perf function definition

[dabenavidesd]

Hello people:
has the zabbix manual an entry for .perf function? (i can't see it), i.e:

host:net.tcp.service.perf[ssh,,{$SSH_PORT}].sum(#2)}=0

What does it mean?

Thanks in advance

[brico]

net.tcp.service.perf[service,<ip>,<port>] - "Checks performance of TCP service."

Documentation: https://www.zabbix.com/documentation...s/zabbix_agent

[dabenavidesd]

=0 is port down?

hello Brico:
OK, I read in that page you cite, from ( https://www.zabbix.com/documentation...ger_expression and your link) I see:
net.tcp.service.perf[service,<ip>,<port>] is a <key>

but anything at its right as ( https://www.zabbix.com/documentation...ger_expression )
net.tcp.service.perf[].sum is a <key>.<function>

So the complete expression:

{Template Zabbix agent Windows:net.tcp.service.perf[tcp,,3389].sum(#2)}=0

=0 means in last two attempts port was down (as is now), correct? Any other possibility?

Thanks in advance

[brico]

Thank you for clarifying the question.

Yes, you are correct. The provided trigger expression calculates the sum of the last two values. In this case, the item net.tcp.service.perf[tcp,,3389] is providing the response time in seconds so zero would mean the port is down.

Keep in mind this particular item should be set as a float value since sub-second responses are expected.