User's Manual

Appendix C. Probes 163

Field Value

Username

Password

MySQL Port* 3306

Timeout 15

Critical Maximum Threads Running

Warning Maximum Threads Running

Warning Minimum Threads Running

Critical Minimum Threads Running

Table C-36. MySQL::Threads Running settings

C.8. Network Services

The probes in this section monitor various services integral to a functioning network. When applying

them, ensure their timed thresholds do not exceed the amount of time allotted to the timeout period.

Otherwise, an UNKNOWN status will be returned in all instances of extended latency, thereby nulli-

fying the thresholds.

C.8.1. Network Services::DNS Lookup

The Network Services::DNS Lookup probe uses the dig command to see if it can resolve the system

or domain name speciﬁed in the Host or Address to look up ﬁeld. It collects the following metric:

• Query Time — The time in milliseconds required to execute the dig request.

This is useful in monitoring the status of your DNS servers. If you want to monitor one of your DNS

servers, supply a well-known host/domain name, such as a large search engine or corporate Web site.

Field Value

Host or Address to look up

Timeout* 10

Critical Maximum Query Time

Warning Maximum Query Time

Table C-37. Network Services::DNS Lookup settings

C.8.2. Network Services::FTP

The Network Services::FTP probe uses network sockets to test FTP port availability. It collects the

following metric:

• Remote Service Latency — The time it takes in seconds for the FTP server to answer a connection

request.