[httperf] Connection rate is very low

Vikash Kumar vikash.kumar at oneconvergence.com
Mon Oct 22 04:43:21 PDT 2012


Hi all,

   I am doing httperf test but I am getting very less *connection rate. *Below
is the command and O/P of the command:

httperf --hog --client=0/1 --server=39.0.0.1 --port=80 --uri=/1kb
--rate=15000 --send-buffer=4096 --recv-buffer=16384 --num-conns=15000
--num-calls=1
Maximum connect burst length: 26

Total: connections 15000 requests 9614 replies 9589 test-duration 39.149 s

Connection rate: 383.1 conn/s (2.6 ms/conn, <=12651 concurrent connections)
Connection time [ms]: min 2.8 avg 4765.6 max 38926.4 median 3202.5 stddev
4236.4
Connection time [ms]: connect 9995.9
Connection length [replies/conn]: 1.000

Request rate: 245.6 req/s (4.1 ms/req)
Request size [B]: 64.0

Reply rate [replies/s]: min 0.0 avg 273.8 max 1157.2 stddev 430.1 (7
samples)
Reply time [ms]: response 931.1 transfer 0.2
Reply size [B]: header 174.0 content 733.0 footer 0.0 (total 907.0)
Reply status: 1xx=0 2xx=6553 3xx=0 4xx=35 5xx=3001

CPU time [s]: user 12.21 system 26.94 (user 31.2% system 68.8% total 100.0%)
Net I/O: 232.5 KB/s (1.9*10^6 bps)

Errors: total 5411 client-timo 0 socket-timo 5386 connrefused 0 connreset 25
Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0


  All the request are going through *Haproxy. * Configuration of the
Haproxy host m/c is:
   OS : Ubuntu 10.04
   Model name: Intel(R) Xeon(R) CPU E5504  @ 2.00GHz
   HA-Proxy version 1.4.22
   No.of CPU's : 8

   My server and client m/c's are 8 cores. I am using *lighttpd* as server.

   My FD_LIMIT is 400000.
   I had increased  number of sockets at optimum figure.


   Why I am getting such a small *conn. rate, req. rate and reply rate?  *
*
*
*  **  *When the same test is done for back- to back connection ie. without
Haproxy, then I am able to achieve 27K *conn. rate, req. rate and reply rate
*.

 Can  anybody help me with this?

Thanx,
Vikash
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