[Performance Tuning] - Re: How to confirm JVM Settings
Radoslav Husar <[email protected]> Wed, 21 Aug 2013 04:08:36 -0400
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Radoslav Husar [https://community.jboss.org/people/rhusar] created the disc=
ussion
"Re: How to confirm JVM Settings"
To view the discussion, visit: https://community.jboss.org/message/833318#8=
33318
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No, you are not.=20
java -XshowSettings:all will start a new process and output infomation abou=
t that process. You would need to add that to JAVA_OPTS to be helpful. It w=
ill print out settings when you server starts.
But I usually just look at what the process has been started with:
[rhusar@rhusar wildfly-8.0.0.Beta1-SNAPSHOT]$ ps xafu | grep java
rhusar=C2=A0=C2=A0 17974=C2=A0 147=C2=A0 2.5 3181648 204168 pts/3=C2=A0 Sl+=
=C2=A0 10:05=C2=A0=C2=A0 0:07=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \=
_ /usr/java/latest/bin/java -D[Standalone] -server -XX:+UseCompressedOops -=
Xms64m -Xmx512m -XX:MaxPermSize=3D256m -Djava.net.preferIPv4Stack=3Dtrue -D=
jboss.modules.system.pkgs=3Dorg.jboss.byteman -Djava.awt.headless=3Dtrue -D=
org.jboss.boot.log.file=3D/home/rhusar/as/build/target/wildfly-8.0.0.Beta1-=
SNAPSHOT/standalone/log/server.log -Dlogging.configuration=3Dfile:/home/rhu=
sar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/standalone/configuration/l=
ogging.properties -jar /home/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNA=
PSHOT/jboss-modules.jar -mp /home/rhusar/as/build/target/wildfly-8.0.0.Beta=
1-SNAPSHOT/modules org.jboss.as.standalone -Djboss.home.dir=3D/home/rhusar/=
as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT -Djboss.server.base.dir=3D/hom=
e/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/standalone -c standal=
one-ha.xml
...and I see the options kicked in.
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Re: How to confirm JVM Settings
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<span style="margin-bottom: 10px;">
created by <a href="https://community.jboss.org/people/rhusar">Radoslav Husar</a> in <i>Performance Tuning</i> - <a href="https://community.jboss.org/message/833318#833318">View the full discussion</a>
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<div class="jive-rendered-content"><p>No, you are not. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: 'courier new', courier;">java -XshowSettings:all </span>will start a new process and output infomation about that process. You would need to add that to JAVA_OPTS to be helpful. It will print out settings when you server starts.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But I usually just look at what the process has been started with:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">[rhusar@rhusar wildfly-8.0.0.Beta1-SNAPSHOT]$ ps xafu | grep java
rhusar   17974  147  2.5 3181648 204168 pts/3  Sl+  10:05   0:07  |       \_ /usr/java/latest/bin/java -D[Standalone] -server -XX:+UseCompressedOops -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -Dorg.jboss.boot.log.file=/home/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/standalone/log/server.log -Dlogging.configuration=file:/home/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/standalone/configuration/logging.properties -jar /home/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/jboss-modules.jar -mp /home/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/modules org.jboss.as.standalone -Djboss.home.dir=/h
ome/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT -Djboss.server.base.dir=/home/rhusar/as/build/target/wildfly-8.0.0.Beta1-SNAPSHOT/standalone -c standalone-ha.xml
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>...and I see the options kicked in.</p></div>
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