What is the MALLOC_REALLOC VM area on iOS

After profiling my application with the tools, I noticed that the area MALLOC_REALLOC VM

ended up being almost 2 GB Persistent Bytes

. However, I'm using an iPod that doesn't have much memory, so I guess I'd be killed if I actually used that large memory.

I can't find any documentation on which area MALLOC_REALLOC

, and what it means.

Does anyone have a pointer to some helpful documentation on this?

thank

PS: examples of documentation links I've looked at and not helpful for answering this question

• Advanced memory management
• A tutorial for finding memory leaks on ios
• Find and fix memory leaks on ios
• Memory efficiency guidelines