A.1 System configuration

Organization of this subsection

(1) Number of PFM - Web Consoles that can connect to a PFM - Manager
(2) Number of PFM - Agents and PFM - RMs that can connect to a PFM Manager
(3) Number of PFM - Agents and PFM - RMs to which PFM - Web Console can connect
(4) Number of hosts that can be managed

(1) Number of PFM - Web Consoles that can connect to a PFM - Manager

The maximum number of PFM - Web Consoles that can connect to a single PFM - Manager is 20.

(2) Number of PFM - Agents and PFM - RMs that can connect to a PFM Manager

The maximum number of PFM - Agents and PFM - RMs that can connect to a PFM - Manager is 1,200. This number would be 2,500 if you configure an environment according to the instructions provided in 2.5 Design of the operation of large systems. However, frequent issuance of alarm events by PFM - Agents and PFM - RMs or issuance of alarm events simultaneously by a number of PFM - Agents and PFM - RMs might result in delays in PFM - Manager's alarm event processing.

To ensure that PFM - Manager is able to process alarm events efficiently, design your system so that the maximum number of alarms that occur throughout the system does not exceed 150 per minute at a peak time. For details about the design of the frequency of alarm event occurrence, see 2.5.1(3) Taking the frequency of alarm event occurrence into account when configuring an environment.

However, the load on system performance caused by programs other than Performance Management is not considered. Check the specifics of system operation before starting operations, because the number of PFM - Agents and PFM - RMs and the maximum number of alarms per unit of time are estimated values.

Calculate the number of connectable PFM - Agents and PFM - RMs as follows:

For PFM - Agent

The number of PFM - Agents indicates the number of operating Agent Collector services.

If a host contains two multi-instance agents and one single-instance agent, the number of PFM - Agents on the host is three.
For PFM - RM:

The number of PFM - RMs indicates the total number of operating RM Collector services, monitoring remote agents, and group agents.

PFM - RM creates one group agent per instance. If a host contains two PFM - RM instances, and each instance is monitoring 10 remote agents, the number of PFM - RMs on the host is calculated as follows:

Notes:

If the number of PFM - Agents or PFM - RMs exceeds the maximum number of connections for a system, operate the system by deploying PFM - Manager at each site and distributing the PFM - Agents and PFM - RMs. In this case, operate the system by connecting PFM - Web Console to the PFM - Manager at each site.
Frequent issuance of alarm events by PFM - Agents and PFM - RMs or issuance of alarm events simultaneously by a number of PFM - Agents and PFM - RMs might result in delays in PFM - Manager's alarm event processing. In such cases, manage the system by deploying PFM - Manager at each site, and distributing PFM - Agents and PFM - RMs.
If you set an action for an alarm and select anything other than LOCAL for the Action handler in the Command field of the New Alarm > Action Definitions window on the PFM - Web Console, the workload might become concentrated on PFM - Manager. When an alarm triggers an action in a large system, select LOCAL for the Action handler in the Command field on the New Alarm > Action Definitions window to prevent the load on the PFM - Manager host from increasing severely.
If you set an alarm and select Always notify or Evaluate all data in the Advanced settings area on the New Alarm > Main Information window of the PFM - Web Console, alarm events will be issued more frequently. If you select these in a large system, do not increase the load on the system by setting the interval to high under Damping.
Starting PFM - Manager while many PFM - Agents and PFM - RMs are being started sometimes delays the start of PFM - Manager. In such cases, start PFM - Manager before starting the PFM - Agents and PFM - RMs.

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(3) Number of PFM - Agents and PFM - RMs to which PFM - Web Console can connect

This number is the maximum number of PFM - Agents and PFM - RMs to which a single PFM - Manager can connect.

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(4) Number of hosts that can be managed

The maximum number of hosts that can be managed by one PFM - Manager is 1,024. This number would be 2,500 if you configure an environment according to the instructions provided in 2.5 Design of the operation of large systems. This is the total number of physical hosts, logical hosts, and remote hosts that are monitored by PFM - RM. If PFM - Agent and PFM - RM are not located on a PFM - Manager, that PFM - Manager is not counted.

The following example illustrates how to determine the number of hosts.

Environment for the example Performance Management system

Host 1 has PFM - Manager installed, but has neither PFM - Agent nor PFM - RM.
Host 2 has PFM - Agent for Platform and PFM - Agent for Oracle (two instances are created).
Host 3 has two instances of PFM - RM, each of which monitors ten remote agents.
Host 4 has one logical instance of PFM - Agent for Oracle in a logical configuration.

How to determine the number of hosts

In this example, the total number of hosts is 0 + 1 + 21 + 2 = 24.

The following explains how to determine the number of hosts for each host.

For host 1, the number of hosts is zero because this host has neither PFM - Agent nor PFM - RM.
For host 2, the number of hosts is one although it has multiple PFM - Agents.
For host 3, the number of hosts on the same host is one although there are two instances of PFM - RM and the number of hosts monitored by remote agents is 20. Therefore, 1 + 20 = 21.
For host 4, PFM - Agent for Oracle has a logical configuration. The number of hosts is two because PFM services are located on both physical and logical hosts.

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