fix: Make TPCH dbgen text buffer size consistent with Presto Java

velox/connectors/tpch/tests/TpchConnectorTest.cpp

@@ -97,11 +97,11 @@ TEST_F(TpchConnectorTest, simple) {
       makeFlatVector<int64_t>({0, 1, 1, 1, 4}),
       // n_comment
       makeFlatVector<StringView>({
-          "furiously regular requests. platelets affix furious",
-          "instructions wake quickly. final deposits haggle. final, silent theodolites ",
-          "asymptotes use fluffily quickly bold instructions. slyly bold dependencies sleep carefully pending accounts",
-          "ss deposits wake across the pending foxes. packages after the carefully bold requests integrate caref",
-          "usly ironic, pending foxes. even, special instructions nag. sly, final foxes detect slyly fluffily ",
+          " haggle. carefully final deposits detect slyly agai",
+          "al foxes promise slyly according to the regular accounts. bold requests alon",
+          "y alongside of the pending deposits. carefully special packages are about the ironic forges. slyly special ",
+          "eas hang ironic, silent packages. slyly regular packages are furiously over the tithes. fluffily bold",
+          "y above the carefully unusual theodolites. final dugouts are quickly across the furiously regular d",
       }),
   });
   test::assertEqualVectors(expected, output);

velox/tpch/gen/DBGenIterator.cpp

@@ -37,7 +37,8 @@ class DBGenBackend {
     // structures required by dbgen are populated.
     DBGenContext dbgenCtx;
     load_dists(
-        10 * 1024 * 1024, &dbgenCtx); // 10 MB buffer size for text generation.
+        300 * 1024 * 1024,
+        &dbgenCtx); // 300 MB buffer size for text generation.
   }
   ~DBGenBackend() {
     cleanup_dists();