Title: Changelog: Infrastructure · WordPress VIP Documentation --- 1. [Changelog](https://docs.wpvip.com/changelog/) 2. Infrastructure # Changelog: Infrastructure Updates made to the functionality and behavior of the platform’s [VIP File System](https://docs.wpvip.com/vip-file-system/), [caching layers](https://docs.wpvip.com/caching/), and other underlying architecture and software. [ RSS  ](https://docs.wpvip.com/changelog/infrastructure/feed/) Search Showing page 1 of 1 09 April 2026 08:55:19 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/added-sccid-to-filtered-query-parameters/) ## Added ScCid to filtered query parameters The `ScCid` query parameter has been added to the list of [query parameter values that are filtered by the page cache](https://docs.wpvip.com/caching/page-cache/query-parameter-caching/#h-filtered-query-parameters) and therefore not cached as variants.  09 January 2026 19:23:47 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/update-to-filtered-query-parameters/) ## Update to filtered query parameters The `ttclid` query parameter has been added to the list of [query parameter values that are filtered by the page cache](https://docs.wpvip.com/caching/page-cache/query-parameter-caching/#h-filtered-query-parameters) and therefore not cached as variants.  03 December 2025 09:26:07 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/node-js-production-environments-transitioned-to-valkey/) ## Node.js production environments transitioned to Valkey All Node.js production environments, with the[ optional Redis add-on](https://docs.wpvip.com/node-js/integrating-redis/) enabled, have been switched to[ Valkey](https://valkey.io/topics/introduction/)  as their in-memory data store. ### Updated * The in-memory data store for Node.js production is now Valkey as publicly announced in our [lobby](https://lobby.vip.wordpress.com/2025/11/04/transition-from-redis-to-valkey/). 18 November 2025 21:17:50 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/instrumentation-changes-for-new-relic/) ## Instrumentation changes for New Relic We’ve rolled out instrumentation changes for New Relic. Due to the nature of the rollout, it may have caused a temporary increase in sampling percentage on November 18, 2025, between 20:20 and 20:32 UTC. Now, to troubleshoot problematic requests, a new query argument can be used: `?vip-force-trace=1`. This will force a specific request to be traced and not be subject to the sampling. 04 November 2025 11:50:24 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/new-mobile_class-field-added-to-http-request-logs/) ## New mobile_class field added to HTTP request logs The [contents of HTTP request log files](https://docs.wpvip.com/logs/log-shipping/log-contents/) that are shipped by the [HTTP request Log Shipping](https://docs.wpvip.com/logs/log-shipping/) feature will now include a `mobile_class` field. Its value contains the `X-Mobile- Class` [header value](https://docs.wpvip.com/caching/page-cache/cache-api/#h-vary-cached-content-by-user-agent-class) populated by the VIP edge based on the request `User-Agent` header. 30 October 2025 23:51:31 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/vip-file-system-performance-improvements/) ## VIP File System performance improvements We have improved the performance speeds of VIP File System `PUT` and `DELETE` requests. Uploads are now up to 5X faster and delete operations are up to 4X faster. In addition, new global helper functions were added to [`a8c-files.php` in VIP MU plugins](https://github.com/Automattic/vip-go-mu-plugins/blob/a592835d08915830151e32b7e1369750ad9789a2/a8c-files.php):` wpvip_fs_local_file_add`, `wpvip_fs_local_file_remove`, and `wpvip_fs_local_file_list`. These helper functions can be used by WordPress applications to mark files to be handled by the [PHP stream wrapper](https://docs.wpvip.com/vip-file-system/media-uploads/#PHP-Stream-Wrapper) in the local temporary directory rather than being uploaded to the VIP File System. 21 October 2025 20:30:47 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/cache-personalized-responses-now-respect-max-age-values-set-at-origin/) ## Cache personalized responses now respect `max-age` values set at origin Applications that leverage [the cache personalization API](https://docs.wpvip.com/caching/page-cache/the-vip-cache-personalization-api/) can now specify a `max-age` value in the `Cache-Control` header returned by origins. This value will be honored by the VIP edge, which will return a `Cache-Control` header with the `private` directive, to make sure only private caches can store the response, and the `max-age` directive containing the value set at origin. ### Changed `Cache-Control` headers for responses that leverage cache personalization now include the `max-age` value sent from origin, if available, instead of only specifying ` private`. 20 October 2025 21:00:53 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/new-cache_segment-field-added-to-http-request-logs/) ## New cache_segment field added to HTTP request logs The [contents of HTTP request log files](https://docs.wpvip.com/logs/log-shipping/log-contents/) that are shipped by the [HTTP request Log Shipping](https://docs.wpvip.com/logs/log-shipping/) feature will now include a `cache_segment` field. For applications leveraging the [VIP Cache Personalization API](https://docs.wpvip.com/caching/page-cache/the-vip-cache-personalization-api/) the value of the `cache_segment` field is populated by the value of the `vip-go- seg` cookie and will otherwise be blank. 07 October 2025 13:03:00 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/redis-updated-to-version-6-2-20/) ## Redis updated to version 6.2.20 Redis has been updated to version 6.2.20 throughout the VIP Platform in response to [CVE-2025-49844](https://nvd.nist.gov/vuln/detail/CVE-2025-49844#range-17157733). 01 October 2025 12:58:29 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/lossy-compression-for-lossless-images/) ## Lossy compression for lossless images ### Changed When requesting a lossless image from the [VIP File System](https://docs.wpvip.com/vip-file-system/) and specifying a quality value lower than 100, the image is now returned compressed in a lossy manner, instead of ignoring the quality request. ### Added The `allow_lossy=1` query parameter has been added to opt-in to lossy compression for lossless images without having to specify a quality value. The VIP File System will tune compression based on the image and context. 26 November 2024 20:38:34 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/mu-plugins-code-freeze/) ## MU-Plugins Code Freeze As we approach the end of the year, we will be implementing a **code freeze** for [MU-plugins](https://github.com/Automattic/vip-go-mu-plugins) on the VIP platform during the dates outlined below. During this period, no code deployments will be made unless they address critical security issues. * **Start Date:** Tuesday, December 17, 2024 * **End Date:** Tuesday, January 7, 2025 Happy Holidays! 29 November 2023 21:05:00 GMT+0000 [ Infrastructure ](https://docs.wpvip.com/changelog/infrastructure/) [ Permalink ](https://docs.wpvip.com/changelog/infrastructure/holiday-release-schedule-notice-dec-13-to-jan-8/) ## Holiday Release Schedule Notice: Dec 13 to Jan 8 As the holiday season approaches, we want to ensure everyone has the chance to relax and enjoy this special time with their loved ones. Therefore, there won’t be any scheduled [MU-Plugins](https://github.com/Automattic/vip-go-mu-plugins/) releases from **December 13th to January 8th**. During this period, no new feature or maintenance code will be pushed to the [production branch](https://docs.wpvip.com/technical-references/vip-go-mu-plugins/branches-and-updates/#0-production-branch) on MU-plugins. As always, should the need arise, be it a security mitigation or other critical time-sensitive fix, we will deploy those. We wish you all a wonderful holiday break!