Recently, I had noticed that my net speed had become slower. In the network statistics of System Monitor the correct speed was shown. I used tools like nethogs to investigate which process had so much usage. It wasn't of much help because the processes which showed up were taking up nearly nothing of my speed.
Suddenly it occurred to me that a couple of weeks ago I had observed the java process hogging a lot of my cpu. I thought it might even change the fate of my net speed if I stopped it. So I went ahead and did that. Surprisingly, my speed returned to normal and my computer is still behaving normally.
root@saurabh-ubuntu:/home/saurabh# ps aux | grep java tomcat7 1546 0.2 1.4 1915288 44708 ? Sl 12:05 0:11 /usr/lib/jvm/default-java/bin/java -Djava.util.logging.config.file=/var/lib/tomcat7/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.awt.headless=true -Xmx128m -XX:+UseConcMarkSweepGC -Djava.endorsed.dirs=/usr/share/tomcat7/endorsed -classpath /usr/share/tomcat7/bin/bootstrap.jar:/usr/share/tomcat7/bin/tomcat-juli.jar -Dcatalina.base=/var/lib/tomcat7 -Dcatalina.home=/usr/share/tomcat7 -Djava.io.tmpdir=/tmp/tomcat7-tomcat7-tmp org.apache.catalina.startup.Bootstrap start saurabh 14757 222 23.2 3481076 700356 ? SNl 13:19 6:09 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java -Dnetworkaddress.cache.ttl=0 -Dnetworkaddress.cache.negative.ttl=0 -Djava.net.preferIPv4Stack=true -Xms60m -Xmx512m -Djava.library.path=lib -classpath wrapper.jar:bcprov-jdk15on-151.jar:freenet-ext.jar:freenet.jar -Dwrapper.key=liPhWRMzGh3wcYvE -Dwrapper.backend=pipe -Dwrapper.disable_console_input=TRUE -Dwrapper.pid=1298 -Dwrapper.version=3.5.20 -Dwrapper.native_library=wrapper -Dwrapper.arch=x86 -Dwrapper.ignore_signals=TRUE -Dwrapper.service=TRUE -Dwrapper.cpu.timeout=10 -Dwrapper.jvmid=3 freenet.node.NodeStarter freenet.ini root 16561 0.0 0.0 16896 928 pts/1 S+ 13:22 0:00 grep --color=auto java
I don't know much about this, but stopping the java process would not make something not work I hope? If yes, then how can I stop it from appearing again?
EDIT: If I end or kill that process, it starts again. Only if I stop it it stays stopped.