zomo tech

httperf on Linux

Monday, 16. 04. 2012  –  Category: stash, sw

“httperf is a tool for measuring web server performance. It provides a flexible facility for generating various HTTP workloads and for measuring server performance.”

• Set open files to 65535 via ulimit -n
• Recompile httperf with /usr/include/bits/typesizes.h‘s __FD_SETSIZE dialled up to 65535¹
• Twiddle the TCP stack for faster socket recycling²³ :
  
echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse


1. http://gom-jabbar.org/articles/2009/02/04/httperf-and-file-descriptors [↩]
2. http://www.speedguide.net/articles/linux-tweaking-121 [↩]
3. http://serverfault.com/questions/331513/httperf-hangs-when-using-hog [↩]