Hi Matt,
I have not noticed any runtime slow down when using larger queues with
LDM. I have queues of 8GB and 12GB and have not had any problems with
them.
The only time I have noticed an effect from the larger queues is when
stopping LDM.
I'm not 100% sure but as if I understand correctly; when running, the queue
is all kept in RAM, so IO is not typically an issue, but if you stop it
flushes to disk, and that can take some time with larger queues and
sometimes it goes awry.
So, if you are stopping and starting a lot, it could have an impact.
I've also talked with other LDM users about running multiple instances of
LDM with discrete queues, but I have never actually done it myself.
On Fri, Feb 3, 2017 at 7:59 AM, Matthew Foster - NOAA Federal <
matthew.foster@xxxxxxxx> wrote:
> I have heard that a very large product queue can start incurring so much
> overhead to maintain that it can slow LDM down noticeably. I have not,
> however, found anything in writing saying as much via Google searches.
>
> We're in a situation where our 4GB PQ is dropping down to a max age of
> around 5 minutes at times. We're trying to decide if we just keep
> increasing the size of the queue or look for other solutions.
>
> We welcome any input!
>
> Matt
>
>
> --
> Matt Foster
> Techniques Development Meteorologist
> NWS Central Region Headquarters, Scientific Services Division / STI
> Kansas City, MO
> Office: 816-268-3113
>
>
> _______________________________________________
> NOTE: All exchanges posted to Unidata maintained email lists are
> recorded in the Unidata inquiry tracking system and made publicly
> available through the web. Users who post to any of the lists we
> maintain are reminded to remove any personal information that they
> do not want to be made public.
>
>
> ldm-users mailing list
> ldm-users@xxxxxxxxxxxxxxxx
> For list information or to unsubscribe, visit:
> http://www.unidata.ucar.edu/mailing_lists/
>
--
“The presence of those seeking the truth is infinitely to be preferred to
the presence of those who think they’ve found it."
-- Terry Prachett
-------------------------------------------
Karen.Cooper@xxxxxxxx
Phone#: 405-325-6456
Cell: 405-834-8559
National Severe Storms Laboratory
