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The Silent Recall Drop: pgvector HNSW Under Concurrent Writes

This story is from 2026-10-18. It is preserved in the archive; the latest stories are on the live feed.

The Silent Recall Drop: pgvector HNSW Under Concurrent Writes 02:11:47 WARN ingest p99_insert_ms=3412 rows=48000 workers=6 02:11:47 WARN lockwait relation=job_chunks_hnsw held=2980ms 02:12:03 INFO eval recall@10=0.52 baseline=0.91 Two regressions in the same window, and only one of them was the ind…

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  1. 2026-10-18 20:22 · DEV Community — AI
    The Silent Recall Drop: pgvector HNSW Under Concurrent Writes

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