Enhancing the queue is not meant neccesserily to make it longer.
Although I should've referred to the queueing process to be more clear.
As Andrew pointed out, a really long queue can cause latency issues in
regards to rendering so that's not such a good idea. There are at least
two ways to counteract the problem:
1. Instead of rejecting rendering requests due to a full queue,
implement a secondary queue which will feed the primary queue when it's
not too busy. If someone requests a re-render of a tile in the secondary
queue (and the primary queue is not full), the tile request is deleted
from the secondary queue.
2. Enhance the rendering process so the queue is processed quicker.
With regards,
Svavar Kjarrval
On 04/14/2011 03:37 PM, Ian Dees wrote:
How would you enhance the queue? Make it longer? How much longer?
On Thu, Apr 14, 2011 at 10:29 AM, Svavar Kjarrval <sva...@kjarrval.is
<mailto:sva...@kjarrval.is>> wrote:
Why is the queue not enhanced to avoid instances where
tile-rendering queries are rejected due to a full queue?
With regards,
Svavar Kjarrval
On 04/14/2011 03:15 PM, Peter Wendorff wrote:
Hi Nakor.
As far as I know the queue is the whole knowledge about tiles
which have to be rerendered.
If a tile has to be rerendered due to a changeset, that tile
is submitted to the queue exactly once, at the time the queue
management reads that changeset.
If the queue is full at that time, it's in fact not added -
and not added later, too.
An empty queue at night does not help if there is no call to
add your tile to the queue.
regards
Peter
Am 14.04.2011 16:52, schrieb Nakor:
Also from the graph it looks like the queue when
almost empty during the past 24 hours so why would
the tile not be rendered in that case?
Really? The queue has been full 18 hours a day or
more for the past two weeks.
Bob
Sorry I was not clear "The queue went almost empty (for
some time) during the past 24 hours" would have been more
correct.
That still leaves 6 hours where the queue is close to
empty as seen on the graph for today between 0:00 and 6:00
approximately. If there are tiles waiting to be rendered
why do not they get processed during that time?
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