<varlistentry>
<term><option>-f <replaceable>filenode</replaceable></option></term>
<term><option>--filenode=<replaceable>filenode</replaceable></option></term>
<listitem>
<para>
Only validate checksums in the relation with filenode
<replaceable>filenode</replaceable>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-N</option></term>
<term><option>--no-sync</option></term>
<listitem>
<para>
By default, <command>pg_checksums</command> will wait for all files
to be written safely to disk. This option causes
<command>pg_checksums</command> to return without waiting, which is
faster, but means that a subsequent operating system crash can leave
the updated data directory corrupt. Generally, this option is useful
for testing but should not be used on a production installation.
This option has no effect when using <literal>--check</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-P</option></term>
<term><option>--progress</option></term>
<listitem>
<para>
Enable progress reporting. Turning this on will deliver a progress
report while checking or enabling checksums.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--sync-method=<replaceable>method</replaceable></option></term>
<listitem>
<para>
When set to <literal>fsync</literal>, which is the default,
<command>pg_checksums</command> will recursively open and synchronize
all files in the data directory. The search for files will follow
symbolic links for the WAL directory and each configured tablespace.
</para>
<para>
On Linux, <literal>syncfs</literal> may be used instead to ask the
operating system to synchronize the whole file systems that contain the
data directory, the WAL files, and each tablespace. See
<xref linkend="guc-recovery-init-sync-method"/> for information about
the caveats to be aware of when using <literal>syncfs</literal>.
</para>
<para>
This option has no effect when <option>--no-sync</option> is used.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-v</option></term>
<term><option>--verbose</option></term>
<listitem>
<para>
Enable verbose output. Lists