High CPU consumption by mailer handler

[gandham-santhosh]

Hi, I am using sensu-plugins-mailer for alerts and notifications. I noticed that handler-mailer.rb is consuming 10 to 14% of CPU. I always see that sensu server CPU consumption is 100% as there are too many alert notifications. Can you please let me know if this is normal and what could be other alternatives? Following is the content in my handler.json

"infra_alert": {
"type": "set",
"handlers": [
"debug",
"slack_infra_alerts",
"mail_alert"
]
},
"mail_alert": {
"type": "set",
"filters": [
"not_wip"
],
"handlers": [
"mail_admin",
"mail_at_team_api"
]
},
"mail_admin": {
"type": "pipe",
"command": "handler-mailer.rb -j mailer_admin_team",
"filters": [
"status_not_ok"
]
},

[gandham-santhosh]

I see that 8 to 10 mailer handlers are getting initiated for every 3 to 5 seconds which is consuming 100% of CPU always. But I am not getting why it is initiating so many mailers threads. I really appreciate if someone help me understand