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Foglight 5.9.1 - Performance Tuning Field Guide

Overview Hardware and Operating System Tuning Management Server Tuning Java Virtual Machine Tuning Backend Database Tuning High Availability (HA) Tuning Agent Tuning Appendix: Performance Health Check Appendix: Analyzing a Support Bundle

Possible Actions

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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.
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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 ...

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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.

Database Checks

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First, perform the Hosts dashboard performance test from the CPU section of the health check. Poor browser interface performance coupled with low CPU utilization indicates either a server block or a database problem. To check to see if there is a database problem, proceed to the next check.
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Check the available JDBC connections.
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Check CPU and I/O utilization on the database machine.
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Check the amount of memory allocated to the database:
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On an Oracle® database, check the SGA size:
SELECT SUM(bytes) FROM v$sgainfo WHERE resizeable = ‘Yes’
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On a MySQL database, check the InnoDB buffer pool size:
SHOW VARIABLES LIKE ‘innodb_buffer_pool_size’
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Check the database timing metrics.
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