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ReinDB

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ReinDB is read-only performance monitoring for PostgreSQL, MySQL, SQL Server and Oracle, self-managed or on Amazon RDS and Aurora. It learns what normal looks like for every database and statement, hour by hour, and flags what drifts from it, ranked by the extra database time each change costs. Every flag comes with the evidence behind it, including plan history, and with a fix script your DBA can test, with an undo for each step. Pre-check reviews a query, procedure or DDL change before it ships and returns Pass, Review or Risky. Ask answers plain-English questions with charts built from the measurements. ReinDB never changes your database and installs nothing in it. It needs one read-only login per database, and on Oracle it needs no Diagnostics or Tuning Pack. Run it hosted, onsite on Linux or Windows, or in your own AWS or Google Cloud account. Your first database is free for one person, with no time limit and no card.

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