How to Tell if the I/O of the Database is Slow
(Doc ID 1275596.1)
Last updated on JULY 05, 2021
Oracle Database Exadata Express Cloud Service - Version N/A and later Oracle Database Backup Service - Version N/A and later Oracle Database Cloud Exadata Service - Version N/A and later Oracle Database Cloud Service - Version N/A and later Oracle Database - Enterprise Edition - Version 220.127.116.11 and later Information in this document applies to any platform.
This document outlines some of the thresholds whereby RDBMS Support may consider IO to be slow and thus a potential reason for a performance problem. It also looks into how to collect the supporting evidence from the RDBMS perspective. It does not aim to provide diagnostics to understand why the IO is slow nor does it provide any detailed explanation as to why slow IO may be occurring.
If the underlying cause for slow performance is found to be a result of slow IO at the OS level, then the appropriate vendor responsible for the IO subsystem (hardware and software) should be engaged to diagnose and correct the situation.
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