Package org.apache.jmeter.monitor.util
Class Stats
java.lang.Object
org.apache.jmeter.monitor.util.Stats
Description:
Stats is responsible for calculating the load and health of a given server. It uses tomcat's status servlet results. A schema was generated for the XML output and JAXB was used to generate classes.
The equations are:
memory weight = (int)(50 * (free/max))
thread weight = (int)(50 * (current/max))
The load factors are stored in the properties files. Simply change the values in the properties to change how load is calculated. The defaults values are memory (50) and threads (50). The sum of the factors must equal 100.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
static final double
static final int
static final int
static final int
static final int
static final double
static final int
static final double
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic int
calculateLoad
(Status stat) The method is responsible for taking a status object and calculating an int value from 1 to 100.static int
calculateMemoryLoad
(Status stat) Method will calculate the memory load: used / max = load.static int
calculateStatus
(Status stat) Method should calculate if the server is: dead, active, warning or healthy.static int
calculateThreadLoad
(Status stat) Method will calculate the thread load: busy / max = load.
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Field Details
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DEAD
public static final int DEAD- See Also:
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ACTIVE
public static final int ACTIVE- See Also:
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WARNING
public static final int WARNING- See Also:
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HEALTHY
public static final int HEALTHY- See Also:
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DEFAULT_MEMORY_FACTOR
public static final int DEFAULT_MEMORY_FACTOR- See Also:
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DEFAULT_THREAD_FACTOR
public static final int DEFAULT_THREAD_FACTOR- See Also:
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HEALTHY_PER
public static final double HEALTHY_PER- See Also:
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ACTIVE_PER
public static final double ACTIVE_PER- See Also:
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WARNING_PER
public static final double WARNING_PER- See Also:
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Constructor Details
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Stats
public Stats()
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Method Details
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calculateLoad
The method is responsible for taking a status object and calculating an int value from 1 to 100. We use a combination of free memory and free threads. The current factor is 50/50.- Parameters:
stat
- status information about the server- Returns:
- calculated load value
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calculateStatus
Method should calculate if the server is: dead, active, warning or healthy. We do this by looking at the current busy threads. -
calculateMemoryLoad
Method will calculate the memory load: used / max = load. The load value is an integer between 1 and 100. It is the percent memory used. Changed this to be more like other system monitors. Peter Lin 2-11-05- Parameters:
stat
- status information about the jvm- Returns:
- memory load
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calculateThreadLoad
Method will calculate the thread load: busy / max = load. The value is an integer between 1 and 100. It is the percent busy.- Parameters:
stat
- status information about the server- Returns:
- thread load
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