Zabbix Trigger if key under Value x times in x hours

[poxin]

Hello,

I'm trying to setup a trigger where if Free Memory has gone under 15%, 5 times in a 24 hour period then alert.

vmw.MemFreePercent[{perfree}]

I'm not sure what expression to use for that kind of scenario. Any help would be appreciated.

Also does this look right for is perfree is under 15 for 30 minutes then trigger?
vmw.MemFreePercent[{perfree}].min(30m)}<15

[poxin]

No solutions for this type of trigger?

[glebs.ivanovskis]

In the first case you need something like:
{vmw.MemFreePercent[{perfree}].count(24h,15,lt)}>5

In the second case you should use max() instead of min(). This would mean that item values were under 15 for the whole period of 30 minutes.

[poxin]

Perfect, thank you very much!

Any suggestions for how to combine those two? Something like:

vmw.MemFreePercent[{perfree}](.max(30m)}<15).count(24h,15,lt)}>5

Where if perfree is under 15% for 30 minutes, 5 times in 24 hours. Not sure of the syntax for this.

[poxin]

I already have a trigger existing for
vmw.MemFreePercent[{perfree}].max(30m)}<15

Can you reference a trigger in another trigger somehow? Might be the way to go for that if so.

{Trigger.Name}.count(24h,15,lt)}>5 or something

[glebs.ivanovskis]

vmw.MemFreePercent[{perfree}](.max(30m)}<15).count(24h,15,lt)}>5

Exactly one trigger function per item is allowed in expressions.

Can you reference a trigger in another trigger somehow?

No, you can't.

But there is a way, see calculated items. Their syntax is kinda other way round, but all trigger functions are supported.