lgwr进程uselog

Oracle 12c NB特性多LGWR进程SCALABLE LGWR“_use_single_log_writer”

在12cR1 中真正用SCALABLE LGWR实现了这个目的，也可以俗称为多LGWR进程。select*from opt_12cR1 where name like '%log%'_use_single_log_writer ADAPTIVE Use a single process for redo log writing_max_outstanding_log_writes 2 ...

【12c新特性】多LGWR进程SCALABLE LGWR"_use_single_log_writer

SCALABLE LGWR是12cR1中引入的一个令人激动的特性，这是由于在OLTP环境中LGWR写日志往往成为系统的主要性能瓶颈，如果LGWR进程能像DBWR(DBW0~DBWn)那样多进程写出redo到LOGFILE那么就可能大幅释放OLTP的并发能力，增长Transcation系统的...

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