diff --git a/java/benchmark/src/main/java/org/rocksdb/benchmark/DbBenchmark.java b/java/benchmark/src/main/java/org/rocksdb/benchmark/DbBenchmark.java
index 67f6a5cc0..da515219f 100644
--- a/java/benchmark/src/main/java/org/rocksdb/benchmark/DbBenchmark.java
+++ b/java/benchmark/src/main/java/org/rocksdb/benchmark/DbBenchmark.java
@@ -646,8 +646,8 @@ public class DbBenchmark {
               currentTaskId++, randSeed_, num_, num_, writeOpt, 1));
           break;
         case "fillbatch":
-          tasks.add(new WriteRandomTask(
-              currentTaskId++, randSeed_, num_ / 1000, num_, writeOpt, 1000));
+          tasks.add(new WriteSequentialTask(
+              currentTaskId++, randSeed_, num_, num_, writeOpt, 1000));
           break;
         case "fillrandom":
           tasks.add(new WriteRandomTask(
@@ -911,7 +911,7 @@ public class DbBenchmark {
         "\t\tfillseq          -- write N values in sequential key order in async mode.\n" +
         "\t\tfillrandom       -- write N values in random key order in async mode.\n" +
         "\t\tfillbatch        -- write N/1000 batch where each batch has 1000 values\n" +
-        "\t\t                   in random key order in sync mode.\n" +
+        "\t\t                   in sequential key order in sync mode.\n" +
         "\t\tfillsync         -- write N/100 values in random key order in sync mode.\n" +
         "\t\tfill100K         -- write N/1000 100K values in random order in async mode.\n" +
         "\t\treadseq          -- read N times sequentially.\n" +