Trigger problem

[slavikss]

Hi.

Zabbix 3.2.6
Trigger {Template OS Linux:vm.memory.size[pavailable].last(0)}<10 generates problem event on every change of value when value is less then 10. I get lot of messages every time.
How to solve this?

Example:
Last value: 9.71 %
Date: 2017.07.13 09:54:36

Last value: 9.70 %
Date: 2017.07.13 09:31:07

Last value: 9.75 %
Date: 2017.07.13 09:28:04

[LenR]

Have you checked the item history? Is the value going > 10 between these events? If so, you have classic flapping.

[Akansha123]

Trigger {Template OS Linux:vm.memory.size[pavailable].last(0)}<10 generates problem event on every change of value when value is less then 10. I get lot of messages every time.
How to solve this?

Example:
Last value: 9.71 %
Date: 2017.07.13 09:54:36

Last value: 9.70 %
Date: 2017.07.13 09:31:07

Last value: 9.75 %
Date: 2017.07.13 09:28:04

According to your trigger generated and values obtained are less than 10. so, every time event will be generated and you'll obtain messages every time.This is the case of flapping where value obtained is just above or below set threshold(10 in your case). This will create more sensitive for event generation

To resolve this issue trigger should be defined as more logically below trigger expression can be used to receive less messages

{Template OS Linux:vm.memory.size[pavailable].min(5m)}<10

Trigger will be generated only when minimum of all values for last 5minutes are less than 10. So, this will decrease the frequency of message generation.

[slavikss]

> Have you checked the item history? Is the value going > 10 between these events? If so, you have classic flapping.

No, there is no flapping.

> To resolve this issue trigger should be defined as more logically below trigger expression can be used to receive less messages
> {Template OS Linux:vm.memory.size[pavailable].min(5m)}<10
> Trigger will be generated only when minimum of all values for last 5minutes are less than 10. So, this will decrease the frequency of message generation.

Seems it fixed the problem, a couple of hours and no messages.

Thanks!