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Sumit,

On 7/12/19 08:30, Sumit Bhardwaj wrote:
> Hi,
> 
> We are using tomcat 9.0.14,and we are running some performance
> tests for our application.
> 
> What we have observed is that 1- CPU usage of tomcat is less than
> 10%, when using tomcat without SSL for a week. 2. CPU Usage is
> around 20%  and it keeps growing after a day to 40% and keeps
> increasing when we use the tomcat in SSL mode
> 
> Connector configuration for HTTP and HTTPS are as
> 
> *<Connector port="8080" protocol="HTTP/1.1"* *
> connectionTimeout="20000"*
> 
> *               />*
> 
> 
> <Connector port="8443" 
> protocol="org.apache.coyote.http11.Http11NioProtocol" 
> maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
> sslProtocol="TLS1.2" keystoreFile="keystore"
> keystorePass="changeme" />
> 
> 
> Do we need any more configuration or any thing else so that CPU
> usage is under control.

Are you using JSSE or OpenSSL for crypto?

How are you measuring CPU usage?

Have you tried to correlate that CPU usage with user-request load?

Encryption isn't free, though modern CPUs are very good at optimizing it
.

- -chris
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