Sun Microsystems GLASSFISH ENTERPRISE 820433510 - Manual (Page 187)

TABLE 18–15 Transaction Service Statistics (Continued)
Statistic Data Type Description
committedcount CountStatistic Number of transactions that have been
committed.
rolledbackcount CountStatistic Number of transactions that have been
rolled back.
state StringStatistic Indicates whether or not the transaction
has been frozen.
Java Virtual Machine (JVM) Statistics
The JVM has monitorable attributes that are always enabled. The statistics available for the
JVM are shown in the following table.
TABLE 18–16 JVM Statistics
Statistic Data Type Description
heapsize BoundedRangeStatistic The resident memory footprint with the
higher and lower bounds of the JVM’s
memory heap size.
uptime CountStatistic The amount of time the JVM has been
running.
JVM Statistics in Java SE
With Java SE, additional monitoring information can be obtained from the JVM. Set the
monitoring level to LOW to enable the display of this additional information. Set the
monitoring level to HIGH to also view information pertaining to each live thread in the system.
More information on the additional monitoring features for Java SE is available in a document
titled Monitoring and Management for the Java Platform, which is available from
http://java.sun.com/javase/6/docs/technotes/guides/management/ .
The Java SE monitoring tools are discussed at
http://java.sun.com/javase/6/docs/technotes/tools/#manage .
The statistics available for class loading in the JVM in Java SE are shown in the following table.
TABLE 18–17 JVM Statistics for Java SE- Class Loading
Statistic Data Type Description
loadedclasscount CountStatistic Number of classes that are currently
loaded in the JVM.
About Monitoring
Chapter 18 • Monitoring Components and Services 187