Ab
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Benchmark Performance Apache
Apache "ab" tool dapat digunakan untuk mengukur berapa request per second yang dapat di tangani oleh apache yang kita install. Di Debian termasuk dalam paket "apache2-utils"
Instalasi ab
apt-get install apache2-utils tcpdump
Normal Benchmark
ab -kc 20 -t 60 http://192.168.0.100/index.html
Dimana
-c banyaknya connections -k HTTP Keep-Alive -t detik setiap connection harus alive
Hasilnya:
This is ApacheBench, Version 2.3 <$Revision: 1528965 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.0.100 (be patient) Completed 5000 requests Completed 10000 requests Completed 15000 requests Completed 20000 requests Completed 25000 requests Completed 30000 requests Completed 35000 requests Completed 40000 requests Completed 45000 requests Completed 50000 requests Finished 50000 requests Server Software: Apache/2.4.7 Server Hostname: 192.168.0.100 Server Port: 80 Document Path: /index.html Document Length: 11510 bytes
Concurrency Level: 20
Time taken for tests: 48.136 seconds
Complete requests: 50000
Failed requests: 0
Keep-Alive requests: 49516
Total transferred: 590928707 bytes
HTML transferred: 575500000 bytes
Requests per second: 1038.71 [#/sec] (mean)
Time per request: 19.255 [ms] (mean)
Time per request: 0.963 [ms] (mean, across all concurrent requests)
Transfer rate: 11988.40 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.2 0 11
Processing: 1 19 14.2 19 109
Waiting: 0 13 10.3 11 93
Total: 1 19 14.2 19 109
Percentage of the requests served within a certain time (ms)
50% 19
66% 26
75% 30
80% 32
90% 38
95% 43
98% 49
99% 53
100% 109 (longest request)
Flood Test
Mencoba untuk "flood" test, mengirim request (-n) misalnya 5000 dan concurrent connections (-c) misalnya 2000.
ab -n 10000 -c 400 http://192.168.0.100/index.html
Hasilnya:
This is ApacheBench, Version 2.3 <$Revision: 1528965 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.0.100 (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: Apache/2.4.7 Server Hostname: 192.168.0.100 Server Port: 80 Document Path: /index.html Document Length: 11510 bytes Concurrency Level: 400 Time taken for tests: 7.447 seconds Complete requests: 10000 Failed requests: 0 Total transferred: 117830000 bytes HTML transferred: 115100000 bytes Requests per second: 1342.82 [#/sec] (mean) Time per request: 297.882 [ms] (mean) Time per request: 0.745 [ms] (mean, across all concurrent requests) Transfer rate: 15451.55 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 1 112 248.7 51 3076 Processing: 13 173 172.1 127 2376 Waiting: 8 151 161.3 111 2317 Total: 42 285 306.9 188 3407 Percentage of the requests served within a certain time (ms) 50% 188 66% 221 75% 266 80% 314 90% 474 95% 1157 98% 1219 99% 1317 100% 3407 (longest request)
Cek tcpdump
Jika keluaran ab mencurigakan, kita bisa melihat reply di tcpdump. Terutama kita perlu menangkap reply tcp-rst yang muncul
tcpdump -nn 'tcp[tcpflags] == tcp-rst' and port 80
Hasilnya:
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 17:46:40.209978 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210022 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210092 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210276 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210325 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210418 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210522 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210566 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0 17:46:40.210863 IP 192.168.0.101.36311 > 192.168.0.100.80: Flags [R], seq 2078245274, win 0, length 0
Kalau kita hanya tertarik pada tcp-rst reply dari server, gunakan:
tcpdump -nn 'tcp[tcpflags] == tcp-rst' and port 80 and src host 192.168.0.100
dimana 192.168.0.100 adalah IP server.