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btrfs locking at 74% on 6.1.6
I'm running 6.1.6 final - I STARTED with a fresh install and rebuild on a 6.1.6RC
I had all my data offloaded; I started copying it back.
I've since updated to 6.1.6 final.
I am now copying it back.
As I got into the 70% range, I started to have performance problems.
I would see some btrfs processes spiking CPU; and top reports most CPU usage going to 'wait' times.
Load increases to 30+ and the system becomes unresponsive. Data copies to the system crawl to a halt.
I stop transfers and the system eventually recovers (sometimes I have to reboot it).
So long as I don't add more data; it works great -- but all efforts to add additional data seems to create problems.
I'm quite sure my btrfs block size should be the new; larger size -- but is there a command I can run to confirm?
If I'm running the larger block size; it would appear there's still a major problem here!
Open to suggestions of what to do!
I'd really like to use the last 3TB of my NAS!
/dev/md127 11T 8.1T 2.9T 74% /data
I had all my data offloaded; I started copying it back.
I've since updated to 6.1.6 final.
I am now copying it back.
As I got into the 70% range, I started to have performance problems.
I would see some btrfs processes spiking CPU; and top reports most CPU usage going to 'wait' times.
Load increases to 30+ and the system becomes unresponsive. Data copies to the system crawl to a halt.
I stop transfers and the system eventually recovers (sometimes I have to reboot it).
So long as I don't add more data; it works great -- but all efforts to add additional data seems to create problems.
I'm quite sure my btrfs block size should be the new; larger size -- but is there a command I can run to confirm?
If I'm running the larger block size; it would appear there's still a major problem here!
Open to suggestions of what to do!
I'd really like to use the last 3TB of my NAS!
/dev/md127 11T 8.1T 2.9T 74% /data
17 Replies
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- Download the logs.
In btrfs.log what do you see for the nodesize and the leafsize for /dev/md127 ?
Can you post the contents of your initrd.log ? - nodesize 16384
leafsize 16384
Full content of initird.log is 3 lines:
[2014/02/02 22:37:04] Factory default initiated by Frontview!
[2014/02/02 22:37:35] Defaulting to X-RAID2 mode, RAID level 5
[2014/02/02 22:37:58] Factory default initiated on ReadyNASOS 6.1.6. - Interesting. I did a factory reset on my 104 with 6.1.6 the other day and my nodesize and leafsize are both 32768 ...
- LogicX
Are you running 6.1.6 on an Ultra (this is in your profile) ? - True. Don't hate me for running 6.1.6 on a RNDU6000 :oops:
vandermerwe wrote: LogicX
Are you running 6.1.6 on an Ultra (this is in your profile) ? - Are you sure that's the leafsize for /dev/md127 not /dev/md0. Can you PM the full contents of btrfs.log
In the logs what does os_version.log contain?
From your initrd.log it looks like you are still running a RC?
What services are you using? Are you using iSCSI?
Do you have any apps installed? - My apologies! Yes, I quoted /dev/md0 by mistake.
/dev/md127 says:
nodesize 32768
leafsize 32768
os_version.log: ReadyNASOS!!version=6.1.6,time=1390873255,arch=x86_64
I'm quite sure I upgraded to 6.1.6 final... but open to trying again if that does not appear to be the case.
no iSCSI
I have plex app installed
I use SMB, FTP, AFP, DLNA
I've managed to get to 80% usage; but my CPU usage spiked so high and never returned for hours -- I couldn't execute any commands and had to hard restart.
/dev/md127 11T 8.7T 2.3T 80% /datamdgm wrote: Are you sure that's the leafsize for /dev/md127 not /dev/md0. Can you PM the full contents of btrfs.log
In the logs what does os_version.log contain?
From your initrd.log it looks like you are still running a RC?
What services are you using? Are you using iSCSI?
Do you have any apps installed? - You are running RC13.
If you were running the final release os_version.log would look like this:
ReadyNASOS!!version=6.1.6,time=1391111179,arch=x86_64
When you run top do any of your services in particular (other than btrfs ones) stand out as using lots of CPU? - I can upgrade to final (but I'll wait to hear from you that I should since we're in the middle of troubleshooting)
Plex is often running and scanning -- but nothing too crazy.
I was just able to get it to almost lock up with a huge load due to lftp mirroring a directory to the server --
transfer started at 60MB/sec -- after a few seconds it slowed to kbs (halted, really) -- and I was SSH'd in -- wouldn't even execute my 'w' command to see the load. :/
After about 10 minutes the load finally dropped below 20 and it executed
I ran top to see a process md127_raid5 using a lot of CPU
Repeating the transfer with top running shows the following competing for CPU:
proftpd
md127_raid5
flush-btrfs-2
kswapd0
Load is holding around 5
Transfer going 30-35MB/sec
And now after a few minutes it locked up again.
Here's what top looks like: https://www.dropbox.com/s/08bus9zeiss1lds/Screenshot%202014-02-17%2001.30.32.png
Note the 99.5% wait
Then it finally refreshed 1 time a few minutes later:
https://www.dropbox.com/s/30r4ubjlxp9abzf/Screenshot%202014-02-17%2001.32.14.png
Many more minutes later as it finally recovered, it looked like:
https://www.dropbox.com/s/k9u5xsgy65rr637/Screenshot%202014-02-17%2001.35.14.png
(note the drastically reduced wait time, sky-high load which is dropping) - I would suggest updating to the final release. Shouldn't be many changes but better to troubleshoot on that than an old beta.
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