> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# s3_upload_* 会话设置

> ClickHouse 在 s3_upload_* 生成组中的会话设置。

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>类型</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>默认值</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          无需重启即可更改
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

这些设置可在 [system.settings](/docs/zh/reference/system-tables/settings) 中查看，并根据 [源代码](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp) 自动生成。

<div id="s3_upload_part_size_multiply_factor">
  ## s3\_upload\_part\_size\_multiply\_factor
</div>

<SettingsInfoBlock type="UInt64" default_value="2" />

当单次写入 S3 上传的分片数达到 s3\_multiply\_parts\_count\_threshold 时，就将 s3\_min\_upload\_part\_size 乘以该因子。

<div id="s3_upload_part_size_multiply_parts_count_threshold">
  ## s3\_upload\_part\_size\_multiply\_parts\_count\_threshold
</div>

<SettingsInfoBlock type="UInt64" default_value="500" />

每当上传到 S3 的分片数达到该值时，s3\_min\_upload\_part\_size 都会乘以 s3\_upload\_part\_size\_multiply\_factor。