C.5.12. Linux::swap Usage; C.5.13. Linux::tcp Connections By State - Red Hat NETWORK SATELLITE 5.1.1 Reference Manual

Appendix C. Probes
Field
Critical Maximum Number Running
Critical Minimum Number Running
Table C.25. Linux::Process Running settings

C.5.12. Linux::Swap Usage

The Linux::Swap Usage probe monitors the swap partitions running on a system and reports the
following metric:
• Swap Free — The percent of swap memory currently free.
Requirements — The Red Hat Network Monitoring Daemon (rhnmd) must be running on the
monitored system to execute this probe.
Field
Timeout*
Warning Minimum Swap Free
Critical Minimum Swap Free
Table C.26. Linux::Swap Usage settings

C.5.13. Linux::TCP Connections by State

The Linux::TCP Connections by State probe identifies the total number of TCP connections, as well as
the quantity of each in the following states:
• TIME_WAIT — The socket is waiting after close for remote shutdown transmission so it may handle
packets still in the network.
• CLOSE_WAIT — The remote side has been shut down and is now waiting for the socket to close.
• FIN_WAIT — The socket is closed, and the connection is now shutting down.
• ESTABLISHED — The socket has a connection established.
• SYN_RCVD — The connection request has been received from the network.
This probe can be helpful in finding and isolating network traffic to specific IP addresses or examining
network connections into the monitored system.
The filter parameters for the probe let you narrow the probe's scope. This probe uses the netstat
-ant command to retrieve data. The Local IP address and Local port parameters use values in
the Local Address column of the output; the Remote IP address and Remote port parameters use
values in the Foreign Address column of the output for reporting.
Requirements — The Red Hat Network Monitoring Daemon (rhnmd) must be running on the
monitored system to execute this probe.
Field
Local IP address filter pattern list
Local port number filter
218
Value
Value
15
Value