# 2025.40 Infrastructure Changes

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# Changes on Application environment [Copy link to this section](https://docs.unique.ai/it-operators/installing-and-upgrading-unique/release-notes-and-calendar/release-notes-2025/release-2025-40/2025-40-infrastructure-changes#changes-on-application-environment "Copy link to this section")

| **Change** | **Name** | **Default** | **Example** | **Required** | **Applications** | **Short Description** |
| --- | --- | --- | --- | --- | --- | --- |
| New | `FEATURE_FLAG_SAVE_MODEL_USAGE_UN_12832` | `false` | `true` | No | node-chat | Used to save model usage for public APIs. |
| New | `PDF_ENABLE_BATCH_PROCESSING_MODE` | true | true | No | ingestion-worker | Enables PDF ingestion analyze documents in batches. |
| New | `PDF_PAGES_PER_BATCH` | 100 | 100 | No | ingestion-worker | Specifies the number of PDF pages to process in each batch |

| **Author** | Solution Engineering |