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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 f178835d2b0..898cdacbb10 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1354,7 +1354,8 @@ SET ENABLE_SEQSCAN TO OFF;
simultaneously. Raising this value will increase the number of I/O
operations that any individual <productname>PostgreSQL</> session
attempts to initiate in parallel. The allowed range is 1 to 1000,
- or zero to disable issuance of asynchronous I/O requests.
+ or zero to disable issuance of asynchronous I/O requests. Currently,
+ this setting only affects bitmap heap scans.
</para>
<para>