@Override
  protected final void postSetUp() throws Exception {
    diskProps.setDiskDirs(dirs);
    // Properties properties = new Properties();
    diskProps.setBytesThreshold(10000l);
    diskProps.setTimeInterval(1000l);
    diskProps.setOverFlowCapacity(1000);
    region = DiskRegionHelperFactory.getAsyncOverFlowOnlyRegion(cache, diskProps);
    log = ds.getLogWriter();
  }
Disk region Perf test for Overflow only with ASync writes. 1) Performance of get operation for
entry in memory.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/diskPerf/DiskRegOverflowAsyncGetInMemPerfJUnitTest.java