> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-postgresql-tls-support.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# jemalloc_profile_* session settings

> ClickHouse session settings in the jemalloc_profile_* generated group.

export const VersionHistory = ({rows = []}) => {
  if (rows.length === 0) {
    return null;
  }
  const headers = ["Version", "Default value", "Comment"];
  const border = "1px solid rgba(128, 128, 128, 0.3)";
  const cell = {
    border,
    padding: "0.25rem 0.5rem",
    textAlign: "start",
    verticalAlign: "top"
  };
  return <details className="not-prose" style={{
    border,
    borderRadius: "0.5rem",
    margin: "0.5rem 0",
    padding: "0.5rem 0.75rem",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <summary style={{
    cursor: "pointer",
    fontWeight: 600,
    opacity: 0.72
  }}>
        Version history
      </summary>
      <table style={{
    borderCollapse: "collapse",
    width: "100%",
    margin: "0.5rem 0 0"
  }}>
        <thead>
          <tr>
            {headers.map(header => <th key={header} style={{
    ...cell,
    fontWeight: 600,
    opacity: 0.72
  }}>
                {header}
              </th>)}
          </tr>
        </thead>
        <tbody>
          {rows.map((row, row_index) => <tr key={row.id ?? row_index}>
              {(row.items ?? []).map((item, item_index) => <td key={item_index} style={{
    ...cell,
    overflowWrap: "anywhere"
  }}>
                  {item?.label}
                </td>)}
            </tr>)}
        </tbody>
      </table>
    </details>;
};

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
  }}>Type</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>Default</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          Changeable without restart
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

These settings are available in [system.settings](/reference/system-tables/settings) and are autogenerated from [source](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp).

<h2 id="jemalloc_profile_text_collapsed_use_count">
  jemalloc\_profile\_text\_collapsed\_use\_count
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.2"},{"label": "0"},{"label": "New setting to aggregate by allocation count instead of bytes in the collapsed jemalloc heap profile format"}]}]} />

When using the 'collapsed' output format for jemalloc heap profile, aggregate by allocation count instead of bytes. When false (default), each stack is weighted by live bytes; when true, by live allocation count.

<h2 id="jemalloc_profile_text_output_format">
  jemalloc\_profile\_text\_output\_format
</h2>

<SettingsInfoBlock type="JemallocProfileFormat" default_value="collapsed" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.2"},{"label": "collapsed"},{"label": "New setting to control output format for system.jemalloc_profile_text table. Possible values: 'raw', 'symbolized', 'collapsed'"}]}]} />

Output format for jemalloc heap profile in system.jemalloc\_profile\_text table. Can be: 'raw' (raw profile), 'symbolized' (jeprof format with symbols), or 'collapsed' (FlameGraph format).

<h2 id="jemalloc_profile_text_symbolize_with_inline">
  jemalloc\_profile\_text\_symbolize\_with\_inline
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.2"},{"label": "1"},{"label": "New setting to control whether to include inline frames when symbolizing jemalloc heap profile. When enabled, inline frames are included at the cost of slower symbolization; when disabled, they are skipped for faster output"}]}]} />

Whether to include inline frames when symbolizing jemalloc heap profile. When enabled, inline frames are included which can slow down symbolization process drastically; when disabled, they are skipped. Only affects 'symbolized' and 'collapsed' output formats.