13,421 Metrics install automatically if you have Redgate Monitor installed.
If you are using Redgate’s SQL Server monitoring tool, Redgate Monitor, you can instantly install and run this metric on your servers.
This metric returns the number of foreign keys that have their is_not_trusted flag set to 1 in the sys.foreign_keys table.
A foreign key points to a primary key that must exist in another table, for example, column X in Table 1 must also be present in Table 2. The key protects this link, and only valid data can be inserted in the foreign key column. An untrusted foreign key may threaten a database’s referential and data integrity.
If the metric and alert tells you that untrusted foreign keys exist, find out which ones they are by running:
[sql]SELECT * FROM sys.foreign_keys WHERE is_not_trusted = 1 AND is_not_for_replication = 0[/sql]
For details of how to fix them, see Brent Ozar’s article: Blitz Result: Foreign Keys or Check Constraints Not Trusted.
Metric definition
Name
Untrusted foreign keys
Description
The number of foreign keys that have their is_not_trusted flag set to 1 in the sys.foreign_keys table. If foreign keys exist, find out which ones they are by running:
SELECT * FROM sys.foreign_keys WHERE is_not_trusted = 1 AND is_not_for_replication = 0For details of how to fix them, see Brent Ozar's article: Blitz Result: Foreign Keys or Check Constraints Not Trusted.
The T-SQL query that will collect data
Instances to collect from
Select all
Databases to collect from
0
Collection frequency
86400
Use collected or calculated values
Leave the Use a calculated rate of change between collections check box unchecked
Metric collection
Enabled
Alert definition
Alert name
Untrusted foreign keys
Description
SELECT * FROM sys.foreign_keys WHERE is_not_trusted = 1 AND is_not_for_replication = 0For details of how to fix them, see Brent Ozar's article: Blitz Result: Foreign Keys or Check Constraints Not Trusted.
Raise an alert when the metric value goes
Above the defined threshholds
Default threshold values
| High: | 0 |
| Medium: | Disabled |
| Low: | Disabled |
Note: These threshold settings are intended as guideline values. You may consider replacing them with values more suited to your environment.
Raise an alert when the threshold is passed for
1 collection
Alert is
Enabled
