private static ThreadPoolExecutor createDefaultWriteExecutor() {
        return ThreadPoolUtil.newThreadPool("RocksDBSegmentLogStorage-write-pool", true, Utils.cpus(),
            Utils.cpus() * 3, 60, new ArrayBlockingQueue<>(10000), new NamedThreadFactory(
                "RocksDBSegmentLogStorageWriter"), new ThreadPoolExecutor.CallerRunsPolicy());
    }
Creates a RocksDBSegmentLogStorage builder.
@return a builder instance.
jraft-core/src/main/java/com/alipay/sofa/jraft/storage/log/RocksDBSegmentLogStorage.java