Re: GDK_mmap_minsize again

As far as I understand it, malloc on Linux will happily succeed even if there is not enough memory+swap to hold all data. So you can't rely on malloc failures to tell you to switch to mmap.

On 09/20/2016 06:19 PM, Hannes Mühleisen wrote:

Hello list,

we were wondering about the purpose of GDK_mmap_minsize when creating transient columns. The attached patch will always *try* to malloc/realloc a transient column but still fall back to memory-mapped files if malloc should fail. This dramatically improves performance. Any good reason why this should not be the default behaviour?

Thanks,

Mark and Hannes