Re: Alert Once Functionality.

N -

Over many years of dealing with this problem what I have come to is a
"split-the-difference" approach.  What we do is send important error
messages via e-mail once and then again and again at ever slower intervals
-- much like the DBMS_JOB failure/reschedule algorithm.  After the message
has been sent out "N" times and not acknowledged, we stop sending it
figuring that all we are doing is filling a mailbox.  The resend interval,
slowdown rate, and stop threshold is configured based on the error.  This
approach has served us fairly well.

On 4/18/07, Norman Dunbar <norman.dunbar@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:


Morning Niall,

>> ... or being alerted on the detection of a problem, and then not
until it is
>> resolved. If anyone uses the second approach I'd love to hear what
tools you
>> use.

In a word, Nagios.

It can be configured to send an alert when a service goes down, then
repeatedly every n minutes and finally, an un-alert when the service
comes back up. Alternatively, it can be configured to alert once on
detection of the problem and again when it comes back up.

When monitoring here, I get alerted every half hour until fixed. That's
how we like it, so we have turned off the alerting once option. In
addition, we can also set a time period in which no alerts should be
sent out.

Obviously, the 'eye candy' screen giving an overview of the system
shows all problems all the time.


Cheers,
Norman.

Norman Dunbar.
Contract Oracle DBA.
Rivers House, Leeds.

Internal : 7 28 2051
External : 0113 231 2051


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