MuS, thanks for replying! You are correct, it's not directly a splunk question, but since it is the suggested way to get linux metrics into splunk, I thought I'd ask here.
On RHEL 7.5 running collectd 5.8.0, collectd -t and collectd -T return fine. -h tells me the default config file is /etc/collectd.conf
I've looked at that bug you linked, so I un-commented the interval line in /etc/collectd.conf, and set it to 300. (As it is set to 10 by default)
I've grep'd Interval in /etc/collectd.conf and /etc/collectd.d/* and looked for any other Interval settings that could override it, and there aren't any.
I do know it's using the correct config file, because all of my plugins are being loaded!
I'm leaning towards it's a bug in RedHat's release of collectd. I've got a ticket open with them. I'll update here.
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