Skip large-memory tests unless enabled on a large enough GPU

cpp/tests/join/distinct_join_tests.cpp

@@ -734,7 +734,9 @@ TEST_F(DistinctJoinTest, InvalidLoadFactor)
                std::invalid_argument);
 }
 
-TEST_F(DistinctJoinTest, DistinctLargeExtentOverflowPrevention)
+// Disabled since this requires about 20GB of device memory.
+// Run with --gtest_also_run_disabled_tests to verify extent overflow prevention.
+TEST_F(DistinctJoinTest, DISABLED_DistinctLargeExtentOverflowPrevention)
 {
   // Test that validates size_t extent can handle hash table sizes that would
   // overflow int32_t extent when load_factor < 1.0

cpp/tests/join/semi_anti_join_tests.cpp

@@ -421,7 +421,9 @@ TEST_P(SemiAntiJoinTest, SemiJoinEmptyTables)
   }
 }
 
-TEST_P(SemiAntiJoinTest, AntiSemiJoinLargeExtentOverflowPrevention)
+// Disabled since this requires about 20GB of device memory.
+// Run with --gtest_also_run_disabled_tests to verify extent overflow prevention.
+TEST_P(SemiAntiJoinTest, DISABLED_AntiSemiJoinLargeExtentOverflowPrevention)
 {
   auto const implementation = GetParam();
   if (use_mark_join(implementation)) { GTEST_SKIP(); }