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数据库应用程序报告性能缓慢和IO超时

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Category:
ontap-9
Specialty:
perf
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适用场景

  • ONTAP
  • NFS
  • Oracle DB

问题描述

  • Oracle警报日志指示日志写入器(LGWR)进程由于磁盘I/O操作而出现明显延迟。
  • 应用程序报告以下错误：
LGWR : Waits for event 'Disk File Operations I/O' for 66 secs
   .... 76 secs
  ---- 126 sec
 LGWR waits on event 'enq: CF - contention' for 90 secs
 
  • 不会发现存储层性能争用、延迟以亚毫秒为单位。

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