What is the master process?

The master process coordinates all of the other event server processes. If one of the other processes dies, the master process will try to restart it. If the master process can restart it, the master process will bring the rest of the processes down gracefully.

What are the process in Linux?

Fields described by ps are described as:

• UID: User ID that this process belongs to (the person running it)
• PID: Process ID.
• PPID: Parent process ID (the ID of the process that started it)
• C: CPU utilization of process.
• STIME: Process start time.
• TTY: Terminal type associated with the process.

Is Gunicorn asynchronous?

The asynchronous workers available are based on Greenlets (via Eventlet and Gevent). Greenlets are an implementation of cooperative multi-threading for Python. In general, an application should be able to make use of these worker classes with no changes.

How many Gunicorn threads are there?

The gunicorn docs suggest that one only needs a small handful of worker “entities” (threads or workers) to handle many thousand requests. As a “sensible” default given the connection limit constraints noted above, we aim for “# workers” x “# threads” to be around 4.

What is Postfix in Linux?

Postfix is an open source mail-transfer agent that was originally developed as an alternative to Sendmail and is usually set up as the default mail server.

What is Postfix QMGR?

The qmgr(8) daemon is responsible for asking the bounce(8), defer(8) or trace(8) daemons to send delivery reports. STRATEGIES The queue manager implements a variety of strategies for either opening queue files (input) or for message delivery (output).

What is a parent process in Linux?

A parent process is one that creates a child process using a fork() system call. A parent process may have multiple child processes, but a child process only one parent process. On the success of a fork() system call: The Process ID (PID) of the child process is returned to the parent process.