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-rw-r--r--doc/src/sgml/config.sgml3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 7554cba3f96..b8e32d765bd 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -4147,7 +4147,8 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class="
used. When setting this parameter you should consider both
<productname>PostgreSQL</productname>'s shared buffers and the
portion of the kernel's disk cache that will be used for
- <productname>PostgreSQL</productname> data files. Also, take
+ <productname>PostgreSQL</productname> data files, though some
+ data might exist in both places. Also, take
into account the expected number of concurrent queries on different
tables, since they will have to share the available
space. This parameter has no effect on the size of shared