Poller Service - Problem with graphs

Help
1

Hello,

Component Version
LibreNMS 1.49-33-g6ec9730
DB Schema 2019_02_10_220000_add_dates_to_fdb (132)
PHP 7.2.15-1+ubuntu16.04.1+deb.sury.org+1
MySQL 5.7.21-20-log
RRDTool 1.5.5
SNMP NET-SNMP 5.7.3
====================================

[OK] Composer Version: 1.8.4
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct

We migrated from cron distributed poller to systemd distribute poller with redis in last week. After migration We observe a different cpu utilization in LibreNMS cluster machines. (mostly DB master and DB slave).

Zaznaczenie_080
Zaznaczenie_0801582×358 236 KB

On left cron polling, gap (migration), on left systemd polling.
Could you help us with explain this?

2

Yes the service does not schedule polling like a cron, intentionally. It will end up spreading the polling out over 5 minutes a little better. Also, if this is a LibreNMS graph, you will have some sample bias.