@Override
  protected final void postTearDown() throws Exception {
    if (cache != null) {
      cache.close();
    }
    if (ds != null) {
      ds.disconnect();
    }
  }
Disk region Perf test for Overflow only with Sync writes. 1) Performance of get operation for
entry in memory.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/diskPerf/DiskRegOverflowSyncGetInMemPerfJUnitPerformanceTest.java