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Version 1.39.12 Improves Startup Performance with Reindex Vector Dimensions

Version 1.39.12 includes a fix to prevent dropping live classes that differ only by case.

12 Oct 20261 verified claims1 sources1 observations
What happened

The official source reports this update: v1.39.12 - Schema drop and recreate class Fix, Reindex vector dimensions at startup performance improvement. Breaking Changes none New Features none Fixes queue: fix flaky tests that race the running scheduler by @asdine in #13504 test(concurrency): count only the goroutines a budget test starts by @aliszka in #13497 Update golang.org/x/net to fix CVE-2026-78663 etc by @dirkkul in #13509 perf: improve reindex vector dimensions at startup by @antas-marcin in #13190 fix(schema): never drop a live class that differs from an orphan only by case by @moogacs in #13513 Full Changelog : v1.39.11...v1.39.12

Why it matters

This official update documents a development concerning v1.39.12 - Schema drop and recreate class Fix, Reindex vector dimensions at startup performance improvement. Its practical significance depends on the scope and evidence stated by the source.

What to watch next

Read the official source update and verify its stated scope, evidence and timing before acting on it.

Connected knowledge

Entities affected by this event

Weaviatesubject
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infrastructureWeaviate 1.40.0 adds user isolation with namespaces.7 Oct 2026infrastructureParquet export row groups now limited to 32 MiB in v1.38.196 Oct 2026infrastructureLSM store performance improved by segment replay in v1.39.95 Oct 2026infrastructureWeaviate 1.39.8: Multi-tenant collections now pass tenant to re-vectorize check on PATCH1 Oct 2026infrastructureWeaviate 1.38.18: Multi-tenant collections now pass tenant to re-vectorize check on PATCH.1 Oct 2026infrastructureRAFT boot-time race fixed in v1.39.725 Sept 2026
Evidence trail

Sources behind the event

Weaviate official releasesv1.39.12 - Schema drop and recreate class Fix, Reindex vector dimensions at startup performance improvement
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