1 Reply Latest reply: Feb 28, 2013 12:38 AM by 702469 RSS

    Log file sync switching to polling及post/wait的含义

    957377
      刘老师,您好

      DB 11.2.0.3.0 Linux x86-64
      GI 11.2.0.3.0 Linux x86-64
      OS RHEL 5.5
      2节点RAC

      LGWR Trace文件中交替出现如下内容
      *** 2012-11-26 09:16:52.063
      Log file sync switching to polling
      Current scheduling delay is 1 usec
      Current approximate redo synch write rate is 1 per sec
      kcrfw_update_adaptive_sync_mode: poll->post current_sched_delay=0 switch_sched_delay=1 current_sync_count_delta=0 switch_sync_count_delta=3
      
      *** 2012-11-26 10:42:15.844
      Log file sync switching to post/wait
      Current approximate redo synch write rate is 0 per sec
      kcrfw_update_adaptive_sync_mode: post->poll long#=1 sync#=3 sync=3404 poll=2930 rw=1465 rw+=1513 ack=0 min_sleep=1935
      
      *** 2012-11-26 13:53:37.275
      Log file sync switching to polling
      Current scheduling delay is 1 usec
      Current approximate redo synch write rate is 1 per sec
      kcrfw_update_adaptive_sync_mode: poll->post current_sched_delay=0 switch_sched_delay=1 current_sync_count_delta=0 switch_sync_count_delta=3
      什么含义?