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  • {"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":4,"count":4}]},"card":[{"des":"阿里云数据库专家保驾护航,为用户的数据库应用系统进行性能和风险评估,参与配合进行...

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  • 检查线程池是不是太小,存在线程等待过多查看tomcat的PIDps -aux|grep tomcat查看tomcat对应的线程数ps -Lf PID|wc -l修改tomcat线程池数以及tomcat运行模式(maxThreads:tomcat起动的最大线程数,即同时处理的任务...

    1.检查内存是否溢出

    free -h

    若内存溢出,首先检查代码是否存在内存泄漏 ,其次就是扩容

    2.检查线程池是不是太小,存在线程等待过多

    查看tomcat的PID

    ps -aux|grep tomcat

    查看tomcat对应的线程数

    ps -Lf PID|wc -l

    修改tomcat线程池数以及tomcat运行模式(maxThreads:tomcat起动的最大线程数,即同时处理的任务个数,默认值为200 acceptCount:当tomcat起动的线程数达到最大 时,接受排队的请求个数,默认值为100)

    在linux上,默认使用的是bio connector。与nio相比,bio性能较低。将/conf/server.xml中的如下配置片段:

    修改为:

    就可将http connector切换至nio了。

    更多细节请参考:http://www.365mini.com/page/tomcat-connector-mode.htm

    http://blog.csdn.net/wngua/article/details/70904991

    https://www.cnblogs.com/tyb1222/p/4583983.html

    https://www.cnblogs.com/magmell/p/7086229.html

    以上就是tomcat响应过慢——解决办法的全部内容。

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  • TOMCAT的内存和连接数配置详解:如果是使用的catalina.sh(linux)或Catalina.bat(win)启动的:修改这两个文件,加上下面这句:SET CATALINA_OPTS= -Xms64m -Xmx128m如果使用的winnt服务启动:打开C:WINNTsystem32...

    TOMCAT的内存和连接数配置详解:

    如果是使用的catalina.sh(linux)或Catalina.bat(win)启动的:

    修改这两个文件,加上下面这句:

    SET CATALINA_OPTS= -Xms64m -Xmx128m

    如果使用的winnt服务启动:

    打开C:WINNTsystem32regedt32.exe,在 HKEY_LOCAL_MACHINE-->SOFTWARE-->Apache Software Foundation-->Process Runner 1.0-->Tomcat5-->Parameters

    修改属性:

    -Xms64m

    -Xmx128m

    有人建议Xms和Xmx的值取成一样比较好,说是可以加快内存回收速度。

    但未经本人验证过。有兴趣可以试试。

    加大tomcat连接数:

    在tomcat配置文件server.xml中的配置中,和连接数相关的参数有:

    minProcessors:最小空闲连接线程数,用于提高系统处理性能,默认值为10

    maxProcessors:最大连接线程数,即:并发处理的最大请求数,默认值为75

    acceptCount:允许的最大连接数,应大于等于maxProcessors,默认值为100

    enableLookups:是否反查域名,取值为:true或false。为了提高处理能力,应设置为false

    connectionTimeout:网络连接超时,单位:毫秒。设置为0表示永不超时,这样设置有隐患的。通常可设置为30000毫秒。

    其中和最大连接数相关的参数为maxProcessors和acceptCount。如果要加大并发连接数,应同时加大这两个参数。

    web server允许的最大连接数还受制于操作系统的内核参数设置,通常Windows是2000个左右,Linux是1000个左右。

    我们这个服务器的内存是2G的,TOMCAT下面跑了5个应用,压力比较大,所以把TOMCAT的内存调高到最小512M,最大1G,

    echo "Using CATALINA_BASE:   $CATALINA_BASE"

    echo "Using CATALINA_HOME:   $CATALINA_HOME"

    echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"

    echo "Using JAVA_HOME:       $JAVA_HOME"

    以上行后面增加一行:

    set CATALINA_OPTS="$CATALINA_OPTS -Xms512m -Xmx1024m $JPDA_OPTS"

    注:以上均来自互联网所看到的一些东西的整合。。。

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  • {"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":6,"count":6}]},"card":[{"des":"云服务器 ECS(Elastic Compute Service)是一种弹性可伸缩的计算服务,助您降低 IT ...

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  • Tomcat相关的系统架构,...另外,在面试的时候你还要有意识无意识的往Tomcat这个地方引,就比如说常见的Spring MVC的执行流程,一个URL的完整调用链路,这些相关的题目你是可以再往Tomcat处理请求的这个过程去说的!...
  • 可以vim conf/server.xml,在# OS specific support...下添加:JAVA_OPTS="-server -Xms1024m -Xmx6144m -Xss1024K"这段命令主要是用来设置Tomcat运行内存大小,Tomcat是内存大户,根据项目需求具体设定。vim server...
  • 引子Tomcat如何配置和优化,并不是每个工程师都需要掌握的内容。但如果你想成为一个架构师,就必须要学会本文的人内容了。在conf目录下存放着Tomcat的所有配置文件,而server.xml是其中最为重要的一个,server.xml的...
  • web 项目 tomcat 引起 请求相应 问题

    千次阅读 2019-07-30 17:34:08
    刚进公司 配置完开发环境,启动项目发现 请求接口一直很 F12 中查看 timing 总有请求或静态资源 stalled 和 content download 非常的 百度了一下午,各种尝试 1.刚开始怀疑网路有问题。但是发现下载速度什么的...
  • 1、环境说明Linux下tomcat运行期2、增加jvm 内存的配置#vi catalina.sh插入如下:JAVA_OPTS='-Xms256m -Xmx512m'3、INFO: Maximum number of threads (200) created for connector with address null and port 11222...
  • apache死机,apache无法连接tomcat,查看apache的log,errorlog; ... 如果资源文件很多,每个用户的请求会导致产生x100个的js和图片请求,也会消耗tomcat和apache的连接数,如果用户带宽也会...
  • NGINX+TOMCAT动静分离

    2020-07-07 17:01:17
    因为 Tomcat 处理静态资源的速度比较,所以可以考虑把所有静态资源独立开来,交给处理静态资源更快的服务器(例如 Nginx)处理,而把动态请求交给 Tomcat 处理。 在机器上同时安装了 Nginx 和 Tomcat,把所有的...
  • Nginx+Tomcat动静分离

    2019-11-28 16:21:44
    Nginx+Tomcat 为什么动静分离? 因为NGINX处理静态页面的效率远远高于Tomcat的处理能力(大概处理能力比值在6:1左右);同时动态资源和静态资源分开,...因为tomcat处理静态资源的速度比较,所以我们可以考虑...
  • 特别对于门户网站这样的项目,静态内容资源会更多,我们使用一般的 Tomcat 部署时,Tomcat 对静态资源的处理能力比较,至少比 Apache 要很多。 为了提高项目的访问速度,降低服务器负载提高性能,我们使用Apache...
  • 因为tomcat处理静态资源的速度比较,所以我们可以考虑把所有静态资源独立开来,交给处理静态资源更快的服务器例如nginx处理,而把动态请求交给tomcat处理。 在机器上同时安装了nginx和tomcat,把所有的静态资源都...
  • 特别对于门户网站这样的项目,静态内容资源会更多,我们使用一般的 Tomcat 部署时,Tomcat 对静态资源的处理能力比较,至少比 Apache 要很多。 为了提高项目的访问速度,降低服务器负载提高性能,我们使用Apache...
  • tomcat常用于提供servlet/jsp容器服务,简单方便、使用高效。...因此,如果以“使用tomcat提供servlet/jsp容器服务”为前提,又希望使其中的静态文件资源请求性能好一点时,就要用到“tomcat中的ajp”...
  •   处理静态资源的速度比较,所以我们可以考虑把所有静态资源独立开来,交给处理静态资源更快的服务器例如nginx处理,而把动态请求交给tomcat处理。   如下图所示,我们在机器上同时安装了nginx和tomcat...
  • tomcat启用gzip压缩

    2017-02-21 11:40:26
    原理是,在客户端请求服务器对应资源后,从服务器端将资源文件压缩,再输出到客户端,由客户端的浏览器负责解压缩并浏览。相对于普通的浏览过程HTML ,CSS,Javascript , Text ,它可以节省流量。更为重要的是,它可以...
  • 为什么动静分离? 因为NGINX处理静态页面的效率远远高于Tomcat的处理能力(大概处理能力比值在6:1左右);...因为tomcat处理静态资源的速度比较,所以我们可以考虑把所有静态资源独立开来,交...
  • Nginx + Tomcat 负载均衡

    2017-12-14 16:52:00
    负载均衡的目的是为了解决单个节点服务器压力过大,造成Web响应...有了集群还要合理分配请求,不可能搭建了集群后所有的请求都发送到一台机器上,这显然是不合理的,也是对服务器资源的严重浪费.如何将用户的请求合理分...
  • 只不过请求的头或者请求体的内容特别长,发送速度有特别,这样每一个连接占用的时间就会变得特别长,攻击者会在短时间内持续不断的对服务器进行http请求,很快便会耗尽服务端的资源,从而令服务端拒绝服务。...
  • 数据库 mysql,用的james作为邮件服务器,下载附件的过程是 从james服务器获得输入流 从而把资源下载到tomcat里面,但是很,而且控制台或者tomcat的窗口打印了很多信息, 请求帮助
  • 背景目前的网关是基于Spring Boot 1.5.x和Tomcat 8.5.x构建,采用多线程阻塞模型,也就是说每个请求都会占用一个独立的线程资源,而线程在JVM中是一个相对比较重的资源。当应用是CPU密集型的或者说依赖的远程服务都...
  • 原先做前端开发时都是用tomcat,测试自己的前端代码, ...先安装NodeJs、npm(自带),国外的镜像资源访问的话,可以考虑使用taobao的资源,用npm安装nrm来管理registry的路径,比较常用的是taobao,也可...
  • 如何让资源服务器支持断点续传

    千次阅读 2019-03-05 10:41:18
    项目里有大量的音频及图片资源,存储在服务器上,用iis做的web服务器,发现访问倒时没问题,但对于大文件来说非常,通过查找发现是iis服务器不支持断点续传所致。 问题分析如下: 把资源地址在浏览器打开,并...
  • 原因是静态资源跟动态的请求一样也放在微服务中,也要通过向tomcat发送请求获取,这样光静态资源请求就占用tomcat很大一部分线程资源,这样就会导致吞吐量急剧的下降 那么我们要使得静态资源快速获取返回,要做...
  • 06.Nginx动静分离

    2020-11-08 01:15:49
    ????1.nginx动静分离 1.1 什么是动静分离 1.什么是动静分离? 简单来说就是将动态请求和静态请求分开处理。... 那么借助Nginx实现动态资源请求和静态资源请求分离后,可 以减少系统不必要的消耗和延时。以便加快系统的
  • tomcat为什么并发数少?因为,为什么? 1、首先因为tomcat是基于7层应用的,也就意味着一次请求...2、tomcat是跑在JVM中的,也就意味着一次请求从内核到用户程序,然后又要到JVM的虚拟程序中,所以tomcat!...
  • Nginx

    2021-03-08 13:33:00
    一、Nginx介绍 1、Nginx是什么、适用场景...  不分离会变  静态资源无需经过Tomcat,Tomcat只负责处理动态请求  例如:访问后缀为gif的资源时,Nginx会直接获取到当前请求的文件并返回  静态资源服务器 6、Nginx...

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