[gdal-dev] Memory loss with RasterIO

[Even Rouault]

You're perhaps running into memory fragmentation issues if your buffer is too
big. And yes, GDAL maintains internally a block cache whose blocks are destroyed
when the dataset is closed. But by default (unless you explicitely set it to
another value), it is limited to 40 MB. But mixing small allocations and big
allocations can indeed lead to memory fragmentation issues, especially if you're
on a 32bit OS that has a limited address space.

Best regards,

Even