[Geotools-devel] [ geotools-Support Requests-476009 ] Memory Consumption

[<no...@so...>]

Support Requests item #476009, was opened at 2001-10-29 06:42
You can respond by visiting: 
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Joachim Bröckl (saltag)
Assigned to: Nobody/Anonymous (nobody)
Summary: Memory Consumption

Initial Comment:
Hi,

I have a .shp-file of 4.2 megabyte. Reading it with sf 
= ShapefileReader(myURL) consumes 17.5 megabyte of 
RAM, creating a layer object with sf.getLayer() 
dissipates another 32 MBytes. Adding a couple of other 
layers from other shape-files to my map soonly raises 
a OutOfMemoryException.
Is there a way to reduce the memory consumption when 
creating layers?

Thanks
Joachim


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>Comment By: James Macgill (jmacgill)
Date: 2001-12-03 07:10

Message:
Logged In: YES 
user_id=9731

Sorry, I made the changes to GeoPoint localy, and completly 
failed to commit them into the main repository.

So it's little wonder you saw no difference.

Could you try again please?

btw, the sugestion to nullify your shapefileReader is a 
good one, and should free up a bit of memmory.

James

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Comment By: James Macgill (jmacgill)
Date: 2001-12-03 07:10

Message:
Logged In: YES 
user_id=9731

Sorry, I made the changes to GeoPoint localy, and completly 
failed to commit them into the main repository.

So it's little wonder you saw no difference.

Could you try again please?

btw, the sugestion to nullify your shapefileReader is a 
good one, and should free up a bit of memmory.

James

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Comment By: Nobody/Anonymous (nobody)
Date: 2001-12-03 05:57

Message:
Logged In: NO 

Did you try nullifying the shapefileReader object after 
calling sf.getLayer() ?
You shouldn't need the reader anymore at that point, if I 
recall correctly

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Comment By: Joachim Bröckl (saltag)
Date: 2001-12-03 05:44

Message:
Logged In: YES 
user_id=362103

I downloaded the latest nightly build today and tested it 
with my huge shapefile. Unfortunately I could not see any 
significant changes in memory consumption; the java-process 
now displays 45828 KBytes instead of 46844 KBytes of 
consumed memory in the task manager (I probably should look 
for that JProbe instead?!).
Nevertheless thanks for your efforts.
Joachim

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Comment By: James Macgill (jmacgill)
Date: 2001-11-30 05:32

Message:
Logged In: YES 
user_id=9731

I have just been testing JProbe, a profiling tool which 
allows me to analyse where most of the memmory is going.

I've knocked out about 16% of typical memory usage by 
changing the devenition of GeoPoints.

This has helped quite a bit, but I can still see a lot of 
other areas that might help reduce the load further.

Could you grab the latest nightly build from
http://www.geotools.org/dload.php

and let me know if you notice any significant difference?

James

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