Experimental reduce indexing memory usage

text/0034-telemetry-policies.md

@@ -98,7 +98,8 @@ The collected data is sent to [Segment](https://segment.com/). Segment is a plat
 | `infos.ssl_resumption` | `true` if `--ssl-resumption`/`MEILI_SSL_RESUMPTION` is specified, otherwise `false` | false | Every Hour |
 | `infos.ssl_tickets` | `true` if `--ssl-tickets`/`MEILI_SSL_TICKETS` is specified, otherwise `false` | false | Every Hour |
 | `infos.with_configuration_file`         | `true` if the instance is launched with a configuration file, otherwise `false` | false | Every Hour |
-| `infos.experimental_enable_metrics` | `true` if  `--experimental-enable-metrics`/`MEILI_EXPERIMENTAL_ENABLE_METRICS` is specified at launch, otherwise `false` | `false` | Every Hour |
+| `infos.experimental_enable_metrics`     | `true` if  `--experimental-enable-metrics`/`MEILI_EXPERIMENTAL_ENABLE_METRICS` is specified at launch, otherwise `false` | `false` | Every Hour |
+| `infos.experimental_reduce_indexing_memory_usage`     | `true` if  `--experimental-reduce-indexing-memory-usage`/`MEILI_EXPERIMENTAL_REDUCE_INDEXING_MEMORY_USAGE` is specified at launch, otherwise `false` | `false` | Every Hour |
 | `system.distribution`                   | Distribution on which MeiliSearch is launched           | Arch Linux        | Every hour |
 | `system.kernel_version`                 | Kernel version on which MeiliSearch is launched         | 5.14.10           | Every hour |
 | `system.cores`                          | Number of cores                                         | 24                | Every hour |

text/0119-instance-options.md

@@ -118,6 +118,7 @@ The expected behavior of each flag is described in the list above.
 - [SSL tickets](#3325-ssl-tickets)
 - [Config file path](#3326-config-file-path)
 - [Experimental enable Metrics](#3327-experimental-enable-metrics)
+- [Experimental reduce indexing memory usage](#3328-experimental-reduce-indexing-memory-usage)
 
 #### 3.3.1. Database path
 
@@ -487,6 +488,16 @@ See [Configuration File](0185-configuration-file.md) specification details.
 
 Activate the `/metrics` endpoint to collect Meilisearch metrics for monitoring purposes. See [0174-metrics-api.md](0174-metrics-api.md).
 
+#### 3.3.28. Experimental Reduce Indexing Memory Usage
+
+**Environment variable**: `MEILI_EXPERIMENTAL_REDUCE_INDEXING_MEMORY_USAGE`
+**CLI option**: `--experimental-reduce-indexing-memory-usage`
+**Default**: Disabled
+
+⚠️ This command-line option does not take any values. Assigning a value will throw an error.
+
+Enables the `MDB_WRITEMAP` option of LMDB, making the internal key-value store use much less RAM than usual.
+
 ## 4. Technical Aspects
 
 N/A