Monthly Archives: October 2021

Nginx `nodelay` Option in Action

The nodelay option for limit_req can delay excessive requests but it’s not desired in some situations. I just found an intuitive way to show the difference while tweaking the GitHub Avatar proxy.

Every grid is an image loaded from GitHub avatar.

With nodelay:

Without nodelay:

So in my use case with nodelay option can make clients feel faster loading. But may hit request limit more easily. Without nodelay keep excessive requests in the burst bucket and load them in sequence. But clients may feel slow.

Remove Tencent Cloud (QCloud) Cloud Monitor 

bash /usr/local/qcloud/stargate/admin/uninstall.sh
bash /usr/local/qcloud/YunJing/uninst.sh
bash /usr/local/qcloud/monitor/barad/admin/uninstall.sh

rm -rf /usr/local/sa
rm -rf /usr/local/agenttools
rm -rf /usr/local/qcloud

process=(sap100 secu-tcs-agent sgagent64 barad_agent agent agentPlugInD pvdriver )
for i in ${process[@]}
do
  for A in $(ps aux | grep $i | grep -v grep | awk '{print $2}')
  do
    kill -9 $A
  done
done

# Optional
chkconfig --level 35 postfix off
systemctl stop postfix
systemctl mask postfix

Disable Vim Mouse on Debian

Recently I’m trying to switch from deprecated CentOS to Debian but found the default Vim configurations on Debian enables mouse option is driving me nuts. You can add the following option in /etc/vim/vimrc.local to disable it:

set ttymouse=