Enhancing Postgres Performance with Row-Level Security
Tips for resolving performance issues in Postgres using Row-Level Security (RLS).
In Postgres, Row-Level Security (RLS) determines which rows users can access and modify. RLS policies are attached to tables and evaluated upon access. A poorly designed RLS policy can significantly degrade performance. In a recent case, rewriting an RLS policy reduced CPU usage from 80% to 16%. Additionally, it was highlighted that EXPLAIN commands may yield misleading results if not run under the correct security context.
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