private void configureOffheapSystemProperty() {
    Properties p = getDistributedSystemProperties();
    // p.setProperty(LOG_LEVEL, "finer");
    p.setProperty(OFF_HEAP_MEMORY_SIZE, "1m");
    getSystem(p);
  }
Tests the basic client-server transaction functionality
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ClientServerTransactionDUnitTest.java