Troubleshoot vector indexes in the columnar engine

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This document describes commands for diagnosing and troubleshooting columnar engine index operations. Vector indexes use the Approximate Nearest Neighbor (ANN) search strategy that enhances performance and requires a balance between query latency and recall. For more information, see Choose a vector index in AlloyDB AI.

Ensure index integrity

To verify that an index in the columnar engine is consistent and doesn't have any corruption or errors, especially when you experience issues related to index performance or data retrieval, use the following SQL command:

  SELECT google_columnar_engine_verify(index => 'INDEX_NAME');

Replace INDEX_NAME with the name of the index.

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