[
https://issues.apache.org/jira/browse/UIMA-5047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jerry Cwiklik closed UIMA-5047.
-------------------------------
Resolution: Fixed
Modified to use cgroups as source for node and process level stats
> UIMA-DUCC: refactor agent code which gathers node and process metrics
> ---------------------------------------------------------------------
>
> Key: UIMA-5047
> URL: https://issues.apache.org/jira/browse/UIMA-5047
> Project: UIMA
> Issue Type: Improvement
> Components: DUCC
> Reporter: Jerry Cwiklik
> Assignee: Jerry Cwiklik
> Fix For: 2.2.0-Ducc
>
>
> Currently agent fetches metrics from different sources including /proc file
> system, top, ps, etc. The files found in /proc file system don't have fixed
> structure across Linux platforms causing some metrics to be missing or be
> wrong. Also scrapping lnx commands may not be 100% reliable as well
> Change the code to fetch CPU metrics from cgroups. For reporting the CPU, the
> agent needs to look at cgroups cpuacct.stat file.
> Agent will collect process CPU usage when
> a) cgroups are ON.
> b) cgroups accounting is configured in cgconfig
>
> Agent publishes -1 ( read: N/A) if cgroups are OFF or accounting is OFF.
> Agent will:
> a) fetch the CPU from cgroups accounting as a sum of CPU spent in both
> user and system mode.
> These are separately maintained counts in cgroups.
> b) agent should publish delta (subtracting current from previous reading)
>
> Agent will continue to include two CPU values as part of its inventory
> publication:
> 1) Total CPU used by a process from the time it started. This value is
> used by the webserver to show CPU usage when a process terminates.
> 2) "Current" CPU used be a process. This is a delta computed as described
> in 2c above. This value is shown by the webserver while the process is
> running.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
