Journaling options and write latency.
日志记录选项和写等待时间。
Therefore, the data write-in method can reduce meaningless data migration to improve the system efficiency and avoid the long write latency time.
基此，可减少无意义的数据搬移以提升系统效能并且避免长写入等待时间。
The write-behind configuration should be tuned to best match your environment with regards to the ratio of write transactions, the same record update frequency, and database update latency.
write - behind的配置可以调整，以满足自己的运行环境，这其中包括写事务的比例，相同记录更新的频率，以及数据库的更新延迟。
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