Prometheus.Contrib.Mnesia (Prometheus.ex v4.0.0)

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Mnesia instrumentation helpers.

Summary

Functions

table_disk_size(dir \\ :mnesia.system_info(:directory), table)

Returns sum of all mnesia files for the given table in bytes. Mnesia can create different files for each table

tm_info()

Returns {pcount, ccount} tuple, where pcount is a number of participant transactions and ccount is a number of coordinator transactions. Can return {:undefined, :undefined} occasionally.

Functions

table_disk_size(dir \\ :mnesia.system_info(:directory), table)

Returns sum of all mnesia files for the given table in bytes. Mnesia can create different files for each table:

  • .DAT - DETS files
  • .TMP - temp files
  • .DMP - dumped ets tables
  • .DCD - disc copies data
  • .DCL - disc copies log
  • .LOGTMP - disc copies log

More on Mnesia files can be found in

Mnesia System Information chapterof Mnesia User's Guide

tm_info()

Returns {pcount, ccount} tuple, where pcount is a number of participant transactions and ccount is a number of coordinator transactions. Can return {:undefined, :undefined} occasionally.