Hi there, fix common problems told me i have an out of memory error and recommended i post my rig's diagnostics here.  So here I am, diagnostics attached, thanks in advance. 

tower-diagnostics-20190408-1230.zip

Here is what Fix Common Problems is referring to:

Mar 11 16:20:59 Tower kernel: Out of memory: Kill process 4088 (sabnzbdplus) score 328 or sacrifice child
Mar 11 16:20:59 Tower kernel: Killed process 4088 (sabnzbdplus) total-vm:2271268kB, anon-rss:1241392kB, file-rss:0kB, shmem-rss:0kB
Mar 11 16:20:59 Tower kernel: oom_reaper: reaped process 4088 (sabnzbdplus), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

I am no Guru when it comes to these type of problems but I did notice that you are using 6.4.1 which is more than a year out of date.  (Current stable version is 6.6.7)   You should really update!  (Make a complete backup of your Flash drive before you upgrade.)

 

You appear to have only have 4GB of RAM in this server and part of that is being used for the GPU.  That could be a bit light if you have a lot of plugins and Dockers.

 

Are you getting e-mail notifications from the server?  I saw several of these in your syslog:

Mar  8 23:16:02 Tower sSMTP[1525]: SSL connection using ECDHE-RSA-AES128-GCM-SHA256
Mar  8 23:16:03 Tower sSMTP[1525]: Authorization failed (535 5.7.8  https://support.google.com/mail/?p=BadCredentials g188sm14040975pfc.24 - gsmtp)

As I recall, you have to drop the security level on G-mail to be able to send email from Unraid using it. 

"As I recall, you have to drop the security level on G-mail to be able to send email from Unraid using it. "

 

you can generate a password in gmail, for 3rd party applications like unraid, and use that.