diff --git a/src/sampleconf/recoll.conf b/src/sampleconf/recoll.conf
index a666c64a..4a418093 100644
--- a/src/sampleconf/recoll.conf
+++ b/src/sampleconf/recoll.conf
@@ -433,10 +433,11 @@ webcachemaxmbs = 40
 # $XAPIAN_FLUSH_THRESHOLD documents created, modified or deleted: as memory
 # usage depends on average document size, not only document count, the
 # Xapian approach is is not very useful, and you should let Recoll manage
-# the flushes.  The default value of idxflushmb is 10 MB, and may be a bit
-# low. If you are looking for maximum speed, you may want to experiment
-# with values between 20 and
-# 80. In my experience, values beyond 100 are always counterproductive. If
+# the flushes. The program compiled value is 0. The configured default
+# value (from this file) is 10 MB, and will be too low in many cases (it is
+# chosen to conserve memory). If you are looking
+# for maximum speed, you may want to experiment with values between 20 and
+# 200. In my experience, values beyond this are always counterproductive. If
 # you find otherwise, please drop me a note.</descr></var>
 idxflushmb = 10