OSM provides a split polygon file here, in case you're interested, to be
used when zoomed in:
http://openstreetmapdata.com/data/water-polygons

Cheers
Andrea

On Fri, Aug 10, 2018 at 6:24 PM Jody Garnett <jody.garn...@gmail.com> wrote:

> Yes, the ocean shape file is one I use when I teach performance
> optimization.
>
> option a) easy draw your map with background color the same as you would
> your ocean
>
> option b) make a whole world rectangle and draw it behind your other
> content
>
> option c) process the ocean - simplify for when you are zoomed out - and
> then process into smaller polygons for when you are zoomed in
>
> In this case process the data into smaller multi polygons
> --
> Jody Garnett
>
>
> On Thu, 9 Aug 2018 at 21:15, Tripple Tee <tripplete...@gmail.com> wrote:
>
>> Hi guys,
>>
>>
>>
>> I haven’t found the problem with my setup, but I found the shape file
>> that cause CPU drain, the natural-earth-ocean-shape file, without it I can
>> see the respond time is nearly instance
>>
>>
>>
>> On a similar topic, I have a layer made up by 1 sat image GeoTiff file 5G
>> in size, zoom and pan took 2s, by changing the Tile Caching setting, untick
>> the jpeg and png, and tick the png8 I can cut the zoom/pan time down to 1s
>> . Data transfer rate drop from 12MB to 2MB. And I cannot see any degrade in
>> image quality (not with my eyes anyway)
>>
>>
>>
>> The response time of the main server (proper Dell server) and the
>> portable server (Celeron SMB NAS) is now roughly on par
>>
>> Client to Main server via VPN route over public network
>>
>> Client to portable server via 1G ethernet LAN
>>
>>
>>
>> Cheers
>>
>>
>>
>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>>
>>
>>
>> *From: *Tripple Tee <tripplete...@gmail.com>
>> *Sent: *Friday, 10 August 2018 8:10 AM
>> *To: *Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi>;
>> geoserver-users@lists.sourceforge.net
>> *Subject: *RE: [Geoserver-users] CPU drain
>>
>>
>>
>> Thanks Jukka,
>>
>>
>>
>> Thanks for the link, I do think I have it wrong somewhere.
>>
>>
>>
>> The shape files I am using are indeed from NaturalEarth.
>>
>>
>> https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_land.zip
>> <https://www.naturalearthdata.com/http/www.naturalearthdata.com/download/10m/physical/ne_10m_land.zip>
>>
>>
>> https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_minor_islands.zip
>> <https://www.naturalearthdata.com/http/www.naturalearthdata.com/download/10m/physical/ne_10m_minor_islands.zip>
>>
>> or
>>
>>
>> https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/ne_10m_ocean.zip
>> <https://www.naturalearthdata.com/http/www.naturalearthdata.com/download/10m/physical/ne_10m_ocean.zip>
>>
>>
>>
>> Not sure if my Bounding box is correctly published. I press “Compute from
>> data”
>>
>> Native and Lat/Long bounding box are same
>>
>> MinX: -179.9999 MinY: -89.9999 MaxX: 180 MaxY: 83.6341
>>
>>
>>
>> This is what layer preview show
>>
>> [image: cid:image002.png@01D43081.9A110C70]
>>
>>
>>
>> Look like the earth was render twice
>>
>> Other setting while creating new layer is by default, the Coordinate
>> Refernece System: EPSG:4326
>>
>>
>>
>> Thanks
>>
>>
>>
>>
>>
>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>>
>>
>>
>> *From: *Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi>
>> *Sent: *Thursday, 9 August 2018 5:00 PM
>> *To: *Tripple Tee <tripplete...@gmail.com>;
>> geoserver-users@lists.sourceforge.net
>> *Subject: *Re: [Geoserver-users] CPU drain
>>
>>
>>
>> Hi,
>>
>>
>>
>> Before you start optimizing anything you should evaluate if the
>> performance that you have is normal. For example in this 11 years old
>> benchmark
>> https://www.idee.es/resources/presentaciones/JIDEE07/POWERPOINT_JIDEE2007/PowerPoint.7-Mapserver_vs._Geoserver.pdf
>> which was made with a computer that is today classified as a toy
>>
>> (Dual core (1.8Ghz per core).  2GB RAM.  7200RPM disk.  Linux.
>> PostgreSQL 8.2.4.  PostGIS 1.2)  shows much better performance.
>>
>>
>>
>> Shapefile of size 6 MB is really very small dataset. If it takes a second
>> to render it with  a powerful computer there must be something special in
>> the data or in your installation. I am sure that there are people on this
>> list who get better results with Raspberry Pi.
>>
>>
>>
>> Can you share your 6 MB dataset? Or could you repeat your tests with some
>> public data for example from http://www.naturalearthdata.com/downloads/?
>>
>>
>>
>> -Jukka Rahkonen-
>>
>>
>>
>>
>>
>> *Lähettäjä:* Tripple Tee [mailto:tripplete...@gmail.com]
>> *Lähetetty:* 9. elokuuta 2018 7:51
>> *Vastaanottaja:* geoserver-users@lists.sourceforge.net
>> *Aihe:* Re: [Geoserver-users] CPU drain
>>
>>
>>
>> Shape file is not doing well even on a powerful CPU. I have the same set
>> of data on a proper server with Xeon chip (Virtual Windows 2016 with 10
>> vCPU) the performance is a mark improvement compare with the poor Celeron.
>> The CPU usage jump to 15% every time I zoom in or pan, but it still take a
>> second to render.
>>
>>
>>
>> I did some googling on Java and multi core/thread CPU. Seem like Java and
>> most software can not take full advantage of the multi core/thread provided
>> by hardware.
>>
>>
>>
>> Thanks Brad for the info about PostGIS, I might have to stuck with shape
>> file and it lean, my design goal is portable:
>>
>> 1 geoserver on main server, when a team going away, all user need to do
>> is to robocopy the whole folder from the main server to the portable
>> server. Lucky GeoServer was written in Java so I can achieve this while
>> using different OS (main server is Windows 2016, portable server is Linux)
>>
>>
>>
>> Might be able to do this with PostGIS but I will have to copy the
>> database from Windows to Linux, but it will not be a simple process for
>> user.
>>
>>
>>
>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>>
>>
>>
>> *From: *br...@frogmouth.net
>> *Sent: *Thursday, 9 August 2018 11:43 AM
>> *To: *'Tripple Tee' <tripplete...@gmail.com>;
>> geoserver-users@lists.sourceforge.net
>> *Subject: *RE: [Geoserver-users] CPU drain
>>
>>
>>
>> There are a bunch of tips at
>> http://docs.geoserver.org/latest/en/user/production/index.html and you
>> need to benchmark (e.g. with jmeter) against your expected workload when
>> performance tuning.
>>
>>
>>
>> In general, shapefile is not going to be very high performance, as noted
>> at
>> http://docs.geoserver.org/latest/en/user/production/data.html#use-a-spatial-database
>>
>>
>>
>> Brad
>>
>>
>>
>> *From:* Tripple Tee <tripplete...@gmail.com>
>> *Sent:* Thursday, 9 August 2018 11:16 AM
>> *To:* geoserver-users@lists.sourceforge.net
>> *Subject:* [Geoserver-users] CPU drain
>>
>>
>>
>> Hi,
>>
>>
>>
>> Please give some pointer on optimising for better resource consumption
>>
>>
>>
>> I am running GeoServer on Linux with Intel Celeron 4-core processor,
>> which I know is slow
>>
>>
>>
>> When I open an individual layer (or layer group) of a region 200km each
>> way (with details like roads, buildings ...) the shape files size is under
>> 0.5MB it loads quite comfortably, effortless to zoom and pan.
>>
>>
>>
>> When I open a layer (or layer group) of the whole world with less detail
>> (only land and water lines) it seem to struggle. The size of the shape file
>> is around 5-7MB, I can see the CPU spike and it takes seconds to render as
>> I zoom in or pan the map. Note: I am preview this layer on the default
>> 750x400 resolution box. Should GeoServer only query data of the sub region
>> for that preview box ?
>>
>>
>>
>> 1 - Is this the expected performance ?
>>
>> 2 – How can I optimize it to stop the CPU spike and lag,
>>
>>
>>
>> Thanks
>>
>>
>>
>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
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>> Geoserver-users mailing list
>>
>> Please make sure you read the following two resources before posting to
>> this list:
>> - Earning your support instead of buying it, but Ian Turton:
>> http://www.ianturton.com/talks/foss4g.html#/
>> - The GeoServer user list posting guidelines:
>> http://geoserver.org/comm/userlist-guidelines.html
>>
>> If you want to request a feature or an improvement, also see this:
>> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
>>
>>
>> Geoserver-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>>
>
> ------------------------------------------------------------------------------
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> Please make sure you read the following two resources before posting to
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> - The GeoServer user list posting guidelines:
> http://geoserver.org/comm/userlist-guidelines.html
>
> If you want to request a feature or an improvement, also see this:
> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
>
>
> Geoserver-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>


-- 

Regards, Andrea Aime == GeoServer Professional Services from the experts!
Visit http://goo.gl/it488V for more information. == Ing. Andrea Aime
@geowolf Technical Lead GeoSolutions S.A.S. Via di Montramito 3/A 55054
Massarosa (LU) phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339
8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it
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Please make sure you read the following two resources before posting to this 
list:
- Earning your support instead of buying it, but Ian Turton: 
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- The GeoServer user list posting guidelines: 
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If you want to request a feature or an improvement, also see this: 
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer


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