diff --git a/src/org/opensha2/calc/CalcConfig.java b/src/org/opensha2/calc/CalcConfig.java
index aee2ddfe2fe9833e3c57ac29c0e0c908c748983e..6c47ccd566412aa228126af251169336c85ce0b9 100644
--- a/src/org/opensha2/calc/CalcConfig.java
+++ b/src/org/opensha2/calc/CalcConfig.java
@@ -638,7 +638,7 @@ public final class CalcConfig {
         Builder b = new Builder();
         b.directory = Paths.get(DEFAULT_OUT);
         b.curveTypes = EnumSet.of(CurveType.TOTAL);
-        b.flushLimit = 20;
+        b.flushLimit = 5;
         return b;
       }