December 25, 20196 yr I've been getting Out of Memory errors on my server, currently running 6.8, but I saw this on 6.6.5 as well. Looking at processes it appears that a couple of smbd processes are using more than 50% of my memory. The specific smbd processes are owned by a user which is a "service account" used by two Proxmox servers for accessing a backups share and an "installers" share. Any thoughts on 1) if Samba is the root cause and 2) why it's running out of control with memory? FYI - Yes, I am using CrashPlan which is a memory hog. I have limited it to 1 GB so it shouldn't be the cause of this. nas01-diagnostics-20191224-2250.zip
December 25, 20196 yr The processes gone wild are kicked off from user "proxmox", so something they're doing is triggering badness and using nearly 58% of your memory. First one was started on December 13th, next one was started on December 22nd. Their virtual memory size combined is 13,451,824 bytes or 12.8 Gig. proxmox 9770 0.3 12.9 4188792 2063548 ? S Dec13 62:28 \_ /usr/sbin/smbd -D 9770 proxmox 20 0 4188792 2.0g 20232 S 0.0 13.0 62:28.90 smbd COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME smbd 9770 proxmox 35u IPv4 1645887 0t0 TCP 192.168.2.6:445->192.168.2.28:47650 (ESTABLISHED) proxmox 21062 0.6 44.8 9263032 7128992 ? S Dec22 26:06 \_ /usr/sbin/smbd -D 21062 proxmox 20 0 9263032 6.8g 19660 S 0.0 44.8 26:06.34 smbd COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME smbd 21062 proxmox 36u IPv4 74503557 0t0 TCP 192.168.2.6:445->192.168.2.19:53712 (ESTABLISHED) Edited December 25, 20196 yr by BRiT
December 27, 20196 yr Author Thanks @BRiT - I noticed that as well. Proxmox is a "service account" for my Proxmox hosts to conduct backup and access installer files (i.e. Linux ISO's). Any idea why this would be causing smbd to run away with memory? Is there something I can tune / fix / limit in Unraid for this?
January 2, 20206 yr Author Proxmox support is indicating this is a likely a caching issue with Unraid. "This sounds like cache problems on the Unraid Box. The point is you load an image and not small files as you do with Windows file share." The two connections from Proxmox to Unraid are for 1) loading Linux ISOs for creating VMs, and 2) nightly backups / snapshots of all running VMs and containers. I suspect the second item is what is causing the runaway memory. Is there a way to have Unraid "clear cache" on a share?
January 8, 20206 yr Author Not sure if this is a relevant data point (will continue to monitor). I just turned cache off for the biggest Proxmox share (the backup share) and RAM immediately dropped from 86% used to 24% used.
Archived
This topic is now archived and is closed to further replies.