rendering. Especially if the database is on a separate SSD. Lastly, using
the thresholds in mod_tile isn't super helpful, as due to hysteresis of
rendering queues stop submitting tiles at a time of high load is not
particularly helpful without stopping rendering from the queue.
In addition to Render and RenderPrio, add another priority level of RenderLow.
The idea is that if you rerender all tiles by touching planet-import-complete and
thereby likely overloading the server's rendering capacity you want to prioritize rerendering
of tiles that were explicitly marked dirty due to data changes over rerendering
due to planet-import-complete updates.
This is achieved by splitting rendering requests by if they are "old", or "very old".
As the tile expiry sets back the modification date many years, mod_tile splits
rendering requests based on how old the tiles are. If they are no more than a
certain threshold (currently set to one year) old, they are rendered with lower priority.
