luszczynski

<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.use_sql_coments" value="true" />
<property name="hibernate.generate_statistics" value="true" />
<property name="hibernate.cache.infinispan.statistics" value="true" />
<property name="hibernate.cache.use_structured_entries" value="true" />

luszczynski

# Change IFS according your needs
IFS=':' read -a array <<< "$string"

# Without index
for element in "${array[@]}"
do
    echo "$element"
done

# With index

luszczynski

private Map<Class<?>, String> getEJBLookups() throws NamingException, ClassNotFoundException {
		InitialContext ctx = new InitialContext();

		NamingEnumeration<NameClassPair> globals;
		NamingEnumeration<NameClassPair> modules;
		NamingEnumeration<NameClassPair> apps;

		Map<Class<?>,String> lookups = new HashMap<Class<?>,String>();

		globals = ctx.list("java:global");

luszczynski

@Resource(lookup = "java:app/AppName")
private String appName;

@Resource(lookup = "java:module/ModuleName")
private String moduleName;

luszczynski

private Object getEJB(final Class<?> ejbClass) throws Exception {
                try {
                        InitialContext ctx = new InitialContext();

                        NamingEnumeration<NameClassPair> globals;
                        NamingEnumeration<NameClassPair> modules;
                        NamingEnumeration<NameClassPair> apps;
                        NameClassPair global;
                        NameClassPair module;
                        NameClassPair app;

luszczynski

/subsystem=datasources/data-source=ExampleDS/statistics=pool:read-resource(runtime=true)

or

/subsystem=datasources/data-source=ExampleDS/statistics=pool:read-resource(include-runtime=true)

source: https://access.redhat.com/solutions/291093

parameter https://access.redhat.com/solutions/291093

luszczynski

/core-service=platform-mbean/type=memory:read-attribute(name=heap-memory-usage)
/core-service=platform-mbean/type=memory:read-attribute(name=non-heap-memory-usage)

luszczynski

Async Handler

How exactly does the async logging handler work in JBoss EAP 6?
https://access.redhat.com/solutions/709443

How do I change to the AsyncAppender?
https://access.redhat.com/solutions/444033

JBoss stalls with many threads blocking in AsyncHandler
https://access.redhat.com/solutions/261093

luszczynski

Number of physical CPUs

• grep physical.id /proc/cpuinfo | sort -u | wc -l

Number of cores per CPU

• grep cpu.cores /proc/cpuinfo | sort -u

Number of logical processors

• grep processor /proc/cpuinfo | wc -l

Source: https://access.redhat.com/solutions/224883

luszczynski

# Process over time
while ( sleep 1 ) ; do ps -p $PID -o %cpu,%mem,rss  ; done

# Final flags
java -XX:+PrintFlagsFinal -version | grep -i HeapSize

# Histogram
jmap -histo $PID

# Heap dump