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@@ -1,3 +1,47 @@
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+# 2.3.0
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+
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+### Features:
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+- **Change:** The video relevance score formula has been updated. Now `Video.publishedBeforeJoystream` can be taken into account when calculating the value of the `newness` parameter. The new formula for `newness` is:
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+ ```
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+ -(dsPOJ * jcw + dsPBJ * ycw) / (jcw + ycw)
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+
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+ Where:
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+ dsPOJ - days since published on Joystream (Video.createdAt)
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+ jcw - joystream creation weight
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+ dsPBJ - days since published before Joystream (Video.publishedBeforeJoystream)
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+ ycw - YouTube creation weight
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+ ```
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+
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+### Config values:
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+- **Change:** `RELEVANCE_WEIGHTS` config value now has a new format:
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+ ```diff
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+ [
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+ 1, # newness weight,
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+ 0.03, # views weight
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+ 0.3, # comments weight
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+ 0.5, # reactions weight
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+ + [7,3] # [joystream creation weight, YouTube creation weight]
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+ ]
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+ ```
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+ If the value of `[joystream creation weight, YouTube creation weight]` is not provided, it is set to `[7,3]` by default.
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+
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+### Schema/API changes:
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+- **Change:** `setVideoWeights` operator mutation now accepts 2 new arguments: `joysteamTimestampSubWeight` and `ytTimestampSubWeight`
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+
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+### Mappings:
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+- `videoRelevanceManager` is now used in `processVideoCreatedEvent` to calculate `videoRelevance` (to avoid code duplication)
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+
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+### DB Optimalizations:
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+- Changes in `postgres.conf` to improve query execution time in current production deployments:
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+ - Turn off JIT compilation which was usually uneffective
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+ - Lower `random_page_cost` to `1.0`, as the database still fits into the memory
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+ - Increase `shared_buffers` to `2GB`
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+- New indexes added to `db/migrations/2100000000000-Indexes.js` (`auction_type`, `member_metadata_avatar`, `owned_nft_auction`)
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+
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+### Fixes:
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+- `scripts/generate-schema-file.sh` has been made executable w/o bash to avoid error during docker build
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+- The issue w/ _Offchain State_ not being imported if the `export.json` contained empty `update` tables (an error was thrown in this case) has been fixed
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+
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# 2.2.0
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### Features:
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Leszek Wiesner