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## Problem After enabling LFC in tests and lowering `shared_buffers` we started having more problems with `test_pg_regress`. ## Summary of changes Set `shared_buffers` to 1MB to both exercise getPage requests/LFC, and still have enough room for Postgres to operate. Everything smaller might be not enough for Postgres under load, and can cause errors like 'no unpinned buffers available'. See Konstantin's comment [1] as well. Fixes #9956 [1]: https://github.com/neondatabase/neon/issues/9956#issuecomment-2511608097