@Override
    public void beforeDeletingCompactedOplog(Oplog oplog) {
      cache.getLogger().info("beforeDeletingCompactedOplog");
      oplogsSize.addAndGet(oplog.getOplogSize());
    }
Tests if without rolling the region size before close is same as after recreation
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/OplogJUnitTest.java