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因此,盲目地使用懒加载只会让程序的性能变差。服务调用整合用户画像和推荐结果两部分数据,向外提供推荐调用的接口。我们都知道transient是Java语言中的一个关键字,它并非为JPA而设计。依赖数据库连接池的任务,因为线程提交SQL后需要等待数据库返回结果,如果等待的时间越长CPU空闲时间就越长,那么线程数应该设置越大,这样才能更好的利用CPU。附linux添加tomcat服务在/etc/init.d中输入sudovimtomcat脚本具体内容如下:#!/bin/bash?#chkconfig:23451090?#description:StartsandStopsthetomcatdaemon?#editedbyZZH:2015-10-14??CATALINA_HOME=/users/shr/apache-tomcat-7.0.64?JAVA_HOME=/users/shr/util/JavaDir/jdk?exportCATALINA_HOME?exportJAVA_HOME??start_tomcat=$CATALINA_HOME/bin/startup.sh?stop_tomcat=$CATALINA_HOME/bin/shutdown.sh??if[!-f$CATALINA_HOME/bin/catalina.sh]?then??????echo"===Tomcatisnotavailable.==="??????exit?fi??start()?{??????echo-n"===Startingtomcat===:"??????${start_tomcat}??????echo"===tomcatstartok.==="?}??stop()?{??????echo-n"===Shuttingdowntomcat===:"??????${stop_tomcat}??????echo"===tomcatstopok.==="?}??status()?{??????psax--width=1000|grep"org.apache.catalina.startup.Bootstrapstart"|grep-v"grep"|awk'{printf""}'|wc|awk'{print}'>tomcat_process_count.txt??????readline?????rmtomcat_process_count.txt??????if[$line-gt0]???????????then???????????????echo-n"tomcat(pid="???????????????psax--width=1000|grep"org.apache.catalina.startup.Bootstrapstart"|grep-v"grep"|awk'{printf""}'|awk'{print}'>tomcat_process_pid.txt???????????????readpid??????????????rmtomcat_process_pid.txt???????????????echo-n$pid???????????????echo-n")isrunning..."???????????????echo???????????else???????????????echo"tomcatisstopped"??????fi?}??case""in??????start)???????????start???????????;;??????stop)???????????stop???????????;;??????restart)???????????stop???????????sleep1???????????start???????????;;??????status)???????????status???????????;;??????*)???????????echo"Usage: