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If you extend a relation, it should count as a block written, not read (we write a zero-filled block). If you ask for a zero-filled buffer, it shouldn't be counted as read or written. Later we might consider counting zero-filled buffers with a separate counter, if they become more common due to future work. Author: Thomas Munro Reviewed-by: Haribabu Kommi, Kyotaro Horiguchi, David Rowley Discussion: https://postgr.es/m/CAEepm%3D3JytB3KPpvSwXzkY%2Bdwc5zC8P8Lk7Nedkoci81_0E9rA%40mail.gmail.com |
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