MySQL Bugs: #55875: Request for email alert if MEM can't collect data it needs for a rule

Bug #55875	Request for email alert if MEM can't collect data it needs for a rule
Submitted:	10 Aug 2010 10:16
Reporter:	James Day	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Enterprise Monitor: Agent	Severity:	S4 (Feature request)
Version:	2.2.2	OS:	Any
Assigned to:	Mark Matthews	CPU Architecture:	Any

Description:
We sometimes get requests for alerts if Enterprise Monitor has trouble collecting the information it needs for a rule. This is a feature request to handle that in some way.

How to repeat:
The easy one to repeat is to create a large InnoDB deadlock that blocks collecting some InnoDB status information. That case is handled in bug #45509. Others depend on which rule is to fail to collect data. can be anything from failure to connect to the server because it's very overloaded to whatever command a rule might need to run to collect its data.

Suggested fix:
Developer judgment about what rules might fail to collect their data and how to handle it is needed for the specific cases. Use judgment and pick those where it makes sense?