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Systemd refactor (#1254)

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This reduces the system metric collection time by using a wait group
and go routines to allow the systemd metric calls happen concurrently.

Also, makes the start time, restarts, tasks_max, and tasks_current metrics disabled by default
because these can be time consuming to gather.

Signed-off-by: Paul Gier <pgier@redhat.com>
This commit is contained in:
Paul Gier 2019-02-11 16:27:21 -06:00 • committed by Ben Kochie
commit cb9e23c536
3 changed files with 181 additions and 195 deletions
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CHANGELOG.md
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@ -7,6 +7,8 @@
* The cpufreq metrics now separate the `cpufreq` and `scaling` data based on what the driver provides. #1248
* The labels for the network_up metric have changed, see issue #1236
* Bonding collector now uses `mii_status` instead of `operstatus` #1124
* Several systemd metrics have been turned off by default to improve performance #1254
These include unit_tasks_current, unit_tasks_max, service_restart_total, and unit_start_time_seconds
### Changes
@ -16,6 +18,7 @@
* [CHANGE] Add TCPSynRetrans to netstat default filter #1143
* [CHANGE] Add a limit to the number of in-flight requests #1166
* [CHANGE] Add separate cpufreq and scaling metrics #1248
* [CHANGE] Several systemd metrics have been turned off by default to improve performance #1254
* [ENHANCEMENT] Add Infiniband counters #1120
* [ENHANCEMENT] Move network_up labels into new metric network_info #1236
* [FEATURE] Add a flag to disable exporter metrics #1148