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-rw-r--r--doc/src/sgml/config.sgml4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 92ac53f9a5e..661bba99417 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1568,7 +1568,9 @@ include_dir 'conf.d'
<para>
At present, this setting is supported only on Linux and Windows. The
setting is ignored on other systems when set to
- <literal>try</literal>.
+ <literal>try</literal>. On Linux, it is only supported when
+ <varname>shared_memory_type</varname> is set to <literal>mmap</literal>
+ (the default).
</para>
<para>