question about std alloc

I can't seem to find any details about the std::alloc (the one that is the default memory manager for containers). Is just a wrapper for new/delete? Is it using a memory pool?
I know this is google's first pick but it doesn't answer any of my questions.
I'm not asking about making my own custom version of the allocator, I'm asking about the properties of the ones provided in stl.
The standard (default) allocator used by all of the STL containers etc is simply a wrapper for new and delete.
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