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Non-existing servers in procedure stats whitelist
If a server has been included in the dbo.procedure_stats_whitelist table, but does not exist anymore, this alert will be thrown.
To query the Performance Store database for servers that do not exist, but are marked to be excluded from the procedure stats functionality, use:
select a.* from dbo.procedure_stats_whitelist a left join dbo.servers s on s.server_name = a.server_name and s.discovered = 1 where s.server_name is null and a.server_name is not null
The alert will be visible on the Latest stats dashboard.
To exclude specific servers from this alert, see how to use the dbo.team_alert_exclude table in Alerting.