Constant messages about dovecot/indexer-worker

Hello,

i am running a VPS with Cpanel 68.0.33 on CentOS 7 x64 with 8GB dedicated RAM.

My server does not have all that many mail accounts -- probably no more than 30, all told, but some of these accounts are stupidly huge (like, over 45GB -- customer's always right, right?)

Anyway, i installed+enabled Solr, and recently enabled Dovecot compression in maildir format.

For a couple of months now, i've been getting onslaughts of messages regarding:
dovecot/indexer-worker
dovecot/indexer

Note: i know how to disable the alerts; that is not the issue..

The issue is that i'm wondering if there is anything i can do..

Restarting the server sometimes alleviates the issue for a couple of days, but it invariably comes back.

What's more, my clients (all Macs) report problems downloading attachments now (i have seen this issue as well)..

So, basically:
Should i get rid of Solr?
Should i stop Dovecot compression (if so, what happens to compressed messages)?

Other suggestions most welcome!
Thank you in advance!

 

Just a quick follow-up:
my cPanel license requires that i go through my hosting company -- which i'm more than happy to do, by the way, because they absolutely rock -- and they basically said that it's normal for Solr to spend days indexing a same account if they have such massive mail usage..

As i mentioned to them, i don't like adding processes to lfd’s pignore file because it’s kind of akin to sticking my fingers in my ears and screaming 'lalalala' ;-)
But they said they silence the following processes for that very reason:
exe:/usr/libexec/dovecot/indexer-worker
exe:/usr/libexec/dovecot/indexer


2 questions remain, though:
- is Solr that worthwhile (it can take up to 1 GB RAM on a VPS)?
- What is causing the macOS mail.app to have issues downloading attachments?

Any help would be greatly appreciated