This metric represents the percentage of the Large Pool that is currently marked as free.
The rest of the information in this section is only valid for this metric when it appears in either the Enterprise Manager Grid Control or the Enterprise Manager Database Control (if applicable).
The following table shows how often the metric's value is collected and compared against the default thresholds. The 'Consecutive Number of Occurrences Preceding Notification' column indicates the consecutive number of times the comparison against thresholds should hold TRUE before an alert is generated.
|
Target Version |
Evaluation and Collection Frequency |
Upload Frequency |
Operator |
Default Warning Threshold |
Default Critical Threshold |
Consecutive Number of Occurrences Preceding Notification |
Alert Text |
|
pre-10g |
Every 15 Minutes |
After Every Sample |
< |
Not Defined |
Not Defined |
2 |
%value%%% of the large pool is free. |
|
10.1.0.x; 10.2.0.x; 11.1.0.x; 11.2.0.x |
Not Defined |
After Every Sample |
< |
Not Defined |
Not Defined |
2 |
%value%%% of the large pool is free. |
((Free/Total)*100) where:
Free: select sum(decode(name,'free memory',bytes)) from v$sgastat where pool = 'large pool'
Total: select sum(bytes) from v$sgastat where pool = 'large pool'
Consider enlarging the large pool or utilizing it more sparingly. This reduces the possibility of large memory areas competing with the library cache and dictionary cache for available memory in the shared pool.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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