Vulkan Memory Allocation Limits and VMA Sub-allocation Strategy

Vulkan implementations impose a strict limit on the total number of simultaneous memory allocations via maxMemoryAllocationCount. In environments where resource counts fluctuate or scale dynamically, relying on direct vkAllocateMemory calls risks exceeding this hardware-defined threshold, leading to driver instability.

The Vulkan Memory Allocator (VMA) addresses this by sub-allocating smaller resources from larger blocks. However, balancing the block size to minimize fragmentation while ensuring alignment requirements for diverse buffer and image types remains a critical configuration decision.

• How should the VMA pool configuration be tuned to prevent fragmentation when mixing high-frequency short-lived buffers with long-term static images?
• What is the recommended approach for verifying that the sub-allocation strategy remains within the maxMemoryAllocationCount across different GPU vendors?