I've been having this problem for a few weeks and I'm struggling to figure out what to do.
I have a scheduled full backup over SSH. When the VPS has been freshly restarted it usually works without issue, but after its been running for a few days backups will not complete. When this happens no log is saved in Backup Logs.
If I run the backup manually I can see that the first few virtual servers backup, TAR, and transfer successful. But when it gets to a larger virtual server it seems to fail during TAR. At this point I can see the whole backup and TAR process has been exited.
I suspect it could be a RAM issue, but I haven't been able to locate any OOMs for TAR or backup.pl in logs. The VPS has 1GB of RAM and 500MB of VSwap (its OpenVZ).
What should I do next?