How to Aggregate Netezza event messages?
We can aggregate Netezza event messages which are set to send email but cannot set this for Netezza events which calls a command/script when triggered. Aggregation of events can be configured either at server level or per event level.
To set at server level, we have to follow below steps:
1) Pause the system
2) Run below command to setup system parameter. We can set a value from 0 – 82400 seconds
nzsystem set -arg sysmgr.maxAggregateEventInterval=120
3) Start the system
To check if this setting is enabled at instance level we can run below command:
nzsystem showRegistry | grep maxAggregateEventInterval
Since the above step needs outage to set this at server level, we can always set this at per event level aslo. If we set at event level, then it will be from 1 – 1000 occurances of events and not time based.
nzevent modify -u admin -pw password -name TestEvent -on yes -dst firstname.lastname@example.org -eventAggrCount 10
Above example will set the notification to 10 occurances. To set back to one occurrence set eventAggCount to 1.
When the aggregate events occur, system will write to /nz/kit/log/eventmgr/eventmgr.log for each time the evnet is triggered but will send email only when eventAggCount (at event level) or maxAggregateEventInterval (at system level) is reached. If both are enabled then which ever parameter is reached 1st will trigger the email.
Host : servername
Event : Hardware Disk Full.
Event Rule Detail : $threshold == 80 || $threshold == 85.
Start : 10-30-10 01:11:15 CDT.
Reporting Interval : 20 minutes.
Activity Duration : 00:01:37.
Number of events : 17
See, Number of events value in the email. These many events were aggregated in last 20 minutes (1200 sec)