private void setHTableSpecificConf() {
    if (this.htableDescriptor == null) {
      return;
    }
    long flushSize = this.htableDescriptor.getMemStoreFlushSize();

    if (flushSize <= 0) {
      flushSize = conf.getLong(HConstants.HREGION_MEMSTORE_FLUSH_SIZE,
        TableDescriptorBuilder.DEFAULT_MEMSTORE_FLUSH_SIZE);
    }
    this.memstoreFlushSize = flushSize;
    long mult = conf.getLong(HConstants.HREGION_MEMSTORE_BLOCK_MULTIPLIER,
      HConstants.DEFAULT_HREGION_MEMSTORE_BLOCK_MULTIPLIER);
    this.blockingMemStoreSize = this.memstoreFlushSize * mult;
  }
This is the global default value for durability. All tables/mutations not defining a
durability or using USE_DEFAULT will default to this value.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java