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-rw-r--r--doc/manual/conf-file.xml12
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/manual/conf-file.xml b/doc/manual/conf-file.xml
index 66df3edd5..2ee268097 100644
--- a/doc/manual/conf-file.xml
+++ b/doc/manual/conf-file.xml
@@ -233,7 +233,17 @@ build-use-chroot = /dev /proc /bin</programlisting>
<filename>configure</filename> at build time.</para></listitem>
</varlistentry>
-
+
+
+ <varlistentry><term><literal>fsync-metadata</literal></term>
+
+ <listitem><para>If set to <literal>true</literal>, changes to the
+ Nix store metadata (in <filename>/nix/var/nix/db</filename>) are
+ synchronously flushed to disk. This improves robustness in case
+ of system crashes, but reduces performance. The default is
+ <literal>false</literal>.</para></listitem>
+
+ </varlistentry>
</variablelist>