Liferay startup takes way too long

倖福魔咒の 提交于 2019-12-04 02:43:18

The comments already gave some hints. I'd say, the most important issue is to check if virtual memory (paging) is used - as soon as the OS has to page memory to disk, you have lost: There's a potentially huge performance hit.

When you upgrade your memory (e.g. if you hit the virtual memory) you might want to consider upgrading the OS to a 64bit OS - 32bit can only address 4G and you might hit limits with appserver memory as each process can only get a limited amount of memory.

You could also test if Liferay starts up faster before you run so many other applications - this is another hint that you're running into a memory issue.

The SSD option will further accelerate your system, but for a much higher price than RAM. Also, virtual memory on SSD is not really recommended - it will wear out the drive quicker. And instead of using virtual memory on SSD, rather don't use virtual memory - this will be quicker AND cheaper.

This problem is solved by upgrading to Liferay 7.

While Liferay 7 does not start faster, developers really never need to restart it, as everything can be overridden by deploying new OSGi components. That is actually the biggest difference between Liferay 6 and Liferay 7.

I have been developing for Liferay 7 for 3 months, including very deep customization (for instance intercepting all file reads for audit), and have never needed to restart the Liferay server.

The server speed depends so much on a well configured JVM (memory, garbage collector type, etc) and Tomcat connector thread pool. depending of available server resources. Liferay provide a recommended configuration:

`-server -XX:NewSize=1024m -XX:MaxNewSize=1024m -Xms4096m
-Xmx4096m -XX:MetaspaceSize=300m -XX:MaxMetaspaceSize=300m
-XX:SurvivorRatio=12 –XX:TargetSurvivorRatio=90 –
XX:MaxTenuringThreshold=15 -XX:+UseLargePages
-XX:LargePageSizeInBytes=256m -XX:+UseParNewGC
-XX:ParallelGCThreads=16 -XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled -XX:+CMSCompactWhenClearAllSoftRefs
-XX:CMSInitiatingOccupancyFraction=85 -XX:+CMSScavengeBeforeRemark
-XX:+UseLargePages -XX:LargePageSizeInBytes=256m
-XX:+UseCompressedOops -XX:+DisableExplicitGC -XX:-UseBiasedLocking
-XX:+BindGCTaskThreadsToCPUs -XX:+UseFastAccessorMethods
-XX:InitialCodeCacheSize=32m -XX:ReservedCodeCacheSize=96m`

The above JVM settings should formulate a starting point for your performance tuning. Each system’s final parameters will vary due to a variety of factors including number of current users and transaction speed.

In tomcat servers you define this configuration like CATALINA_OPTS environment variable in /[tomcat_server]/bin/setenv.[sh or bat] file.

易学教程内所有资源均来自网络或用户发布的内容,如有违反法律规定的内容欢迎反馈
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!