After recently upgrading (6.6->7.0.8), why is splunkd_server now consuming a lot of memory?

[SplunkIsLife]

We upgraded on 2/11 from 6.6 to 7.0.8, and are now seeing daily occurrences of splunkd_server taking up to 9g of avg memory for extended periods of time.

I can't find much online about what splunkd_server is, what processes run under it, or how to figure out why it's consuming significant memory. Any help is appreciated.

Thanks!

[chrisyounger]

There were some memory related bugs in the 7.0.x releases, but I cant find anything specific on this page:
https://docs.splunk.com/Documentation/Splunk/7.0.8/ReleaseNotes/KnownIssues

If I were you, I would continue upgrading to the latest version 7.2.4