This metric represents the total number of bytes sent and received through the SQL Net layer to and from the database.
This test checks the network read/write per second. If the value is greater than or equal to the threshold values specified by the threshold arguments, and the number of occurrences exceeds the value specified in the Number of Occurrences parameter, then a warning or critical alert is generated.
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 5 Minutes |
After Every Sample |
> |
Not Defined |
Not Defined |
2 |
Bytes transmitted via SQL*Net is %value%/sec. |
|
Target Version |
Server Evaluation Frequency |
Collection Frequency |
Upload Frequency |
Operator |
Default Warning Threshold |
Default Critical Threshold |
Consecutive Number of Occurrences Preceding Notification |
Alert Text |
|
10.1.0.x; 10.2.0.x; 11.1.0.x; 11.2.0.x |
Every Minute |
Not Defined |
After Every Sample |
> |
Not Defined |
Not Defined |
2 |
Generated By Database Server |
(DeltaBytesFromClient+DeltaBytesFromDblink+DeltaBytesToClient+DeltaBytesToDblink) / Seconds where:
Delta Bytes From Client: difference in 'select s.value from v$sysstat s, visitation n where n.name='bytes received via SQL*Net from client' and n.statistic#=s.statistic#' between end and start of sample period
DeltaBytesFromClient: difference in 'select s.value from v$sysstat s, v$statname n where n.name='bytes received via SQL*Net from dblink' and n.statistic#=s.statistic#' between end and start of sample period
DeltaBytesFromClient: difference in 'select s.value from v$sysstat s, v$statname n where n.name='bytes sent via SQL*Net to client' and n.statistic#=s.statistic#' between end and start of sample period
DeltaBytesFromClient: difference in 'select s.value from v$sysstat s, v$statname n where n.name='bytes sent via SQL*Net to dblink' and n.statistic#=s.statistic#' between end and start of sample period
Seconds: number of seconds in sample period
This metric represents the amount of network traffic in and out of the database. This number may only be useful when compared to historical levels to understand network traffic usage related to a specific database.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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