The number of blocks shown for an

upper-level node includes those used by all its child nodes. In text

format, only non-zero values are printed. Buffers information is

included by default when <literal>ANALYZE</literal> is used but

otherwise is not included by default, but can be enabled using this

option.

automatically included when <literal>ANALYZE</literal> is used.

</para>

</listitem>

</varlistentry>