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-rw-r--r--doc/manual/env-common.xml18
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/manual/env-common.xml b/doc/manual/env-common.xml
index e6a358931..9e97e58f5 100644
--- a/doc/manual/env-common.xml
+++ b/doc/manual/env-common.xml
@@ -312,6 +312,24 @@ $ mount -o bind /mnt/otherdisk/nix /nix</screen>
</varlistentry>
+<varlistentry><term><envar>NIX_SHOW_STATS</envar></term>
+
+ <listitem><para>If set to <literal>1</literal>, Nix will print some
+ evaluation statistics, such as the number of values
+ allocated.</para></listitem>
+
+</varlistentry>
+
+
+<varlistentry><term><envar>NIX_COUNT_CALLS</envar></term>
+
+ <listitem><para>If set to <literal>1</literal>, Nix will print how
+ often functions were called during Nix expression evaluation. This
+ is useful for profiling your Nix expressions.</para></listitem>
+
+</varlistentry>
+
+
<varlistentry><term><envar>GC_INITIAL_HEAP_SIZE</envar></term>
<listitem><para>If Nix has been configured to use the Boehm garbage