11/13/2023 0 Comments Pm2 monit![]() You can control the time that the app has to shutdown via the PM2_GRACEFUL_TIMEOUT environment variable.Įxample: process. Graceful reload is a mechanism that will send a shutdown message to your process before reloading it. To work around this problem you have to use the graceful reload. It means that your app still has open connections on exit. Sometimes you can experience a very long reload, or a reload that doesn't work (fallback to restart). ![]() If the reload system hasn't managed to reload your app, a timeout will simply kill the process and will restart it. Warning This feature only works for apps in cluster_mode, that uses HTTP/HTTPS/Socket connections. WebSocket/Socket.io should communicate via a databaseĪs opposed to restart, which kills and restarts the process, reload achieves a 0-second-downtime reload.Sessions must not be stored in memory but shared via a database (Redis, Mongo, whatever).Important concepts to make a Node.js app stateless: If your app is well-designed ( stateless) you'll be able to process many more queries. To launch max instances ( max depending on the number of CPUs available) and set the load balancer to balance queries among process: $ pm2 start app.js -name "API" -i 0ĭEPRECATED (STILL COMPATIBLE): $ pm2 start app.js -name "API" -i max To enable the cluster_mode, just pass the -i option: $ pm2 start app.js -i 1 The cluster_mode will automatically wrap your Node.js app into the cluster module and will enable you to reload your app without downtime and to scale your processes across all CPUs available. ~/.pm2/logs/-.log, otherwise it's specific. Notes: When you providing a Boolean ( true) value for -l, -log option or log_file property, it means a merged log file will be automatic generated, i.e. How about merge out and err logs into one, and also keep the separated logs? e.g.: $ pm2 start -l $ pm2 start -l name.log If you only want to merge out and err logs into one output file, try with the following examples: $ pm2 start name.js -o name.log -e name.log log-date-format : prefix logs with formated timestamp ( #/parsing/string-format/) 合并 out 和 err 日志 选项 -merge-logs : merge logs from different instances but keep error and out separated You can also reload all logs via the command line with: $ pm2 reloadLogs To reload all logs, you can send SIGUSR2 to the PM2 process. Navigate between processes logs in realtime with an ergonomic interface: $ pm2 ilogs If this env-variable has been changed, you need to dump your processes and kill daemon, restart it again to take effect, e.g.: $ pm2 dumpĭisplaying logs of specified process or all processes in realtime: $ pm2 logs ![]() Units can be K(ilobyte), M(egabyte), G(igabyte). Internally it uses the V8 flag -max-old-space-size=MEM to make a process exit when memory exceed a certain amount of RAM used.ĬLI: $ pm2 start big-array.js -max-memory-restart 20M 列出指定进程的详细信息: $ pm2 describe 0 Automatic restart process based on memory Select your monitor of choice to receive the support you need for your performance monitor for your indoor exercise machine: PM1, PM2, PM2+, PM3, PM4 or PM5. 现在需要停止web-interface: $ pm2 stop web-interface The retrofit you choose is up to your personal preference.$ pm2 start web.js -name "web-interface" While the PM5 will fit on the existing monitor arm, the new monitor arm (included with PN 25) allows for improved monitor cord routing for a tidier overall finished look, and the ability to mount most phones and tablets. ¹ When retrofitting a PM5 to a Model D or Model E you have two options: to purchase just the Performance Monitor (PN 1818) or to purchase the Performance Monitor with new mounting hardware and the device holder (PN 2562 or 2565). If you are not sure which model indoor rower you have, visit /service for help. Important! Be sure to select the correct machine type, and for indoor rowers, the correct model type when purchasing this part. pm2 monit is about process management: The local monitoring tool get you insight about CPU usage, memory usage, loop delay or request/min for each process.
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