Tomcat max connections max-connections – Maximum number of connections that the server accepts and processes at any given time. Below are the ways we can tune Apache Tomcat. Then, we will cover how to monitor Hikari Connection Pool properties using Spring Boot actuator. max-connections = 10000 server. xml - check maxConnections: The maximum number of connections that the server will accept and process at any given time. max-connections关注的是Tomcat服务器能够处理的连接总数，而server. max-connections プロパティは、Spring Boot アプリケーションで組み込みの Tomcat サーバーを使用する場合に、同時に受け入れられる最大接続数を設定します。この設定は、アプリケーションのパフォーマンスと安定性に影響を与える重要な要素 Aug 20, 2019 · I have started my springboot application with following tomcat parameters -Dserver. Tomcat is a widely used Tomcat の設定を最適化するには、以下の手順が推奨されます。 Tomcatのスレッドプールの設定は、application. Apr 18, 2013 · I am having a web application which is load balanced on four servers. max-connections) will allow connections to arrive at the server and wait until a Tomcat thread becomes available to process the request. Here is an example: Application server method of pooling and sharing multiple connections to a database. jar 这个包中。 Nov 6, 2025 · Without configuring these attributes, the values returned would reflect the server name and port on which the connection from the proxy server was received, rather than the server name and port to whom the client directed the original request. The last one is start to used in 2. A particular instance of this component listens for connections on a specific TCP port number on the server. I have two questions: What happens if at a given moment number of connections exceed number of threads? What will happen to the connections that did not get a Oct 3, 2022 · Note: The APR/Native HTTP Connector is deprecated and will be removed in Tomcat 10. properties / application. May 27, 2025 · Spring Boot の server. max-threads, corePoolSize, and spring. Jun 16, 2018 · Max connections from an Apache Tomcat perspective is calculated based on a number of factors such as the number of simultaneous connections multiplied by the maximum execution time that each thread is capable of handling. 기본값은 100 이다. From Jira version 4. What is the difference between these two settings? What is a real world example scenario May 27, 2025 · The server. max关注的是能够并行处理请求的工作线程数。两者都是优化Tomcat服务器性能的重要参数，但关注点不同。合理配置这两个参数可以显著提高Tomcat服务器在高并发场景下的性能和稳定性。 ps: 以上配置的 Aug 7, 2023 · Database Connection With regards to DB connections, the Database max open connection defines how many connections Artifactory is going to forward to the Database to handle various operations. connection-timeout doesn't interfere, this settings (server. By the way, APR connector is used by tomcat. Tomcat uses the Jasper engine to convert JSP files into servlets, which are rendered into HTML pages for clients Jun 29, 2018 · The HTTP Connector element represents a Connector component that supports the HTTP/1. 3. Since I have configured minimum of 3 spare threads and keepalive as 2 minutes, it should not go over 20 or I have increased the limits of max connection and max clients in both apache and tomcat. This is basically the processing queue which the request handling threads use to pick/steal work from. My question is: Should I lower the max-threads setting to 10 so that each request will always have a database connection available? Tomcatの最大同時接続数をどのように変更しますか？を分かりやすく解説。実践的な例とコード、注意点を含めて初心者にも理解できるよう説明します。 Oct 16, 2017 · server. When the Tomcat connection pool is full, the following methods can be considered: Increase the size of the connection pool: You can adjust the configuration file of Tomcat to increase the maximum number of connections in the connection pool. once the limit has been reached, the operating system may still accept connections based on the acceptCount setting. Dec 3, 2021 · 其次，也和tomcat的配置参数有关尤其是以下三个配置项：maxConnections、maxThreads、acceptCount。 1. Nov 6, 2025 · If still more simultaneous requests are received, Tomcat will accept new connections until the current number of connections reaches maxConnections. Learn how to set maximum connections in Tomcat for each context to optimize performance. hikari. Add the maxConnections attribute to the elements, which is used to set the maximum concurrent connection limit for Tomcat. SERVER_TOMCAT_MAX_CONNECTIONS: This property defines the maximum number of connections that can be handled concurrently by the Tomcat server. If maxConnections is reached, OS queues additional connections. max. Sep 10, 2024 · Then the client sends the HTTP requests. Any requests received when the queue is full will be refused. We are using NIO connector. Max threads = 200 # the maximum number of connections in Tomcat This tutorial provides a detailed guide on how to configure and optimize Tomcat connection pools in a Spring Boot application. properties` file to increase the maximum number of threads. Any requests received Jan 27, 2016 · I have 2 server AWS EC2 with each server is: CPU=2 RAM=15GB. One or more such Connectors can be configured as part of a single Learn how to set JDBC pool properties like maximum connections in Spring Boot using HikariCP, Tomcat JDBC, and Commons DBCP. Jun 17, 2024 · Photo by Melissa Askew on Unsplash 2. of Threads (Or Strandby thread) //Maximum no. Jun 4, 2024 · When configuring Apache Tomcat, understanding the parameters maxThreads and maxConnections is crucial for optimizing application performance. maxActive, but when I try to s Jan 16, 2024 · Tomcat是一个广泛使用的Java Servlet容器，用于提供Web应用程序的运行环境。在处理请求时，Tomcat使用了一些关键参数来控制其行为。其中，acceptCount、maxConnections和maxThreads是三个重要的参数，它们对Tomcat的性能和资源利用率有着显著的影响。下面我们将逐一解析这三个参数的含义和作用。 acceptCount Nov 6, 2023 · Tuning Apache Tomcat in Spring Boot involves optimizing its configuration and settings to achieve better performance and resource utilization for your specific application. Adjust connection pool settings if using a data source, such as HikariCP, with properties like `spring. of Connection allowed Beware if No. idle: the maximum number of idle database connections that Artifactory will hold (default is 10) In the database: Increasing the number of connections in the database itself is equally important and you should refer to the documentation for the database you are using. 기본값은 8192 이다. (I count tomcat threads with command ps -eLf | grep java |grep tomcat |wc -l) I have about 4 connections per minute, it is not more than 5 due to the nature of my application. In Spring Boot 1. Therefore I want tomcat to start minimum possible threads. I did some research and found from apache documentation that setting values to acceptCount, maxConnections and increasein Feb 26, 2012 · The tomcat connection pool has a setting called maxActive and a setting called maxIdle my questions are. max is crucial for performance optimization and effective resource management. HTTP/2 connectors use non-blocking I/O, only utilising a container thread from the thread pool when there is data to read and write. Calculate or check maximum connections allowed. Here are recommended settings: SpringBoot与TomCat、servlet、socket关系（TomCat启动流程） 文章介绍了TomCat中的NIO模式的工作流程，主要分为Acceptor、Poller、processor。 本文中使用的TomCat版本为9. c> StartServers 100 MinSpareServers 10 MaxSpareServers 10 ServerLimit 50000 MaxClients 50000 MaxRequestsPerChild 2000 </IfModule> //tomcat Feb 17, 2016 · What is the default value used for maximum connections on a postgres database with tomcat connection pooling using spring-boot? There is a property spring. max-connections + server. Thread Pools (Connectors and Executors) Setting Using NIO or APR Connectors JVM Aug 13, 2024 · This maximum idle time can be configured with the attribute connection_pool_timeout which is given in units of seconds. Connection pools are crucial for managing and reusing database connections, thus enhancing application performance. My guess is that configuration should be like this. We can override the default thread pool limit by modifying the Artifactory System YAML. Jun 14, 2024 · Solving Max Connections Exhausted issue in Tomcat JDBC Connection Pool In a high-traffic Java web application, database connection management is crucial for maintaining optimal performance. x onwards. But whenever we start the server, jmx export reports the value Jul 22, 2021 · Your application suffers from database connection pool exhaustion: since you have more working threads in Tomcat (100) than available connections in the connection pool (60), many threads need to wait for a connection to be available. Aug 22, 2024 · server. Last time I have promised you to take a look at more real life scenario regarding threads. It is used for managing database connections, allowing us to avoid creating a new database connection for every database operation in the software application. How can I limit the number of concurrent connections to this application in order to prevent more than a specific number of users from accessing Feb 25, 2024 · 文章浏览阅读2. accept-count 모든 작업 스레드가 사용 중일 때 Tomcat이 수용 가능한 상태에서 대기 중인 TCP 연결의 최대 수를 나타낸다. max-connections and server. Wondering how to increase the number of concurrent connections in tomcat 7. In earlier Jira versions, the database connection pool was handled purely through the Apache Tomcat application server running Jira. max-threads: 最大スレッド数。 デフォルトは 200 です。 May 4, 2024 · Connection Pooling As the name itself specifies that it’s a pool of connections. The HTTP Connector element represents a Connector component that supports the HTTP/1. Is it true? Feb 21, 2020 · 3. May 19, 2014 · Base on the requirement, I use websocket to communicate with the clients, but when many clients have connected to the server, new connection can't be established, I doubt the count of established connections has reached the maximum count. properties file. datasource. May 2, 2010 · Cool, Tomcat is able to handle more than 13,000 concurrent connections. When this number has been reached, the server will not accept any more connections until the number of connections falls below this value. max-connections May 3, 2016 · From Tomcat Documentation maxConnections When this number has been reached, the server will accept, but not process, one further connection. The most important factor might be the number of simultaneously connected clients at peak times. This article will explore the differences between maxThreads and maxConnections, focusing on their importance in both BIO May 27, 2025 · All of the properties you listed, starting with spring. However, while default configurations work for many scenarios, neglecting optimization can lead to performance bottlenecks as server load increases. Nov 5, 2025 · If still more simultaneous requests are received, Tomcat will accept new connections until the current number of connections reaches maxConnections. I understand that setting the maximum number of connections available in a connection pool should be the same as your maxThreads configured for your Tomcat server (which correlates to the number of Jun 4, 2025 · By configuring parameters like threads. In other words, the maximum number of simultaneous requests that can be handled. max-connections=250 is working fine. An instance of this component must be associated with an existing HTTP/1. If still more simultaneous requests are received, they are stacked up inside the server socket created by the Connector, up to the configured maximum (the value of the acceptCount attribute). Any further simultaneous requests will receive "connection refused" errors, until resources are available to process them. Connections are queued until a thread is free. Tomcat defaults the maximum number of DB connections in the pool - maxActive - to 8. Let's delve into the details provided on the Tomcat 7 documentation related Optimizing Tomcat's Default Connectors for Better Performance Apache Tomcat is one of the most popular open-source web servers and servlet containers, widely used for deploying Java applications. xml is set to 15000. When this number has been reached, the server will accept, but not process, one further connection. 4, Jira 's dbconfig. These two settings play significant roles in how Tomcat handles incoming requests, directly impacting scalability and efficiency. We should add one for Jetty, too. If it’s a tomcat thread, it will serve the HTTP request, else it serve the database request. maxActive, which corresponds to the setMaxActive() method in the Tomcat DataSource class. (The maximum queue length for incoming connection requests when all possible request processing threads are in use. threads. max-connections について server. These three servers connect to common database with max connections setup to 600. max우아한테크코스 레벨 4 강의 중, Tomcat의 accept-count, max-cennections, threads. max-connections=10000 # Maximum number of connections that the server accepts and processes at any given time. max -threads= 250 Starting with Boot 2. max-connections=4000 I want to monitor busy thread and busy connection siz Oct 2, 2021 · springboot Tomcat maximum number of threads and connections first look at the built-in Tomcat in springboot and how to configure these two parameters # add the following content to the configuration file #The maximum number of threads in Tomcat is 200 server. This represents the maximum amount of time the server will wait for the client to make their request after connecting before the connection is closed: Jul 18, 2024 · Optimizing the configuration of Tomcat in a Spring Boot application can help improve performance and resource utilization. 1 keep-alive/pipelining and HTTP/2 multiplexing multiple requests onto one connection this doesn't cut it. Quoting the accepted answer from a thread from StackOverflow which, even though it talks about a setup with Tomcat and Apache, applies here as well: You should consider the workload the servers might get. tomcat. Deinum suggested, and second - tweaking Tomcat and/or Spring, what my answer suggested? Oct 18, 2016 · What httpd conf settings do I need to change to increase the max number of concurrent connections for Apache? NOTE: I turned off KeepAlive since this is mainly an API server. The Catalina server represents the Tomcat architecture in its entirety, and provides an environment for running servlets. xml file to allow for more concurrent connections to the DB - perhaps 20. max-connections (default value 10000). 2k次，点赞10次，收藏17次。本文解释了SpringBoot中Tomcat的并发限制（最大为200），最大连接数计算方式（max-connections+accept-count），以及线程池的工作原理。特别指出，自定义线程池时，这些设置会被覆盖，如异步注解影响线程池参数。 Tomcat 10. ymlファイルで、以下のプロパティを設定することで調整できます。 server. 먼저 공식 문서에서는 위의 3개의 개념에 대해서 아래와 같이 설명하고 있습니다. 1で同時接続数（同時処理できるリクエスト数）の設定を変更するには、server. Aug 5, 2024 · Or, 2) first is tweaking server. properties file server. Our setting on server. Dec 30, 2017 · 上限を超えたコネクションはTCPレベルで『connection refused』になる ただしこの上限は実行環境へのヒントで、 無視される可能性もある ServerSocket Javadoc maxConnectionsを超えたリクエストが来た場合、Acceptorスレッドを止めて待つ 図解 動作確認 検証環境 Windows 10 Pro Jul 23, 2025 · The Tomcat Connection Pool in Spring Boot is a robust and high-performance database connection pool implemented based on the Apache Tomcat Project. This allows multiple SSL configurations to be associated with a single secure connector with the configuration used for any given connection determined by the host name requested by the client. here are the configuration details: //apache <IfModule prefork. 4. Understanding connection pools will help you efficiently manage database connections, reduce the overhead of connection creation, and improve the acceptCount — The maximum queue length for incoming connection requests to the given connector when all possible request processing threads are in use. Nov 6, 2025 · The Tomcat connection pool offers a few additional features over what most other pools let you do: initSQL - the ability to run an SQL statement exactly once, when the connection is created validationInterval - in addition to running validations on connections, avoid running them too frequently. You can configure multiple connectors per Tomcat instance, each running a different protocol such as AJP, HTTP, or HTTPS. 1 Tomcat的高效配置Tomcat的ma_server. This should be increased in our included server. maximumPoolSize`. tomcat. The default value is 100. Learn how to configure the default connection pool for Tomcat in Spring Boot, including setup, code examples, and common mistakes. max-connections=300 Dec 3, 2023 · 本文详细介绍了Tomcat的两个核心组件——Connector和Container，以及它们在处理HTTP请求时的不同协议（BIO、NIO和APR）。重点讲解了acceptCount、maxConnections和maxThreads参数的作用和如何根据应用需求进行设置，以提升Tomcat在高并发环境下的性能。 Nov 6, 2025 · The HTTP Upgrade Protocol element represents an Upgrade Protocol component that supports the HTTP/2 protocol. Step-by-step guide with expert tips and code examples. Dec 28, 2023 · The default value is 100. For example, setting the maxConnections attribute to 1000 would mean that Tomcat supports a maximum of 1000 concurrent connections. I using AB for test connect but have failed request Jun 6, 2024 · The key property here is spring. max-connections=10000: Sets the maximum number of concurrent connections Tomcat can handle. Default values: artifactory: tomcat: connector: maxTh Mar 14, 2023 · Jira uses the database connection pool (DBCP) based on Apache Commons DBCP to manage Jira 's access to its underlying database. Jan 20, 2021 · ApacheをRverse Proxyとして使用し、Tomcatと連携を行う構成で設定の妥当性チェックを行った際に調べた内容のメモ。 前提環境 環境は以下の通り。 OSはWindows(ApacheのMPMはmpm_winnt) Apache 2. Since they all run under a single Tomcat connector (as defined in the server. The maxConnections parameter in the server. properties file to modify the number of rows to fetch JasperReports server. You can check a simple tomcat JDBC… Jul 1, 2020 · None yet Development Code with agent mode [artifactory] [artifactory-ha] Allow setting maximum access tomcat connections jfrog/charts Participants Mar 1, 2019 · 这两个值如何起作用，请看下面三种情况 情况1：接受一个请求，此时tomcat起动的线程数没有到达maxThreads，tomcat会起动一个线程来处理此请求。 情况2：接受一个请求，此时tomcat起动的线程数已经到达maxThreads，tomcat会把此请求放入等待队列，等待空闲线程。 The answer depends on the load you're expecting to serve. Apr 10, 2025 · A JDBC connection pool is a mechanism used to manage database connections efficiently. apache. If OS queue fills, requests may be refused or time out. In this article we will learn how to configure it in Spring Boot applications. x HikariCP is the default connection pool. max-http-post-size=2MB # Maximum size of the HTTP post content. max-connections but they work on the TCP connection level, and with HTTP/1. Tomcat is a widely used Java Servlet container for hosting Java-based web applications. In Tomcat, we can define a limit on the maximum number of requests that can be sent over a single keep-alive TCP connection. max-connections property sets a limit on the maximum number of simultaneous connections that your Tomcat server can handle. accept-count Oct 12, 2017 · 39 busy connections 1 idle connection The maxActive setting specifies the max amount of connections that may exist, in any state, at any given time. max-threads to control the number of request handling. Jan 13, 2023 · HikariCP is a fast, simple, production ready JDBC connection pool. Connections are simply the threads which perform our tasks. min-spare-threads=10 在这里有个点儿 Maximum number of connections that the Sep 4, 2025 · 本文围绕Tomcat展开，介绍了Connector处理HTTP请求时的不同protocol，如BIO、NIO和APR，说明了指定protocol的方法及BIO与NIO的区别。还阐述了acceptCount、maxConnections、maxThreads三个参数的功能及设置要点，最后提及查看Tomcat连接状态的方法。 Sep 12, 2020 · Default 200 server. max-threads = 100 server. 109) - The Tomcat JDBC Connection PoolThe Tomcat JDBC Connection Pool Jan 8, 2024 · Learn how to configure a Spring Boot JPA application to use the Tomcat JDBC Connection Pool. max-connections=2000 server. Jan 16, 2025 · 10,000 max connections: The total number of “guests” the desk can serve at once: Keep-Alive: Guests relaxing in the lounge, waiting to make a new request (idle but connected). 1. Aug 20, 2023 · The queue size can be controlled with max-connections and accept-count parameters. max-connections= # Maximum number of connections that the server will accept and process at any given time. catalina. 4 Tomcat 8. To limit the number of concurrent HTTP connections use the server. How can I set properties like the maximum size for my database connection pool? Spring-Boot supports tomcat-jdbc, HikariCP and Commons DBCP natively are they all configured the same way? Oct 27, 2019 · 详细的来说：当调用HTTP请求数达到tomcat的最大线程数时，还有新的HTTP请求到来，这时tomcat会将该请求放在等待队列中，这个acceptCount就是指能够接受的最大等待数，默认100。 如果等待队列也被放满了，这个时候再来新的请求就会被tomcat拒绝（connection refused）。 Jun 22, 2025 · # Max requests allowed per single keep-alive connection (helps limit long-lived clients) server. You should have at least as many connections to the database as you have working threads. redirectPort -- if this Connector is supporting non-SSL requests, and a request is received for which a matching <security-constraint> requires SSL transport, Catalina will Aug 17, 2016 · server. Each of these parameters plays a different role in how your application handles threading and database connections. Try Tomcat monitoring & observability for free! Sep 7, 2016 · I am using a web application based on Apache Tomcat. max를 설정해보고 알아보는 미션이 있었습니다. Mar 14, 2023 · Strangely, server. min-spare=16 //Min no. xml file provides a set of database connection pool settings to Tomcat, which in turn are used Jul 6, 2017 · pool. Embedded Tomcat Similarly, we can alter an embedded Tomcat server for Spring Boot to configure a thread pool by setting an application property: server. . max-active=200 Remark: Since your acceptCount -- The maximum queue length for incoming connection requests when all possible request processing threads are in use. This sets the number of concurrent HTTP connections Artifactory can serve. I using AB for test connect but have failed request Feb 14, 2017 · 8 There is a properties for spring boot, tomcat max-connection, which needs to be set in application. Executor interface. Maximum Number of Connections and Maximum Waiting Number Taking Tomcat, the default web container for the Spring Boot framework, as an example, the number of Various properties can be specified inside your application. Sep 12, 2019 · Desired behavior: Tomcat processes large messages in a configured number of threads If all threads are occupied, Tomcat accepts the connections, but is not receiving the large data over the network and holding the connections until threads are available. max-keep-alive-requests=100 #Maximum size of a form post. Jun 26, 2025 · Therefore, the absolute maximum number of requests your application can queue up is: Total Capacity = server. max-threads determine the max number of connections and max number of threads in the application. This method sets the maximum number of active connections allowed in the pool. Adjust this based on your application’s expected user base and workload. max-threads=200 server. Sep 6, 2022 · I'm going to send an array of about 5 millions of records in json format in my spring boot app . Feb 20, 2021 · We are trying to increase the number of connections on tomcat7. max-connections Tomcat이 동시에 처리할 수 있는 최대 클라이언트 연결 수를 정의한다. These two keys are same things in different spring versions. max-threads – Maximum amount of worker threads in server under top load. The default value is "0", which disables closing idle connections. max-threads' property in your `application. Dec 10, 2018 · Catalina server, service, and connectors The two top-level elements of Tomcat are the Catalina server and service (which is nested within the server element). 1 protocol. *, are configuration properties for the Apache Tomcat JDBC Connection Pool when used within a Spring Boot application. This part of the Spring Boot documentation gives the preference order of the datasource implementation : tomcat: accept-count: 1000 max-connections: 10000 max-threads: 800 min-spare-threads: 100 Spring Boot的默认配置信息，都在 springboot-autoconfigure-版本号. We can use the ConnectionLimit class for limiting the connections. I using domain http I using AWS ELB for 2 serser. Creating a database connection involves several time-consuming steps, such as: opening a connection to the database authenticating the user creating a TCP socket for communication sending and receiving data over the socket closing the connection and the TCP socket Repeating these steps for each user request Jul 21, 2023 · 简而言之，当调用HTTP请求数达到Tomcat的最大连接数时,还有新的HTTP请求到来,这时Tomcat会将该请求放在等待队列中,这个acceptCount就是指能够接受的最大等待数，默认100。 如果等待队列也被放满了，这个时候再来新的请求就会被Tomcat拒绝 (connection refused)。 Nov 14, 2024 · Artifactory runs on top of Apache Tomcat, which manages the incoming HTTP connection pools. x, Tomcat connection pool was the default connection pool but in Spring Boot 2. yml file or as command line switches. Mar 16, 2023 · Use Connection Timeout and Keep-Alive Settings To prevent connection timeouts and improve connection reuse, you can configure Tomcat’s connection timeout and keep-alive settings. max-idle = 30 as the Tomcat server can be started by the Spring Boot application itself. Aug 11, 2020 · In this article, we ‘ll focus on creating a high-concurrency connection pool for Apache Tomcat. max thread is 1000 But Max connection is 300 then 300 requests will be // processed concurretly remaning request will allocated to remaining threads after 300 is processed server. Try to determine it and tune your Sep 5, 2025 · 默认最大连接数maxConnections = 10000 默认队列长度acceptCount = 100 默认最大工作线程数maxThreads = 200 默认最小工作线程数 minSpareThreads = 10 也就是说配置如下 server. In this post, we'll delve into how you can optimize Jun 24, 2018 · server. 1 Connector. If more requests arrive, Tomcat accepts them until maxConnections. Apache Tomcat 7 (7. A particular instance of this component listens for connections on a specific Mar 19, 2024 · Nested Components First implemented in Tomcat 9 and back-ported to 8. max-http-header-size=0 # Maximum size in bytes of the HTTP message header. Introduction The HTTP Connector element represents a Connector component that supports the HTTP/1. max-threads = 200 server. max-keep-alive-requests property sets a limit on how many times a single keep-alive connection can be used for requests before Tomcat closes it and forces the client to create a new one. xmlファイルでコネクタの設定を調整する必要があります。 Jan 10, 2019 · So use server. tomcat ” namespace in your application. jdbcInterceptors - flexible and pluggable interceptors to create any customizations around the pool Nov 6, 2025 · The Executor represents a thread pool that can be shared between components in Tomcat. Jul 14, 2020 · The maximum number of connections (something completely different from number of sessions) can be configured in server. max=250 4. The default value is 8192. accept-count = 100 server. Mar 3, 2020 · 7 According to this link, the properties server. Use -1 for unlimited. Number of Threads for task execution Nov 6, 2025 · The Tomcat connection pool offers a few additional features over what most other pools let you do: initSQL - the ability to run an SQL statement exactly once, when the connection is created validationInterval - in addition to running validations on connections, avoid running them too frequently. max, max-connections, and accept-count, you can control how many requests are processed or queued. accept-count and server. Connections are queued inside the server socket created by the Connector until a thread becomes available to process the connection. Other Connection Pools Spring Boot is compatible with other connection pools such as HikariCP and Commons DBCP. Jul 28, 2023 · server. propertiesまたはapplication. max-threads=400 -Dserver. Tomcat will keep accepting the new connections until max-connections limit is reached, once this limit is reached connections will not be accepted by tomcat, hence they will be queued at OS level. xml configuration file allows us to control the flow of incoming requests. jdbcInterceptors - flexible and pluggable interceptors to create any customizations around the pool Jul 23, 2024 · 总结 简而言之，server. There are 3 connection pools - Artifactory, Access, and Metadata. Here is an example: Aug 20, 2014 · As long as server. Note Jun 19, 2018 · Tomcat connection pool has ability to configure custom interceptors, better idle connection handling and performs asynchronous connection retrieval. max-connections = 100 spring. 0. # # KeepAlive: Whethe Apr 20, 2024 · Tomcat Compress HTTP responses at the Tomcat level Set up a cache filter for Tomcat or JBoss Disable automatic deployment on production servers using Tomcat Database Index columns in the database to speed up domain-based reports Set the fetch size in the jasperreports. max-active = 100 spring. accept-count properties, as @M. However, because the Servlet API is fundamentally blocking, each Database connection pool sizing recommendations: Take into consideration the size of DB instance. If we consider spring boot , it may be anything Tomcat Server Connections or Database Connections. 3, the property has changed to: server. I using tomcat 8 for 2 server. May 27, 2025 · In Spring Boot applications, the server. One or more such Connectors can be configured as part Jan 15, 2022 · server. Jan 27, 2016 · I have 2 server AWS EC2 with each server is: CPU=2 RAM=15GB. Explore the differences and relationships between maxThreads and maxConnections in Tomcat. Glassfish Next, let’s update our Glassfish server. OS queue size is controlled by acceptCount. May 11, 2024 · In Spring Boot, we can define the maximum amount of Tomcat worker threads: server. So, my questions are: Jun 22, 2024 · To determine the maximum number of concurrent requests Tomcat can handle by default, we need to consider the type of connector used to accept incoming requests. max=200 When configuring a web server, it also might be useful to set the server connection timeout. MaxConnections The maximum number of connections that the server will accept and process Sep 27, 2025 · 如果tomcat使用的是BIO，那么maxConnections的值应该与maxThreads一致；如果tomcat使用的是NIO，maxConnections值应该远大于maxThreads。 （3）通过前面的介绍可以知道，虽然tomcat同时可以处理的连接数目是maxConnections，但服务器中可以同时接收的连接数为maxConnections+acceptCount 。 May 1, 2020 · 详细的来说：当调用HTTP请求数达到tomcat的最大线程数时，还有新的HTTP请求到来，这时tomcat会将该请求放在等待队列中，这个acceptCount就是指能够接受的最大等待数，默认100。 如果等待队列也被放满了，这个时候再来新的请求就会被tomcat拒绝（connection refused）。 Jun 27, 2023 · There are two properties named server. server. Spring Boot auto-configures a DataSource, and by default, it uses the Tomcat JDBC Connection Pool if it's available on the classpath. Configure the 'server. Aug 22, 2024 · Configuring Tomcat JDBC Connection Pool Firstly, to configure Tomcat Connection Pool you need to add the properties in the “ spring. My Current database pool configuration in t max-connections, accept-count, threads. In a Spring application using Tomcat as the embedded server, understanding the configurations for server. Historically there has been a thread pool per connector created but this allows you to share a thread pool, between (primarily) connector but also other components when those get configured to support executors The executor has to implement the org. xml file), attributes such as maxConnections and Aug 22, 2013 · Here is the description of maxConnections params for Tomcat 7: The maximum number of connections that the server will accept and process at any given time. max-connections already. I have multiple web applications running under a single Tomcat container. 35 Acceptor监听网络连接，有连接进来后注册在Poller中，Poller通过轮询检测连接中的读写事件，有事件发生时调用processor进行请求处理。如下图： server. The executor is a nested Nov 7, 2023 · Tuning Apache Tomcat in Spring Boot involves optimizing its configuration and settings to achieve better performance and resource utilization for your specific application. Jun 15, 2023 · Tomcat has such a property named server. Try with: spring. 5, Tomcat now supports Server Name Indication (SNI). Tomcat. Jan 14, 2022 · The maximum amount of concurrent request threads and the maximum amount of concurrent database connections differ a lot. The maxIdle setting is more specific and only determines the max amount of idle connections. is there any way to increase http request timeout in order to prevent from connection timeout? May 2, 2010 · Cool, Tomcat is able to handle more than 13,000 concurrent connections. Learn how to configure them effectively. This section provides a list of common Spring Boot properties and references to the underlying classes that consume them. We generally recommend values around 10 minutes, so setting connection_pool_timeout to 600 (seconds). connection-timeout=1200000 Request per second were raised constantUsersPerSec(20) during (15) to 300 during course of 15 seconds and all requests were served as can be seen in plot below from gatling (blue). It enables Catalina to function as a stand-alone web server, in addition to its ability to execute servlets and JSP pages. For more information, see the Proxy Support How-To. ksxq lwol xonkc oyrmsp kpnlatf fdrqnb dwl xhcf kunf lckvlto ngge oxyqwh djdz rkfzuhn hajj