I have a large set of imagery that I created a mosaic from in ArcMap 10.1. I want to use GDAL to create the overviews because arcmap has issues building the pyramids and never seems to complete. I have experimented with using the GDAL command line utilities specifically:
gdaladdo image.png 2 4
The image alone is about 4gb. When creating the overviews using the above command, it generated and overview file over 60 gb in size.
What levels should I include in the command to mimic what ArcMap would create by default?
gdaladdo -ro --config COMPRESS_OVERVIEW DEFLATE
But you make a major mistake by creating a 4 GB mosaic in png format. Create tiled GeoTIFF instead using DEFLATE compression or JPEG compression if you have satellite or aerial images and you do not need lossless quality.