Dear David,
I would take a different path and understand more about this "large
rasters":

- tell us more about format and size
- tell us more about how you preprocessed them for performance

The first step with serving (large) raster data is choosing the right
format then preprocessing, see here (slide 8 and onward):
https://www.slideshare.net/geosolutions/geoserver-in-production-we-do-it-here-is-how-foss4g-2016
<https://gnldr.online/tracker/click?redirect=https%3A%2F%2Fwww.slideshare.net%2Fgeosolutions%2Fgeoserver-in-production-we-do-it-here-is-how-foss4g-2016&dID=1573475791127&linkName=https://www.slideshare.net/geosolutions/geoserver-in-production-we-do-it-here-is-how-foss4g-2016>
Everything else comes (way) afterwards.

Regards,
Simone Giannecchini
==
GeoServer Professional Services from the experts!
Visit http://bit.ly/gs-services
<https://gnldr.online/tracker/click?redirect=http%3A%2F%2Fbit.ly%2Fgs-services&dID=1573475791127&linkName=http://bit.ly/gs-services>
for more information.
==
Ing. Simone Giannecchini
@simogeo
Founder/Director

GeoSolutions S.A.S.
Via di Montramito 3/A
55054  Massarosa (LU)
Italy
phone: +39 0584 962313
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On Sun, Nov 10, 2019 at 3:47 AM David I <persso...@gmail.com> wrote:

> Hi,
>
> We're currently running 2.11.5 (upgrade of the whole server scheduled for
> early next year) and are experiencing stability issues with the Jetty 9.3
> hosting Geoserver (and a Geoexplorer). For instance large ortho rasters
> previewed in Geoserver try to render for a long time and eventually fail
> and
> if several of those heavy getMaps happen in parallell Jetty becomes slow to
> respond and will either end up in state where it doesn't appear to recover,
> at least for 10 minutes, or it recovers. Lesser rasters preview ok and do
> not cause
>
> (This is a problem when using these WMS layers in desktop applications,
> it's
> not that lots of people preview them from Geoserver's /web)
>
>
> Latest Jetty 9.3, latest Corretto JRE 8.
>
> Java options:
> Marlin 0.9.4.1,
> -XX:+UseParallelGC
> -XX:SoftRefLRUPolicyMSPerMB=36000
>
> 6144MB initial heap and 8192 max, thread stack size 256KB.
>
> When Jetty becomes partially or totally unresponsive the heap via jmapheap
> -heap looks like so:
>
> Heap Configuration:
>    MinHeapFreeRatio         = 0
>    MaxHeapFreeRatio         = 100
>    MaxHeapSize              = 8589934592 (8192.0MB)
>    NewSize                  = 2147483648 (2048.0MB)
>    MaxNewSize               = 2863136768 (2730.5MB)
>    OldSize                  = 4294967296 (4096.0MB)
>    NewRatio                 = 2
>    SurvivorRatio            = 8
>    MetaspaceSize            = 21807104 (20.796875MB)
>    CompressedClassSpaceSize = 1073741824 (1024.0MB)
>    MaxMetaspaceSize         = 17592186044415 MB
>    G1HeapRegionSize         = 0 (0.0MB)
>
> Heap Usage:
> PS Young Generation
> Eden Space:
>    capacity = 1982332928 (1890.5MB)
>    used     = 1982332928 (1890.5MB)
>    free     = 0 (0.0MB)
>    100.0% used
> From Space:
>    capacity = 437256192 (417.0MB)
>    used     = 0 (0.0MB)
>    free     = 437256192 (417.0MB)
>    0.0% used
> To Space:
>    capacity = 439353344 (419.0MB)
>    used     = 0 (0.0MB)
>    free     = 439353344 (419.0MB)
>    0.0% used
> PS Old Generation
>    capacity = 5726797824 (5461.5MB)
>    used     = 5726435656 (5461.154609680176MB)
>    free     = 362168 (0.34539031982421875MB)
>    99.99367590735469% used
>
> In addition Geoserver doesn't appear to adhere to the max rendering time
> under WMS settings:  35s, this is what the Monitor plugin captured shortly
> before Jetty stopped responding earlier today:
>
>
> /<Request id="3,417,511">
>    <Operation>GetMap</Operation>
>    <Resources>ortofoto:orto_tatort2018</Resources>
>    <Path>/ows</Path>
>
>
> <QueryString>SERVICE=WMS&amp;VERSION=1.3.0&amp;REQUEST=GetMap&amp;LAYERS=ortofoto:orto_tatort2018&amp;STYLES=&amp;CRS=EPSG:3010&amp;FORMAT=image/jpeg&amp;TRANSPARENT=TRUE&amp;WIDTH=502&amp;HEIGHT=502&amp;BBOX=6575000,141000,6579016,145016</QueryString>
>    <Body>
>
>    </Body>
>    <StartTime>2019-11-07T07:06:21.469Z</StartTime>
>    <EndTime>2019-11-07T07:13:26.694Z</EndTime>
>    <TotalTime>425,225</TotalTime>
>    <ResponseStatus>200</ResponseStatus>
>    <Failed>false</Failed>
> </Request> /
>
> Geoserver's (production9 or jetty (dev) log do not mention
> java.lang.outofmemoryerror, but Geoserver will sometimes reply with just
> that : heap space, when in its unresponsive state and a wfs getFeature is
> sent. (logging typically stops when the servlet becomes unresponsive).
>
> Would a different garbage collector be of use?
> Setting MaxPermSize?
> Somehow optimizing the tifs of the mosaic stores?
> Is there a way to not allow these WMS services to be used except with
> tiled=true -> their cached variants?
>
>
>
>
>
> --
> Sent from:
> http://osgeo-org.1560.x6.nabble.com/GeoServer-User-f3786390.html
>
>
> _______________________________________________
> 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
>
_______________________________________________
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


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