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Warning: log write elapsed time 21621ms, size 8KB and similar

in Database Administration (MOSC) 7 commentsQuestion

Hello,

we have 19.15.0.0 running on Oracle Linux 8.2 (VM using very fast storage).

On the oracle I can see in the trace files reports about bad redolog writer performance. It is causing problems to the applications. On the OS monitoring tools we see normal performance on the I/O level (OS, VM and storage all OK).

Is there any way how to check more in detail the I/O subsystem to find where could be the problem? Any idea are welcome.

Ivo

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