ServerNet Cluster Manual

Troubleshooting and Replacement Procedures

ServerNet Cluster Manual—520575-003

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Diagnosing Performance Problems

Diagnosis of performance problems in any environment involves multiple steps and

requires extensive knowledge of performance fundamentals and methodologies. If

there are ServerNet Cluster performance issues, you might want to explore these

areas:

•

Throughput: How much traffic is flowing through nodes and between individual

processors?

•

Latency: How well does traffic flow?

•

Problem isolation: What is responsible for the problem?

The Measure performance tool can assist you in collecting data for throughput and

latency analysis. Measure has a SERVERNET entity that tracks all the interprocessor

communication for remote nodes (remote IPC type). This information allows you to

isolate and examine the flow of ServerNet cluster traffic. Another area to investigate, if

you suspect performance degradation, is the health of your EXPAND lines. For more

information on the SERVERNET, NETLINE, and PROCESS entities and the G08

counters added specifically for ServerNet cluster support, consult the Measure

Reference Manual.