Reference
How to speed up Tomcat launch
set startStopThreads="0" in conf/server.xml
- before
sever.xml
<Engine name="Catalina" defaultHost="localhost">
...
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
- after
sever.xml
<Engine name="Catalina" defaultHost="localhost" startStopThreads="0">
...
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true" startStopThreads="0">
Before
StartStop-1 single thread
catalina.log
18-Jan-2018 17:36:50.808 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor [/etc/tomcat/Catalina/localhost/examples.xml]
18-Jan-2018 17:36:51.698 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat/Catalina/localhost/examples.xml] has finished in [889] ms
18-Jan-2018 17:36:57.855 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor [/etc/tomcat/Catalina/localhost/manager.xml]
18-Jan-2018 17:36:58.239 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat/Catalina/localhost/manager.xml] has finished in [384] ms
18-Jan-2018 17:36:58.239 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor [/etc/tomcat/Catalina/localhost/host-manager.xml]
18-Jan-2018 17:36:58.531 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat/Catalina/localhost/host-manager.xml] has finished in [292] ms
After
StartStop-1,2,3,4 multiple threads = 4 CPUs
catalina.log
19-Jan-2018 14:37:39.768 INFO [localhost-startStop-3] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor [/etc/tomcat/Catalina/localhost/manager.xml]
19-Jan-2018 14:37:39.768 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor [/etc/tomcat/Catalina/localhost/examples.xml]
19-Jan-2018 14:37:39.769 INFO [localhost-startStop-4] org.apache.catalina.startup.HostConfig.deployDescriptor Deploying configuration descriptor [/etc/tomcat/Catalina/localhost/host-manager.xml]
19-Jan-2018 14:37:41.130 INFO [localhost-startStop-3] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat/Catalina/localhost/manager.xml] has finished in [1,362] ms
19-Jan-2018 14:37:41.192 INFO [localhost-startStop-4] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat/Catalina/localhost/host-manager.xml] has finished in [1,423] ms
19-Jan-2018 14:37:41.282 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat/Catalina/localhost/examples.xml] has finished in [1,514] ms
Hummmm 