Update docs

Author: g-despot

_includes/code/howto/configure-rq/rq-compression-v4.py

@@ -101,6 +101,10 @@
         quantizer=Configure.VectorIndex.Quantizer.rq(
             bits=8,  # Optional: Number of bits
             rescore_limit=20,  # Optional: Number of candidates to fetch before rescoring
+            cache=True,  # Optional: Enable caching for flat index (enabled by default for for HNSW)
+        ),
+        vector_index_config=Configure.VectorIndex.flat(
+            vector_cache_max_objects=100000,  # Optional: Maximum number of objects in the memory cache
         ),
         # highlight-end
     ),

_includes/configuration/rq-compression-parameters.mdx

@@ -1,4 +1,6 @@
-| Parameter            | Type    | Default | Details                                                                                                                                                                                                                      |
-| :------------------- | :------ | :------ | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `rq`: `bits`         | integer | `8`     | The number of bits used to quantize each data point. Value can be `8` or `1`. <br/> <br/>Learn more about [8-bit](/weaviate/concepts/vector-quantization#8-bit-rq) and [1-bit](/weaviate/concepts/vector-quantization#1-bit-rq) RQ. |
-| `rq`: `rescoreLimit` | integer | `-1`    | The minimum number of candidates to fetch before rescoring.                                                                                                                                                                  |
+| Parameter               | Type    | Default | Details                                                                                                                                                                                                                                                                     |
+| :---------------------- | :------ | :------ | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `rq`: `bits`            | integer | `8`     | The number of bits used to quantize each data point. Value can be `8` or `1`. <br/> <br/>Learn more about [8-bit](/weaviate/concepts/vector-quantization#8-bit-rq) and [1-bit](/weaviate/concepts/vector-quantization#1-bit-rq) RQ.                                         |
+| `rq`: `rescoreLimit`    | integer | `-1`    | The minimum number of candidates to fetch before rescoring.                                                                                                                                                                                                                 |
+| `rq` : `cache`          | boolean | `false` | Whether to use the vector cache.<br/> (only when using the `flat` vector index type)                                                                                                                                                                                        |
+| `vectorCacheMaxObjects` | integer | `1e12`  | Maximum number of objects in the memory cache. By default, this limit is set to one trillion (`1e12`) objects when a new collection is created. For sizing recommendations, see [Vector cache considerations](/weaviate/concepts/vector-index#vector-cache-considerations). |