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        <title>快照直方图是 Gauge，不是 Counter</title>
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        <pubDate>Sat, 11 Jul 2026 22:06:29 +0800</pubDate>
        
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        <description>已随 v1.4.0 发布。PG Exporter 在每次真实查询时重建 SQL 分布，并用 Gauge 暴露累计 bucket、count 与 sum，不把当前总体伪装成单调 Counter。</description>
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