12,312 reputation
31834
bio website zcentric.com
location San Francisco, CA
age 35
visits member for 5 years, 3 months
seen 4 hours ago

I'm a Linux sys admin by trade and a programmer by hobby.


Nov
7
answered ps aux hanging on high cpu/IO with java processes
Nov
6
awarded  Benefactor
Nov
3
answered FTP: ls timeout, even in passive mode
Nov
3
answered Recommended TCP keepalive settings for a busy server
Nov
1
comment Can't block spammy IP
glad you got to the bottom of it
Oct
31
comment How to configure a server with nginx on for load balancing only?
are your backend servers listening to port 80 for incoming requests?
Oct
31
answered How to configure a server with nginx on for load balancing only?
Oct
30
answered What version of OpenSSL does SendMail use and how is this maintained?
Oct
30
accepted ps aux hanging on high cpu/IO with java processes
Oct
30
comment ps aux hanging on high cpu/IO with java processes
looks like the tuned and disabling the hugepage helped fix the problem!
Oct
30
comment ps aux hanging on high cpu/IO with java processes
here's what I got [always] madvise never
Oct
30
comment ps aux hanging on high cpu/IO with java processes
we had some servers with dead disks but it happens on servers that are fine. 2.6.32-358.23.2.el6.x86_64
Oct
30
comment ps aux hanging on high cpu/IO with java processes
auditd is not running.. it was when I started at the company everywhere which was a giant issue they were running into though.
Oct
30
comment ps aux hanging on high cpu/IO with java processes
That's the strange part.. I don't see timeouts anywhere and the system is still pretty responsive. Just anything accessing the process tree will hang.
Oct
30
revised ps aux hanging on high cpu/IO with java processes
added 666 characters in body
Oct
30
comment ps aux hanging on high cpu/IO with java processes
I'm getting the datacenter to call me to see if they know what the raid controller is set to for write cache. As for card its a 3a0613065fa Adaptec \ 71605 \ SATA/SAS RAID I verified they are SATA drives also Western Digital WD RE WD4000FYYZ
Oct
30
revised ps aux hanging on high cpu/IO with java processes
added 1619 characters in body
Oct
30
revised ps aux hanging on high cpu/IO with java processes
added 2 characters in body
Oct
30
comment ps aux hanging on high cpu/IO with java processes
there's a raid card but its just used for handling 12 drives on the server. Its part of a Hadoop cluster so it does a lot of writing but also these lock ups come in place when yarn is pulling a lot of data for a map reduce job.
Oct
30
comment ps aux hanging on high cpu/IO with java processes
I made some edits with specs and what the load is