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Foglight for DB2 5.7.5.1 - Foglight for DB2 LUW 5.7.5.1 Hardware Sizing Guide

Introduction to this Guide

Welcome to the Foglight for DB2 LUW Hardware Sizing Guide. This guide is intended to assist with determining the optimal hardware requirements and product configurations to ensure the best user experience possible.

DB2 Agents — System Requirements

Use the following to determine the amount of resources required to monitor your DB2 instances.
Allocate resource for:
•
Foglight Management Server
•
Agent Manager
The preceding monitoring elements can be either distributed over different machines (preferable in large environments) or centralized. For more information, see Deployment Use Cases.
Reserve the following on a virtual machine (VM):
•
Memory — the full amount of the required machine memory
•
CPU — the amount of CPU MHz

Foglight Management Server

 
Table 1. Foglight Management Server
Machine
 
Configuration
# of DB2 Agents
Memory
CPUs (2.4GHz)
 
Foglight JVM settings (MB)
1 to 100
8GB
4 cores
 
Xms|Xmx=4096
101 to 200
10GB
4 cores
 
Xms|Xmx=6144
201 to 400
12GB
4 cores
 
Xms|Xmx=8192
Note the following:
•
For more than 100 agents an external repository is recommended.
•
The preceding sizing considers the equivalent Infrastructure agents.
•
To change the memory settings, edit the Foglight Management Server JVM settings in the server.config file located under <Foglight installation directory>\config\.
•
The maximum disk space measured is 2GB per DB2 agent.

Agent Manager

We recommend that you increase the max-disk-space="102400" for following settings: upstream, upstream-verified, downstream.
Network throughput measured from the Agent Manager to the Monitored host average is 0.36 MBps per DB2 agent.
Table 2. DB2 Agents
Machine
 
Configuration
# of DB2 Agents
Memory (GB)
CPUs (2.4GHz)
 
Agent Manager
JVM settings (MB)
1 to 5
1GB
1 core
 
Xms|Xmx=256
6 to 10
2GB
1 core
 
Xms|Xmx=500
11 to 100
4GB
2 cores
 
Xms|Xmx=2048
101 to 200
6GB
4 cores
 
Xms|Xmx=4096
201 to 300
8GB
6 cores
 
Xms|Xmx=6144
301 to 400
10GB
8 cores
 
Xms|Xmx=8192
Note the following:
•
The preceding sizing considers the equivalent Infrastructure agents.
•
To change the memory settings, edit the Agent Manager JVM settings in the baseline.jvmargs.config file located under <Agent Manager installation directory>\state\default\config\.
Note the following:
•
The preceding sizing considers the equivalent Infrastructure agents.
•
The monitoring overhead on the DB2 instance measured is below 2%
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