Hi,
I've had this VM for two weeks already and I've been having this issue intermittently. My VM is a B1S running Debian 9 for a Wordpress site on a LAMP stack. This VM size should be enough as it's practically the same setup I've been running for 2 years on Digital Ocean with 0 issues.
The machine works fine until disk reads start to go up and up to 1.5GB and 500 operations/s.
The high read period sometimes runs for 15-20 minutes, other times 30, and today for almost an hour, until I restarted the VM. Restarting the VM is the only way to "get it back" as it's impossible to log through SSH or execute any operation from Azure, it's totally blocked.
I've found people having issues with OMS so I've disabled the provisioning in Security Center and uninstalled it from the VM. The issue got better, but it's still happening. I 've also uninstalled SCX and I'm thinking on disabling all cron jobs that call OMI to see if this still persists or not.
Has anybody had this issue? It's taking my site down at least twice a day and I don't know what to try now.