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Foglight 7.3.0 - Performance Tuning Field Guide

콘텐츠 탐색

Characteristics of Poor Performance in Foglight Parameters that Affect Foglight Performance Critical Areas that Can Affect Foglight Performance Identifying Performance Problems

Hardware and Operating System Tuning

Running on Virtual Hardware

Performance Challenges CPU

Ready Time

Diagnostic Snapshot

Management Server Tuning

Dashboard Default Timeout

Java Virtual Machine Tuning

Getting Started Foglight JVM Configuration

-XX:+UseConcMarkSweepGC -Xmx and -Xms -XX:NewSize, -XX:MaxNewSize, and -XX:NewRatio -XX:MaxPermSize -Xss

Common Symptoms and Tuning Resolutions

Backend Database Tuning

Initial Database Configuration Settings

Monitoring and Managing Database Size Backup and Recovery Recommendations init.ora Configuration

Sample init.ora:

Database Maintenance Recommendations

Case

How the Management Server Uses the Database Index Management Memory Block Size Oracle Striping Oracle Tablespaces

Undo tablespace Custom Tablespaces

Microsoft SQL Server Tuning PostgreSQL Tuning Troubleshooting

Management Server Load Preventing Database Connections

High Availability (HA) Tuning

Tuning Connection Issues in an HA Implementation Managing Hosts with Multiple Network Interfaces JDK with IPv6 on Linux Management Server Automatically Restarted Other JGroup Related Issues and Information

Topology Changes and Topology Churn Canonical Data Transformations (CDTs) Agent Weight / Environment Complexity Large Topologies Sampling Frequency XML-HTTP Agent Adapter Dropped Agent Manager Log Messages Java EE Technologies

Store and Forward Processing

About Store and Forward Processing in Foglight Store and Forward Processing and the Foglight Management Server Store and Forward Processing and the Foglight Agent Manager

Viewing the Settings that Control the Size of Stored Data

Example 1: Reporting on Disk Usage Example 2: Calculating Service Availability Metrics

Appendix: Performance Health Check

Is the Server Getting the Right Amount of Memory?

Management Server Memory is Healthy if ... Management Server Memory Checks Possible Actions

Is the Server Getting Enough CPU?

Management Server CPU is Healthy if ... Management Server CPU Checks Extended Browser Interface Checks Possible Actions

Is the Database too Slow?

The Database is Healthy if ... Database Checks Possible Actions

Is the Database Growth Reasonable?

Database Growth is Healthy if ... Database Checks Possible Actions

Is There Too Much Data to Process?

Data Volume is Healthy if ... Data Volume Checks Possible Actions

Is the Model Stable?

The Model is Healthy if ... Model Checks Possible Actions

Are Too Many Alarms Firing?

The Number of Alarms is in a Healthy State if... Alarms Checks Possible Actions

Is the Business Logic Properly Tuned?

Business Logic is Healthy if... Business Logic Checks Possible Actions

Are There Too Many User Requests?

User Activity Is Healthy If... Possible Actions

Appendix: Analyzing a Support Bundle

Topology Sync Topology Limits

Diagnostic Snapshot

Memory Consumption Threads, Deadlocks, and Overall CPU Usage Useful Information ---- jboss.system:type=ServerInfo ---- jboss.jca:service=ManagedConnectionPool,name=jdbc/nitrogen ---- jboss.web:type=RequestProcessor,* ---- com.quest.nitro:service=Derivation

Derivation Related Issues

---- com.quest.nitro:service=Topology

Topology Related Issues

---- com.quest.nitro:service=DataCacheEviction

Analyzing a Performance Report

Server Rule Information System-wide Topology Changes JVM Memory Usage Management Server Garbage Collectors JDBC Connection Pool Derivation Rulette

Extended Browser Interface Checks

Although the two are not directly coupled, user interface performance is related to CPU health. Therefore, it makes sense to check browser interface performance when verifying whether or not the CPU is healthy. To check browser interface performance, measure the first time and reload times for the following views:

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•

•

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Administration Home

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•

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You should perform these tests in order to detect any known bottlenecks.

Possible Actions

•

Remove other processes from the system.

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Reconfigure the virtual image to have access to more resources.

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Move Foglight to a more powerful machine.

•

Configure the operating system to allow Foglight® to have access to all available CPUs.

Is the Database too Slow?

A slow database slows down database queries. This in turn slows down metric queries from the browser interface.

The Database is Healthy if ...

•

The number of JDBC connections available is close to the maximum. This means that queries are not getting stuck waiting for the database to return.

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The CPU utilization on the database machine is substantial, but not greater than 90 percent on average, indicating a non-blocked system that has enough resources available.

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The browser interface is performing well on metric queries. This can be tested with any dashboard that graphs a metric.

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