UNIX Resources monitor

The UNIX Resources monitor shows the UNIX resources measured during the test run. This graph helps you determine the impact of Vuser load on the various system resources.

In this topic:

Set up the UNIX monitoring environment

This task describes how to configure the UNIX environment before setting up the UNIX monitor.

1. Verify whether the rstatd daemon is already configured

   The rstatd daemon might already be configured, because when a machine receives an rstatd request, the inetd on that machine automatically activates the rstatd.

   • The rup command reports various machine statistics, including rstatd configuration. Run the following command on the UNIX machine to view the machine statistics:

   >rup host

   • You can also use lr_host_monitor and see if it returns any relevant statistics.

   If the command returns meaningful statistics, the rstatd daemon is already configured and activated. If not, or if you receive an error message, the rstatd daemon is not configured.

2. Configure the rstatd daemon

   If the rstatd daemon is not yet configured, follow these steps to configure it:

   1. On the UNIX machine, run the command: su root

   2. Go to /etc/inetd.conf and look for the rstatd row (it begins with the word rstatd). If it is commented out (with a #), remove the comment directive, and save the file.

   3. From the command line, run:

   kill -1 inet_pid

   where inet_pid is the pid of the inetd process. This instructs the inetd to rescan the /etc/inetd.conf file and register all daemons which are uncommented, including the rstatd daemon.

   4. Run rup again.

      If the command still does not indicate that the rstatd daemon is configured, contact your system administrator.

3. Configure the monitor for a UNIX machine over a firewall (optional)

   To monitor a UNIX machine over a firewall, you must run a UNIX utility called rpcinfo and identify the rstatd's port number.

   Run rpcinfo -p <hostname>. You will receive a list of all RPC servers registered in the host's portmapper, along with the port number. This list will not change until rstatd is stopped and rerun.

   Some firewalls allow you to open an RPC program number instead of a port. In such cases, open program 100001. If are prompted to include a version number, specify versions 3 and 4.

4. Configure the monitor as described in Configure the UNIX Resources monitor.

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Configure the UNIX Resources monitor

This task describes how to configure the UNIX Resources monitor.

1. Prerequisite

   If your monitor accesses a server outside of your internal network, you may need to set up a web proxy to collect data from it. For details, see Prerequisite (use a proxy server).

2. From the LoadRunner Enterprise navigation toolbar, click and select Monitors (under Assets).

3. In the test resource tree, select an existing monitor profile, or click New Monitor Profile and create a new monitor profile.

4. In the Monitor Profile page, click Add Monitor and select UNIX Resources.

5. In the UNIX Resources page, enter the name or IP address of the server whose resources you want to monitor.

6. Click Get Counters to display a list of available metrics and counters, and select the relevant measurements that you want to monitor.

   The following default measurements are available for the UNIX machine:

   Measurement	Description
   Average load	Average number of processes simultaneously in Ready state during the last minute.
   Collision rate	Collisions per second detected on the Ethernet.
   Context switches rate	Number of switches between processes or threads, per second.
   CPU utilization	Percent of time that the CPU is utilized.
   Disk rate	Rate of disk transfers.
   Incoming packets error rate	Errors per second while receiving Ethernet packets.
   Incoming packets rate	Incoming Ethernet packets per second.
   Interrupt rate	Number of device interrupts per second.
   Outgoing packets errors rate	Errors per second while sending Ethernet packets.
   Outgoing packets rate	Outgoing Ethernet packets per second.
   Page-in rate	Number of pages read to physical memory, per second.
   Page-out rate	Number of pages written to pagefiles and removed from physical memory, per second.
   Paging rate	Number of pages read to physical memory or written to pagefiles, per second.
   Swap-in rate	Number of processes being swapped in.
   Swap-out rate	Number of processes being swapped out.
   System mode CPU utilization	Percent of time that the CPU is utilized in system mode.
   User mode CPU utilization	Percent of time CPU is utilized in user mode.

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Notes and limitations

Problem: The Unix monitor does not work if RSTAT is not running, and returns the following error:

root@<LR Enterprise Server name>:~# rup <LR Enterprise Server name>
rup: RPC: Program not registered

Resolution:

1. Install rstatd by running the command:

   sudo apt-get install rstatd

2. Open the /etc/xinetd.conf file in a text editor and add the line:

   rstatd sunrpc_udp udp wait root /usr/sbin/rpc.rstatd rstatd 100001 1-3   

3. Restart rstatd by running the command:

   /usr/sbin/rpc.rstatd start

4. Verify rstatd is running on the localhost by running the command:

   rpcinfo -p localhost

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See also:

• Configure monitors