Lucas,
On 3/21/2019 6:57 AM, Lucas Bovetto wrote:
Hello,
I whould like to get a support to a problem that has been happening.
I have scenario that my tomcat stay in 100% cpu usage even though no
one access, and when it happening nobody can accesses tomcat.
Configuration:
O.S: Windows Server 2008
Tomcat: 8.5
Japa Options:
-XX:+UseParNewGC
-XX:+OptimizeStringConcat
-XX:NewSize=1G
-XX:+CMSParallelRemarkEnabled
-XX:+UnlockDiagnosticVMOptions
-XX:-DisableExplicitGC
-XX:SoftRefLRUPolicyMSPerMB=1
-XX:SurvivorRatio=20
-Djava.awt.headless=true
-Djava.net.preferIPv4Stack=true
-XX:MaxPermSize=512m
-XX:+UseTLAB
-XX:MaxTenuringThreshold=0
We need more information before we can help:
What version of Java are you using?
Can you issue a Thread Dump?
How much RAM does the Tomcat process take when the issue happens? How
much physical RAM does the machine have?
Did you set all of these -XX options after research and conclusion that
they are optimal for your setup or did you just copy and paste them from
a random post?
For example, if you are running Java 8 then the MaxPermSize is ignored
because PermGen was replaced with MetaSpace. You also set explicitly
the NewSize and the SurvivorRatio and at first glance, without knowing
anything about your setup, the values don't seem right to me.
Igal
Att,
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*Lucas Henrique Bovetto*
*Gerente de Desenvolvimento*
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