[GRASS-dev] [GRASS GIS] #2356: r.stream.basisns uses more memory than given in memory option

[GRASS GIS]

#2356: r.stream.basisns uses more memory than given in memory option
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 Reporter:  sbl                      |       Owner:  grass-dev@…              
     Type:  defect                   |      Status:  new                      
 Priority:  normal                   |   Milestone:  7.1.0                    
Component:  Addons                   |     Version:  svn-trunk                
 Keywords:  r.stream.basins, memory  |    Platform:  Linux                    
      Cpu:  x86-64                   |  
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Comment(by hamish):

 so for an unsegmented cell map, 180752 *  141312 * 4 bytes = ~97GB to hold
 one whole map in ram.

 r.stream.basins/io.h defines segments as 256x256, so for memory=10000 (mb)
 {{{
   seg_create_map(&map_dirs, SROWS, SCOLS, number_of_segs, CELL_TYPE);
 }}}

 we get
  bytes = ~20.8GB, and needs that for each of the two or three open maps.


 can you try r61149?


 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2356#comment:6>
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