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Explore rasterio COG generation memory usage #158

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sgoodm opened this issue Jan 31, 2023 · 3 comments
Open

Explore rasterio COG generation memory usage #158

sgoodm opened this issue Jan 31, 2023 · 3 comments

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@sgoodm
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sgoodm commented Jan 31, 2023

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@sgoodm
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sgoodm commented Jan 31, 2023

COG generation seems to use significantly more memory than a traditional GeoTIFF when using Rasterio. I suspect this is either tied to the overlay creation, or the fact that we are often restructuring the raster blocks and have to read / write larger chunks than the final COG blocks (usually 512x512)

@jacobwhall
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I noticed significant memory usage (8Gb+) when processing a single VIIRS raster this morning. This will limit the number of concurrent COG exports we can run, even on the HPC.

@jacobwhall
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Just ran a more formal test and observed a VIIRS average mask COG exports using 12+ gigabytes of RAM. Similar result with and without LZW compression explicitly enabled in the **meta kwargs.

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@sgoodm @jacobwhall