184 reputation
1114
bio website ben-thomas.org
location Leicester, United Kingdom
age 28
visits member for 4 years, 6 months
seen Mar 17 at 10:11

PHP Developer, tech enthusiast, general geek!

Ben Thomas


Mar
24
awarded  Popular Question
Feb
28
awarded  Popular Question
Jan
12
awarded  Popular Question
Nov
19
awarded  Curious
Nov
19
comment Find out what NFSD processes are actually doing?
Sorry, thought I'd move my comment here before I realised you'd replied :) Thanks! I was able to track down the cause with tcpdump! It was caused by a stuck PHP script which happened to be accessing an NFS share on our second server. I don't think it was actually doing anything which is why it didn't really show in top, iotop, etc, but the amount of stuck processes on that mount seemed to be causing issues :) Thanks again!
Nov
19
accepted Find out what NFSD processes are actually doing?
Nov
19
comment Best way to kill Zombie and D state processes in linux
Thanks, this worked for an issue we had with a script stuck attempting to access a disappeared NFS mount for weeks :)
Nov
19
revised Find out what NFSD processes are actually doing?
Added more info from comments/answers.
Nov
19
comment Find out what NFSD processes are actually doing?
Interesting... a tcpdump | grep nfs is showing tons of activity between two of our servers, over nfs, but as far as I'm aware they shouldn't be. A lot of entries like: 13:56:41.120020 IP 192.168.0.20.nfs > 192.168.0.21.729: Flags [.], ack 4282288820, win 32833, options [nop,nop,TS val 627282027 ecr 263985319,nop,nop,sack 3 {4282317780:4282319228}{4282297508:4282298956}{4282290268:4282291716}], len
Nov
19
comment Find out what NFSD processes are actually doing?
Thanks! I've updated my original post with the output of a few of these. It's weird, as far as I can see with all of these, nothing much is happening nfs-wise.. so I have no idea why it's using CPU.
Nov
19
revised Find out what NFSD processes are actually doing?
added 757 characters in body
Nov
19
comment Find out what NFSD processes are actually doing?
For some reason I'm getting attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted Could not attach to process. If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf even though I'm running it as root?
Nov
19
asked Find out what NFSD processes are actually doing?
Nov
15
awarded  Popular Question
Nov
11
awarded  Tumbleweed
Nov
4
asked Dell OpenManage Web Interface Inaccessible
Oct
9
accepted Samsung 840 Pro SSDs in a Dell R720
Oct
9
accepted Set iDRAC IP Address on Ubuntu 12.04 without Reboot?
Oct
9
comment Set iDRAC IP Address on Ubuntu 12.04 without Reboot?
Was finally able to do this! Additionally, before a restart, I had to cd /opt/dell/srvadmin/sbin/ (for it to find the racadm commands) and sudo service dataeng start. Thank you so much! Saved us some downtime!
Oct
8
comment Set iDRAC IP Address on Ubuntu 12.04 without Reboot?
I installed srvadmin-idrac7 as root, but when I try and run any racadm command like ./racadm getsysinfo I just get ERROR: Unable to perform requested operation.