> ## 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.

# iceberg_data_* セッション設定

> iceberg_data_* 生成グループの ClickHouse セッション設定。

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
  }}>型</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>デフォルト値</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          再起動せずに変更可能
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

これらの設定は [system.settings](/docs/ja/reference/system-tables/settings) で確認でき、[ソースコード](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp) から自動生成されています。

<div id="iceberg_data_file_size_lower_threshold_compaction">
  ## iceberg\_data\_file\_size\_lower\_threshold\_compaction
</div>

<SettingsInfoBlock type="UInt64" default_value="10485760" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.5"},{"label": "10485760"},{"label": "新しい設定"}]}]} />

Iceberg における compaction data files の下限しきい値。

<div id="iceberg_data_file_size_upper_threshold_compaction">
  ## iceberg\_data\_file\_size\_upper\_threshold\_compaction
</div>

<SettingsInfoBlock type="UInt64" default_value="10737418240" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.5"},{"label": "10737418240"},{"label": "新しい設定"}]}]} />

Iceberg の compaction data files に対するしきい値。