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 for Windows 10
From: Tripple Tee
Sent: Friday, 10 August 2018 8:10 AM
To: Rahkonen Jukka (MML); 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_minor_islands.zip
or
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
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 for Windows 10
From: Rahkonen Jukka (MML)
Sent: Thursday, 9 August 2018 5:00 PM
To: Tripple Tee; 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 for Windows 10
From: br...@frogmouth.net
Sent: Thursday, 9 August 2018 11:43 AM
To: 'Tripple Tee'; 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 for Windows 10
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