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Foglight for DB2 (Cartridge) 7.1.0 - Hardware Sizing Guide

Number of Foglight for DB2 LUW Agents Per Agent Manager

The number of agents that can be hosted on an Agent Manager depends on the size of the environment and the amount of memory allocated on an Agent Manager. Instances, databases, and members each count toward the number of agents. For example, one instance with two databases and two members counts as five agents (1+2+2=5). If you require more agents than can be supported by one Agent Manager, add additional Agent Managers.

 
Environment Size
Number of agents
Agent Manager with 256MB memory
Agent Manager with 1GB memory
Small

25

90

Medium

10

70

Large

5

40

Number of Foglight for DB2 LUW Agents Per Management Server

The number of agents that can be hosted on a Management Server depends on the size of the environment and the amount of memory allocated for the Management Server. If you require more agents than can be supported by one Management Server, add additional Management Servers.

 
Environment Size
Number of agents
Management Server with 4GB memory1
Management Server with 8GB memory
Small

250

500

Medium

200

400

Large

150

250

1

4GB is the default memory allocation.

NOTE: Use the Foglight for DB2 LUW installer to ensure that the default Repository type is set to Oracle/SQL Server.

Number of Files Opened on the Agent Manager Server

While monitoring DB2 instances, Foglight for DB2 LUW agents pass file descriptors to the kernel on the Agent Manager server to request that files be opened. For your reference, the following table states the number of files that are open while monitoring one DB2 instance. The numbers vary based on the operating systems used to host the Agent Manager and to host the DB2 instance. The last column shows how many files are opened when agents are added to monitor additional DB2 instances.

 
OS Hosting
Agent Manager
OS Hosting
DB2 Instance
DB
OS
IC
Total
Files per Agent Added

UNIX/Linux

UNIX/Linux

232

2

1

235

~6

Windows

203

0

1

204

~8

Windows

UNIX/Linux

320

11

1

332

~25

Windows

161

0

1

162

~2

Abbreviations used in the table:

•
DB = DB2 Database Instance
•
OS = Operating System
•
IC = Infrastructure Cartridge
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