Log Buffer - Memory allocated for storing before and after image of changed data.
日志缓冲区——为存储更改数据的前后映像而分配的内存。
The data stored in memory could include all of the log events that a message would make during its flow.
内存中存储的数据可能包括某条消息在其消息流期间记录的所有日志事件。
The compressed data is kept both on disk and memory and DB2 also compresses user data stored in log files, thereby reducing log file size.
被压缩的数据同时存放在磁盘上和内存中，DB2 还压缩存储在日志文件中的用户数据，以便减少日志文件大小。
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