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@@ -48,6 +48,10 @@ num_vectors * dimensions * 4 bytes * 1.5
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Quantization can reduce this estimate by a factor of 4 to 32, depending on the quantization method.
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<aside role="status">
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To get a more detailed sizing estimate, try the [Qdrant Sizing Calculator](https://sizing.qdrant.tech/estimate)
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</aside>
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On top of the vector data itself, budget for the HNSW index, which typically adds 20% to 30% overhead, along with payload indexes and the write-ahead log. Reserve about 20% headroom for optimizer operations and operating system cache.
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See [Quantization](/documentation/manage-data/quantization/) for the tradeoffs between quantization methods, and monitor actual memory usage before and after resizing (see [Monitor Collection Memory Usage](/documentation/ops-monitoring/memory-usage/)).
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