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Retrieval & EmbeddingsMedium· Memory Estimation· Vector Databases
How much memory does a 10-million-chunk index at 768 di...
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See plansA strong answer refuses to provide a single number without knowing the index type, precision, and whether the payload is resident. It builds the estimate per vector: 3,072 bytes of float32, plus 260 bytes of HNSW links at M=32, plus 8 bytes for an ID in the IVF case, multiplied by N, plus fixed centroids and rebuild/replica overhead. A weak answer simply calculates 10M * 768 * 4 bytes, which fails to account for the structural overhead that leads to OOM errors.