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11539
bio website serverfault.com
location Montreal, Canada
age 38
visits member for 4 years, 11 months
seen Dec 22 at 14:29

I am Linux and middleware administrator and seasonal php/python programmer.


Nov
21
comment LXC container not starting
Interesting link. This seems to be the problem. Thank you!
Nov
18
comment server's memory taken up almost to 8GB
I am very concerned by to processes that look suspicious: brute and minerd. I would also check what those perl scripts are running.
Nov
18
comment server's memory taken up almost to 8GB
It is normal the the command does not return anything. It would be a hardware or diver issue otherwise.
Nov
14
comment server's memory taken up almost to 8GB
Let us continue this discussion in chat.
Nov
14
comment server's memory taken up almost to 8GB
Check also if you have processes in uninterruptible sleep. Run as root user: grep "^State:.*D" /proc/*/status
Nov
14
comment server's memory taken up almost to 8GB
Most of the hosting companies offers console and/or SSH access.
Nov
14
comment server's memory taken up almost to 8GB
Those are terminal commands. Connect with ssh or PuTTY on your server and run the commands. Edit your question and add the output.
Nov
14
comment server's memory taken up almost to 8GB
Could you please add the first 10 lines of top command and vmstat 1 10, including the headers?
Nov
10
comment ISC DHCP infinite lease time
You could create a script that is adding all new hosts to the static lease list. This script could send you an email when you run out of IP addresses in that pool. Or send you an email each time a new IP/MAC was detected in the network. In this way you have the convenience of DHCP, you have the same IP assigned to the same NIC. And you have full control to change all this in a instant if you need it, and you can have static IPs too if you must. Modern DHCP server can be instructed to send an ARP request before assigning a lease for an IP.
Nov
5
comment ps aux hanging on high cpu/IO with java processes
This is a very good argument. Thank you for rising up. However I think that the chances for strace to start when your swap is not answering are low, but not impossible. I will update my answer.
Oct
22
comment All my harddrives are around 10 MB/s read/write
You can use strace -c cp .... to determine where the CPU time is spend (reads/writes vs userspace). Then you can use sysdig, ftrace/trace-cmd or sytemtap to see what is happening at the kernel level.
Oct
22
comment All my harddrives are around 10 MB/s read/write
So first determine what is the raw speed of the disk (both for linear and random operations), then compare it with the current speed.
Oct
22
comment All my harddrives are around 10 MB/s read/write
Are you moving it on the same disk, on another disk? The real speed vs disk raw speed could be affected (positively and negatively) by alignment, fragmentation, encryption, snapshot, compression, deduplication, caching, RAID level, mount options...
Sep
24
comment Server hacked and used for sending spam
The question should not be "whole server or just exim?", but rather "the whole VLAN or only the server?"
Aug
18
comment Memory Ram too high in HTTPD processes
I think you are not asking the right question. How did you determined that you have a memory usage problem? Could you add the output of cat /proc/meminfo? You can see how the virtual memory is mapped with pmap $PID or cat /proc/$PID/maps. Where $PID is the process ID that is using unexpected amounts of memory.
Jul
15
comment Why is this HTTP request being truncated?
Try to obtain a capture with a Network sniffer like Wireshark. Try to test with a different browser. Try also by booting and testing from a Linux live CD.
Jul
15
comment How to make “\n” a new line in terminal?
Yes, thank you. I edited the answer.
Jul
15
comment RHEL/Centos 6 Cluster multi-site configuration with Pacemaker and split brain situation
If you care about your data the cluster should be configured so that is not quorate when a split-brain occurs. Can you tell us which application or type of application you will install on the cluster? Which type of storage will you use? How do you plan to configure fencing?
Jul
15
comment How to make “\n” a new line in terminal?
Here it is: tail -f log_file | sed 's/\\n/\n/'
May
14
comment CGI scripts are not working on lighttpd with SSL
Could you list also mod_fastcgi.conf ?