Release 2.4 | SurrealDB

2.4.0

Released on Nov 24, 2025

Features:

Added CONTAINS/INSIDE planning consistent with substring semantics; use indexes only for flattened or set-based operators
Made WebSocket limits configurable
Added 32-bit floats by default for HNSW vector indexes
Exposed and tune RocksDB BlobDB options via environment variables
Aligned RocksDB blob defaults with upstream and make blob compression optional
Added configurable slow-query logging with parameter allow/deny filtering and normalised single-line output
Added disk space limits and read-only/deletion-only modes for RocksDB
Added notification caller when a connection is dropped
Added COUNT Index Support with Compaction System and Enable Concurrent Index Building for WASM
Added minimal implementation for 2.0 → 3.0 migration tool
Ensured reverse scan is used only with compatible datastore

Bug fixes:

Fixed SELECT with SPLIT so ORDER BY and START/LIMIT apply after splitting
Fixed OOM crash in COUNT index on large datasets by batching key retrieval
Fixed insert ignore with unique index still creates a record when index violated

Breaking changes:

CONTAINS/INSIDE planning made consistent with substring semantics - see language test example in this file with details on using the CONTAINSANY operator with indexes

Upgrade or install

Get SurrealDB v2.4.0

Pick how you want to install or upgrade. Surrealist can update connected instances in place, or choose a platform below to copy a CLI command for v2.4.0.

You can upgrade your SurrealDB Cloud instance to v2.4.0 effortlessly through the Surrealist app.

Open the Surrealist app
Select your organisation and instance
On the dashboard, click on the "Upgrade" button
Your instance will be updated and restarted automatically

Full install guide

Our newsletter

Get tutorials, AI agent recipes, webinars, and early product updates in your inbox every two weeks

Newer release line

2.5

Updated Jan 22, 2026

Older release line

2.3

Updated Sep 19, 2025

All releases