Java - Revision history

T1t0: /* Options */

2024-11-14T13:14:49Z

Options

← Older revision		Revision as of 13:14, 14 November 2024
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	* small pauses		* small pauses
	<pre>		<pre>
	-~~Xms=16g~~ -~~Xmx=16g~~ -XX:+AlwaysPreTouch -XX:MaxGCPauseMillis=50 -Dlog4j.formatMsgNoLookups=true -XX:+UseG1GC		-Xms16g -Xmx16g -XX:-UseContainerSupport -XX:+AlwaysPreTouch -XX:MaxGCPauseMillis=50 -Dlog4j.formatMsgNoLookups=true -XX:+UseG1GC
	</pre>		</pre>

	or, if your JVM supports ShenandoahGC (see https://stackoverflow.com/a/69231190)		or, if your JVM supports ShenandoahGC (see https://stackoverflow.com/a/69231190)
	<pre>		<pre>
	-~~Xms=16g~~ -~~Xmx=16g~~ -XX:+AlwaysPreTouch -XX:MaxGCPauseMillis=50 -Dlog4j.formatMsgNoLookups=true -XX:+UseShenandoahGC		-Xms16g -Xmx16g -XX:-UseContainerSupport -XX:+AlwaysPreTouch -XX:MaxGCPauseMillis=50 -Dlog4j.formatMsgNoLookups=true -XX:+UseShenandoahGC
	</pre>		</pre>

T1t0: /* Options */

2024-06-15T18:07:14Z

Options

← Older revision		Revision as of 18:07, 15 June 2024
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	* default options (see https://docs.oracle.com/en/java/javase/17/docs/specs/man/java.html and https://chriswhocodes.com/hotspot_options_openjdk17.html)		* default options (see https://docs.oracle.com/en/java/javase/17/docs/specs/man/java.html and https://chriswhocodes.com/hotspot_options_openjdk17.html)

			note, use
			<pre>
			java -XX:+PrintCommandLineFlags -version
			</pre>

			to veryfy what you got, for example
			<pre>
			-XX:ConcGCThreads=2 -XX:G1ConcRefinementThreads=6 -XX:GCDrainStackTargetSize=64 -XX:InitialHeapSize=522556352 -XX:MarkStackSize=4194304 -XX:MaxHeapSize=8360901632 -XX:MinHeapSize=6815736 -XX:+PrintCommandLineFlags -XX:ReservedCodeCacheSize=251658240 -XX:+SegmentedCodeCache -XX:+UseCompressedOops -XX:+UseG1GC
			openjdk version "21" 2023-09-19
			OpenJDK Runtime Environment (build 21+35-2513)
			OpenJDK 64-Bit Server VM (build 21+35-2513, mixed mode, sharing)
			</pre>

			or also
			<pre>
			java -XX:+UnlockDiagnosticVMOptions -XX:+PrintFlagsFinal -version
			</pre>

			* an example

	<pre>		<pre>
	-XX:+UseContainerSupport -XX:-UseStringDeduplication -XX:+CompactStrings -XX:-DisableExplicitGC -XX:ActiveProcessorCount=-1 -XX:MinHeapFreeRatio=40 -XX:MaxHeapFreeRatio=70 -XX:GCTimeRatio=12		-XX:+UseContainerSupport -XX:-UseStringDeduplication -XX:+CompactStrings -XX:-DisableExplicitGC -XX:ActiveProcessorCount=-1 -XX:MinHeapFreeRatio=40 -XX:MaxHeapFreeRatio=70 -XX:GCTimeRatio=12
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	</pre>		</pre>

			or, if your JVM supports ShenandoahGC (see https://stackoverflow.com/a/69231190)
	<pre>		<pre>
	-Xms=16g -Xmx=16g -XX:+AlwaysPreTouch -XX:MaxGCPauseMillis=50 -Dlog4j.formatMsgNoLookups=true -XX:+UseShenandoahGC		-Xms=16g -Xmx=16g -XX:+AlwaysPreTouch -XX:MaxGCPauseMillis=50 -Dlog4j.formatMsgNoLookups=true -XX:+UseShenandoahGC
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	from https://docs.oracle.com/en/java/javase/17/gctuning/ergonomics.html#GUID-BC516CBE-700D-44DB-8485-3FD5CA9A411B		from https://docs.oracle.com/en/java/javase/17/gctuning/ergonomics.html#GUID-BC516CBE-700D-44DB-8485-3FD5CA9A411B

			<blockquote>
	The Java HotSpot VM garbage collectors can be configured to preferentially meet one of two goals: maximum pause-time and application throughput. If the preferred goal is met, the collectors will try to maximize the other.		The Java HotSpot VM garbage collectors can be configured to preferentially meet one of two goals: maximum pause-time and application throughput. If the preferred goal is met, the collectors will try to maximize the other.

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	Minimize Java heap size by lowering the values of the options -XX:MaxHeapFreeRatio (default value is 70%) and -XX:MinHeapFreeRatio (default value is 40%) with the command-line options -XX:MaxHeapFreeRatio and -XX:MinHeapFreeRatio. Lowering -XX:MaxHeapFreeRatio to as low as 10% and -XX:MinHeapFreeRatio has shown to successfully reduce the heap size without too much performance degradation...		Minimize Java heap size by lowering the values of the options -XX:MaxHeapFreeRatio (default value is 70%) and -XX:MinHeapFreeRatio (default value is 40%) with the command-line options -XX:MaxHeapFreeRatio and -XX:MinHeapFreeRatio. Lowering -XX:MaxHeapFreeRatio to as low as 10% and -XX:MinHeapFreeRatio has shown to successfully reduce the heap size without too much performance degradation...


	About using percentage, be aware of https://blog.arkey.fr/2020/10/27/maxrampercentage-is-not-what-i-wished-for/		About using percentage, be aware of https://blog.arkey.fr/2020/10/27/maxrampercentage-is-not-what-i-wished-for/
	Note (from the previous link), for any kind of java defaults, use the great Chris Newland tool https://chriswhocodes.com/hotspot_options_openjdk17.html		Note (from the previous link), for any kind of java defaults, use the great Chris Newland tool https://chriswhocodes.com/hotspot_options_openjdk17.html
			</blockquote>

	== Develop web apps ==		== Develop web apps ==

T1t0: /* Options */

2024-03-08T22:39:51Z

Options

@@ Line 7: / Line 7: @@
 Examples:
 <pre>
--XX:+UseContainerSupport -Xms64m -Xmx2g -XX:ActiveProcessorCount=2 -Dlog4j.formatMsgNoLookups=true -XX:+UseSerialGC
+-XX:+UseContainerSupport -XX:-UseStringDeduplication -XX:+CompactStrings -XX:-DisableExplicitGC -XX:ActiveProcessorCount=-1 -XX:MinHeapFreeRatio=40 -XX:MaxHeapFreeRatio=70 -XX:GCTimeRatio=12
 </pre>
 <pre>
--server -Xms=16g -Xmx=16g -XX:+UseLargePages -XX:+UseG1GC -XX:InitiatingHeapOccupancyPercent=70 -XX:MaxGCPauseMillis=30 -XX:+DisableExplicitGC -XX:G1HeapWastePercent=25
+ -XX:ActiveProcessorCount=2 -XX:+UseStringDeduplication -XX:MinHeapFreeRatio=20 -XX:MaxHeapFreeRatio=35 -XX:GCTimeRatio=24 -Dlog4j.formatMsgNoLookups=true -XX:+UseSerialGC
 </pre>
 * [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#advanced-garbage-collection-options-for-java Advanced garbage collection options]
@@ Line 23: / Line 33: @@
 * [https://wiki.openjdk.org/display/shenandoah/Main#Main-Basicconfiguration Shenandoah GC - OpenJDK Wiki]
 * [https://stackoverflow.com/a/27953779 about String Deduplication]
 == Develop web apps ==

T1t0: /* Options */

2024-02-13T11:39:47Z

Options

← Older revision		Revision as of 11:39, 13 February 2024
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	== Options ==		== Options ==

	~~Example~~:		Examples:

			<pre>
			-XX:+UseContainerSupport -Xms64m -Xmx2g -XX:ActiveProcessorCount=2 -Dlog4j.formatMsgNoLookups=true -XX:+UseSerialGC
			</pre>

	<pre>		<pre>
	-server -Xms=16g -Xmx=16g -XX:+UseLargePages -XX:+UseG1GC -XX:InitiatingHeapOccupancyPercent=70 -XX:MaxGCPauseMillis=30 -XX:+DisableExplicitGC -XX:G1HeapWastePercent=25		-server -Xms=16g -Xmx=16g -XX:+UseLargePages -XX:+UseG1GC -XX:InitiatingHeapOccupancyPercent=70 -XX:MaxGCPauseMillis=30 -XX:+DisableExplicitGC -XX:G1HeapWastePercent=25
	</pre>		</pre>


	* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#advanced-garbage-collection-options-for-java Advanced garbage collection options]		* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#advanced-garbage-collection-options-for-java Advanced garbage collection options]
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	* [https://www.oracle.com/technical-resources/articles/java/g1gc.html#Imp Important Defaults]		* [https://www.oracle.com/technical-resources/articles/java/g1gc.html#Imp Important Defaults]
	* [https://access.redhat.com/documentation/en-us/red_hat_data_grid/7.2/html/performance_tuning_guide/java_virtual_machine_settings#jvm_example_configurations JVM Example Configurations]		* [https://access.redhat.com/documentation/en-us/red_hat_data_grid/7.2/html/performance_tuning_guide/java_virtual_machine_settings#jvm_example_configurations JVM Example Configurations]
			* [https://developers.redhat.com/articles/2021/11/02/how-choose-best-java-garbage-collector#serial_collector Compare Java garbage collectors \| Red Hat Developer]
			* [https://wiki.openjdk.org/display/shenandoah/Main#Main-Basicconfiguration Shenandoah GC - OpenJDK Wiki]
			* [https://stackoverflow.com/a/27953779 about String Deduplication]

	== Develop web apps ==		== Develop web apps ==

T1t0: /* Links */

2023-09-22T08:01:14Z

Links

← Older revision		Revision as of 08:01, 22 September 2023
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	* [http://jwma.sourceforge.net/index.html jwma [Home]]		* [http://jwma.sourceforge.net/index.html jwma [Home]]
	* [http://yawebmail.sourceforge.net/faq.html#system-requirements yawebmail - Frequently Asked Questions]		* [http://yawebmail.sourceforge.net/faq.html#system-requirements yawebmail - Frequently Asked Questions]

	~~== About Struts framework ==~~

	* [http://unnisworld.wordpress.com/2008/02/14/struts-tip-how-to-organize-related-operations-into-a-single-action-class/ Struts Tip : How to build Multi-Event Actions? « Nightly Builds]
	* [http://www.allapplabs.com/struts/struts_example.htm Struts Example]
	* [http://www.java2s.com/Code/Java/J2EE/StrutsFrameworkASampleStrutsApplication.htm Struts Framework: A Sample Struts Application : Struts « J2EE « Java]
	* [http://exadel.com/tutorial/struts/5.2/guess/strutstutorial-dynaform.html Struts Tutorial: Modifying an Application to Use DynaActionForms]

	== About Multiple Forms ==		== About Multiple Forms ==

T1t0 at 07:59, 22 September 2023

2023-09-22T07:59:30Z

@@ Line 15: / Line 15: @@
 * [https://access.redhat.com/documentation/en-us/red_hat_data_grid/7.2/html/performance_tuning_guide/java_virtual_machine_settings#jvm_example_configurations JVM Example Configurations]
-== Web ==
 === Example SpringBoot app ===
@@ Line 719: / Line 720: @@
 mvn clean generate-sources
 </pre>
 [[category:develop]]
 [[category:java]]

T1t0: /* Options */

2023-03-25T17:01:52Z

Options

← Older revision		Revision as of 17:01, 25 March 2023
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	== Options ==		== Options ==

			Example:
			<pre>
			-server -Xms=16g -Xmx=16g -XX:+UseLargePages -XX:+UseG1GC -XX:InitiatingHeapOccupancyPercent=70 -XX:MaxGCPauseMillis=30 -XX:+DisableExplicitGC -XX:G1HeapWastePercent=25
			</pre>

	* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#advanced-garbage-collection-options-for-java Advanced garbage collection options]		* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#advanced-garbage-collection-options-for-java Advanced garbage collection options]
	* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#performance-tuning-examples Performance tuning examples]		* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#performance-tuning-examples Performance tuning examples]
			* [https://www.oracle.com/technical-resources/articles/java/g1gc.html#Imp Important Defaults]
			* [https://access.redhat.com/documentation/en-us/red_hat_data_grid/7.2/html/performance_tuning_guide/java_virtual_machine_settings#jvm_example_configurations JVM Example Configurations]

	== Web ==		== Web ==

T1t0 at 22:41, 6 March 2023

2023-03-06T22:41:43Z

← Older revision		Revision as of 22:41, 6 March 2023
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	See [[Maven_(Application)\|Maven build automation tool]] to setup a java project.		See [[Maven_(Application)\|Maven build automation tool]] to setup a java project.

			== Options ==

			* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#advanced-garbage-collection-options-for-java Advanced garbage collection options]
			* [https://docs.oracle.com/en/java/javase/15/docs/specs/man/java.html#performance-tuning-examples Performance tuning examples]

	== Web ==		== Web ==

T1t0: /* WSDL/SOAP */

2022-06-22T23:09:17Z

WSDL/SOAP

← Older revision		Revision as of 23:09, 22 June 2022
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	* http://www.dneonline.com/calculator.asmx?wsdl (simple test service)		* http://www.dneonline.com/calculator.asmx?wsdl (simple test service)
			* https://www.dataaccess.com/webservicesserver/numberconversion.wso?WSDL (simple test service)
	* https://www.ebi.ac.uk/chebi/webServices.do (real web service)		* https://www.ebi.ac.uk/chebi/webServices.do (real web service)
			* https://europepmc.org/SoapWebServices (real web service)

	So get the WSDL definition you prefer and save it in a service.wsdl file, we will use it.		So get the WSDL definition you prefer and save it in a service.wsdl file, we will use it.

T1t0: /* Using org.codehaus.mojo jaxws-maven-plugin */

2022-06-22T23:08:12Z

Using org.codehaus.mojo jaxws-maven-plugin

← Older revision		Revision as of 23:08, 22 June 2022
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	<configuration>		<configuration>
	<wsdlFiles>		<wsdlFiles>
	<wsdlFile>${basedir}/src/main/resources/service.wsdl</wsdlFile>		<wsdlFile>${project.basedir}/src/main/resources/service.wsdl</wsdlFile>
	</wsdlFiles>		</wsdlFiles>
			<wsdlLocation>https://YOUR_WSDL_URL?WSDL</wsdlLocation>
	<keep>true</keep>		<keep>true</keep>
			<genJWS>false</genJWS>
	<packageName>org.example.adapter.soap.generated</packageName>		<packageName>org.example.adapter.soap.generated</packageName>
	<sourceDestDir>src/main/java</sourceDestDir>		<sourceDestDir>src/main/java</sourceDestDir>