AWR – Host CPU

AWR - Host CPU

In AWR, the ‘Host CPU’ table comes under the ‘Report Summary’ section. Refer to the below figure: The following metrics are available in the ‘Host CPU’ table of an AWR report: CPUs The number of CPUs is the product of the number of cores and threads available on the database server. Formula: CPU = Number … Read more

AWR – Wait Classes by Total Wait Time

In AWR, the ‘Wait Classes by Total Wait Time’ table comes under the ‘Report Summary’ section. Refer to the below figure: To analyse this section, firstly check for the ‘Wait Class’ column. If User I/O, System I/O and Others have moderate ‘Waits’ value then it is fine. But if ‘Concurrency’ under the wait class has … Read more

AWR – Instance Efficiency Percentages

AWR Instance Efficiency Percentages

In AWR, the ‘Instance Efficiency Percentages’ table comes under the ‘Report Summary’ section. Refer to the below figure: The following metrics are available in the ‘Instance Efficiency Percentages’ table of an AWR report: Buffer Nowait % (Buffer Nowait Ratio) This metric provides the percentage of availability of the data buffers. This ratio gives an idea … Read more