making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user. CONTENTS 1Tornado Documentation, Release 6.5.1 2 CONTENTSCHAPTER ONE QUICK LINKS making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user. Tornado can be roughly divided into three major components: • A web framework (including 1.2 Asynchronous and non-Blocking I/O Real-time web features require a long-lived mostly-idle connection per user. In a traditional synchronous web server, this implies devoting one thread to each user

WebSockets [https://en.wikipedia.org/wiki/WebSocket], and other applications that require a long-lived connection to each user. Quick links Current version: 6.5.1 (download from PyPI [https://pypi.python.org/pypi/tornado] httpclient — Asynchronous HTTP client tornado.httputil — Manipulate HTTP headers and URLs tornado.http1connection – HTTP/1.x client/server implementation Asynchronous networking tornado.ioloop — Main event loop non-blocking socketstornado.netutil — Miscellaneous network utilities tornado.tcpclient — IOStream connection factory tornado.tcpserver — Basic IOStream-based TCP server Coroutines and concurrency tornado

command-line options, this is referred to as “server” or “client” mode, respectively. For a direct connection between two virtual machines (corresponding to a null-modem cable), simply configure one VM to present, but that there is no connection – as if no Ethernet cable was plugged into the card. This way it is possible to “pull” the virtual Ethernet cable and disrupt the connection, which can be useful to inform inform a guest operating system that no network connection is available and enforce a reconfiguration. Network Address Translation (NAT) If all you want is to browse the Web, download files and view e-mail

command-line options, this is referred to as “server” or “client” mode, respectively. For a direct connection between two virtual machines (corresponding to a null-modem cable), simply configure one VM to present, but that there is no connection – as if no Ethernet cable was plugged into the card. This way it is possible to “pull” the virtual Ethernet cable and disrupt the connection, which can be useful to inform inform a guest operating system that no network connection is available and enforce a reconfiguration. Network Address Translation (NAT) If all you want is to browse the Web, download files and view e-mail

command-line options, this is referred to as “server” or “client” mode, respectively. For a direct connection between two virtual machines (corresponding to a null-modem cable), simply configure one VM to present, but that there is no connection – as if no Ethernet cable was plugged into the card. This way it is possible to “pull” the virtual Ethernet cable and disrupt the connection, which can be useful to inform inform a guest operating system that no network connection is available and enforce a reconfiguration. Network Address Translation (NAT) If all you want is to browse the Web, download files and view e-mail

command-line options, this is referred to as “server” or “client” mode, respectively. For a direct connection between two virtual machines (corresponding to a null-modem cable), simply configure one VM to present, but that there is no connection – as if no Ethernet cable was plugged into the card. This way it is possible to “pull” the virtual Ethernet cable and disrupt the connection, which can be useful to inform inform a guest operating system that no network connection is available and enforce a reconfiguration. Network Address Translation (NAT) If all you want is to browse the Web, download files and view e-mail

command-line options, this is referred to as “server” or “client” mode, respectively. For a direct connection between two virtual machines (corresponding to a null-modem cable), simply configure one VM to present, but that there is no connection – as if no Ethernet cable was plugged into the card. This way it is possible to “pull” the virtual Ethernet cable and disrupt the connection, which can be useful to inform inform a guest operating system that no network connection is available and enforce a reconfiguration. Network Address Translation (NAT) If all you want is to browse the Web, download files and view e-mail

0.0:11653... Started (send SIGINT or SIGTERM to exit) 2021-10-06T04:01:26.490694105Z Accepted connection 10.244.0.119:42972 => 0.0.0.0:11653 2021-10-06T04:01:26.490785365Z 10.244.0.119:42972 => 0.0 streamed until final message or until client requests cancel Server acknowledges cancel After response connection is ready for another request Server sends heartbeats during inactivity 5 DataConn Message Structure 0.0:11653... Started (send SIGINT or SIGTERM to exit) 2021-10-06T04:01:26.490694105Z Accepted connection 10.244.0.119:42972 => 0.0.0.0:11653 2021-10-06T04:01:26.490785365Z 10.244.0.119:42972 => 0.0

100ms TiDB 集群监控 重要监控指标详解 TiDB 快速入门指南 - 21 - 本文档使用 书栈(BookStack.CN) 构建 tidb server QPS : 集群的请求量 connection count : 从业务服务器连接到数据库的连接数 和业务相关。但是如果连接数发生跳变，需要查明原因。比如突然掉为 0，可以检查网络是否中断； 如果突然上涨，需要检查业务。 statement pem" 3. ssl-key = "certs/server-key.pem" 若证书参数无误，则 TiDB 在启动时将会输出 Secure connection is enabled ，否则 TiDB 会输出 Secure connection is NOT ENABLED 。 MySQL 5.7 及以上版本自带的客户端默认尝试使用安全连接，若服务端不支持安全连接则自动退回到使用非安全连 语句的完整信息，比如以什么样的顺序，什么方式 JOIN 两个表， 表达式树长什么样等等。详细请看 EXPLAIN 输出格式； TiDB 目前还不支持 EXPLAIN [options] FOR CONNECTION connection_id ，我们将在未来支持它，详细请 看：#4351； 通过观察 EXPLAIN 的结果，你可以知道如何给数据表添加索引使得执行计划使用索引从而加速 SQL 语句的执行 速度；你也可以使用

--keepalive (or -k): This specifies the maximum number of requests which can be sent in one web service connection, and defaults to 100. This normally does not need to be changed. • --authentication (or -A): This the same whether you use the object-oriented web service (OOWS) for JAX-WS or a raw web service connection via, say, Perl, or whether you use C++ COM bindings. Some things are different depending on your procedure and would, for these two pseudo-lines, automatically perform these steps: 1. prepare a connection to a web service running on port 18083 of “localhost”; 2. for the SayHello() function of the web