How does it works exactly? It's a memory pool that uses 85% of available memory? If I have one row in my DB it's going to prealocate 30GB of memory? I don't think it's a sane design, it reminds me the JVM args with min / max.
The OS doesn’t actually map/allocate the pages to you until you touch them, so if you preallocate 30 GB and only use one row, you’d only be using 4 KB (or whatever your page size is). This is the same as if you’d individually malloc’d the single row, since deep down malloc just calls mmap.
