The url_response Timeout setting is set to 30 seconds (default) when you create a new profile. Some customers see timeout errors due to this out of the box default setting.
When a timeout occurs, the probe inserts a NULL value in the database, therefore, any relqted SLA calculations can potentially be impacted.
The alarms seem to come in waves: Server A will have 4 alarms from 4 of the 14 websites, but then work for another few hours with no problem. Usually, but not always, Server B will throw some alarms, but never from the same servers at the same time.
Often their presence in the alarm console/sub-console is short-lived as it can clear quickly.They are only visible via email alert or via nas Transaction history using a filter.