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What are the most common reasons vector search accuracy drops over time and how do I fix them in my personal knowledge base?

ChatGPTgpt-61 query11/1/2026
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The searches the AI actually ran for this prompt.

SEED QUERY
What are the most common reasons vector search accuracy drops over time and how do I fix them in my personal knowledge base?
1 real search · 1 real-search pass
vector search retrieval quality degradation over time chunking duplicates stale embeddings metadata hybrid search reranking evaluation RAG best practicesGoogle ↗
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Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

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Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

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ChatGPT1 real searches · gpt-6
vector search retrieval quality degradation over time chunking duplicates stale embeddings metadata hybrid search reranking evaluation RAG best practices Google ↗

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Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
vector search retrieval quality degradation over time chunking duplicates stale embeddings metadata hybrid search reranking evaluation RAG best practices
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