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Foglight 6.3.0 - Performance Tuning Field Guide

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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

Topology Limits

Foglight® restricts the number of instances of an object of any type to 10000. When this limit is reached, the event is logged and should be investigated. Either it is an exceptional situation or the limit has to be raised (per type, using the foglight.limit.instances registry variable).

yyyy-mm-dd hh:mm:ss.mmm ERROR [Data-X-thread-Y] com.quest.nitro.service.topology.TopologyService - Failed to create a topology object with name Something: {...}: com.quest.nitro.service.sl.interfaces.topology.TopologyChangeVetoException: The configured limit of 10000 instances of type SQLServer_Backup has been reached.

Diagnostic Snapshot

The diagnostic snapshot is a text file contained in the Foglight® Management Server support bundle. It contains information that is very useful for diagnosing Management Server performance issues. Due to the fact that there is often a lot information in the snapshot, the information can be difficult to interpret.

The following is intended to serve as a map for extracting useful information from the snapshot. It is not meant to cover all aspects of the snapshot, just the more typical ones.

Memory Consumption

The memory consumption section shows the available and used memory:

---------------------------------------------------

Current memory load: 0.6002591924983527

Rounding error threshold: 1.0E-5

Min Free: 67107840

Current max: 1070399488

Current used: 842635096

Current load: 0.11604667718075726

-- Memory Pool ‘CMS Old Gen’ --

Min Free: 67107840

Current max: 1040187392

Current used: 831741608

Current load: 0.4842140916194773

---------------------------------------------------

Threads, Deadlocks, and Overall CPU Usage

A thread dump shows the current thread activity followed by thread utilization. It also provides markers to show deadlocked threads.

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