On 3/28/2019 12:11 PM, Darryl Philip Baker wrote:
Gentlefolk,
I had an incident yesterday where the Apache web server host had a
load average of over 170 and was performing very slowly. Stopping the
web server did fix the issue but when I restarted the daemons the load
started to increase very quickly. I ended up having to reboot the
system to fix the issue. I don’t like that one bit, this is a Linux
system not a Windows server. (Editorial remark: I have found that
systems need reboots to fix stuff much more frequently since the
adoption of systemd) I have been asked to do a root cause analysis,
but I have not found anything as of yet. I am reaching out for help in
this matter.
The system is a RHEL7 ESX VM with the Red Hat’s main line distribution
of Apache 2.4 as opposed to the RHSCL version. The configuration is
quite complex and a bit sensitive so I cannot share all of that. What
I’m looking for is technics to look at what happened rather than being
given the answer anyway.
*Darryl Baker * (he/him/his)
Sr. System Administrator
Distributed Application Platform Services
*Northwestern University*
1800 Sherman Ave.
Suite 6-600 – Box #39
Evanston, IL 60201-3715
_darryl.ba...@northwestern.edu <mailto:darryl.ba...@northwestern.edu>_
(847) 467-6674
First thing would be to check request logs during time of high load. I
assume this is a public web server. Perhaps you were being probed heavily.
Jim
