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Monitoring Tinode server

Tinode server can optionally expose runtime statistics as a json document at a configurable HTTP(S) endpoint. The feature is enabled by adding a string parameter expvar to the config file. The value of the expvar is the URL path pointing to the location where the variables are served. In addition to the config file, the feature can be enabled from the command line by adding an --expvar parameter. The feature is disabled if the value of expvar is an empty string "" or a dash "-". A non-blank value of the command line parameter overrides the config file value.

The feature is enabled in the default config file to publish stats at /debug/vars.

As of the time of this writing the following stats are published:

  • memstats: Go's memory statistics as described at https://golang.org/pkg/runtime/#MemStats
  • cmdline: server's command line parameters as an array of strings.
  • TotalSessions: the count of all sessions which were created during server's life time.
  • LiveSessions: the number of sessions currently live, regardless of authentication status.
  • TotalTopics: the count of all topics activated during servers's life time.
  • LiveTopics: the number of currently active topics.