I'm having hell of a time trying to get my MN's to stay in ENABLED status.
It seems as if even one instance out of the five locks up on my VPS, then all 5 MN's go into MISSING status.
On 8 of my 22 VPS's, between 1 to 4 instances of the darknetd constantly lock up on me. I have to delete the blockchian files, stop the instances, then restart them again, only to have it happen all over again.
When I run the getinfo command on the locked up instances, it says something like "Error loading block database", and occasionally "Cannot connect to server".
Anyone guess why this keeps happening? I'm using mxnsch's script, btw, which automatically uses the latest version of darknetd. My control wallet is also on the latest version. I'm on the $5 VULTR VPS's.
My experience from running some MNs tells me one important thing: Always be sure to have enough RAM. Swap Memory is not a solution if it's backed by HDDs. You will get a much higher CPU load and darknetd reacts badly on this shortage by corrupting the database or simply not catching up with the blockchain and locking up.
So get yourself a VPS with enough base RAM. There are lot's of VPS providers with equal or even lower prices which provide enough ressorces for this task. About 200-250MB per darknetd instance should be enough ATM.