■ab(Apache HTTP server benchmarking tool)を試してみる。 $ man ab | grep -A 1 NAME NAME ab - Apache HTTP server benchmarking tool $ ab -V This is ApacheBench, Version 2.3 <$Revision: 1604373 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ ■apache2-utilsパッケージに含まれているバージョンを使用。 $ whereis -b ab | awk '{print "apt-file search "$NF}' | sh | grep apache apache2-dbg: /usr/lib/debug/usr/bin/ab apache2-utils: /usr/bin/ab $ sudo apache2ctl -v Server version: Apache/2.4.10 (Debian) Server built: Nov 28 2015 14:05:48 ■リクエスト数(-n)と平行処理数(-c)を指定する。 $ ab -h 2>&1 | grep " *\-[nc] [a-z]" -n requests Number of requests to perform -c concurrency Number of multiple requests to make at a time ■実際の同時接続数が2000では無い点に注意。 $ ab -n 65535 -c 2000 http://172.31.31.100/ This is ApacheBench, Version 2.3 <$Revision: 1604373 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 172.31.31.100 (be patient) Completed 6553 requests Completed 13106 requests Completed 19659 requests Completed 26212 requests Completed 32765 requests Completed 39318 requests Completed 45871 requests Completed 52424 requests Completed 58977 requests apr_pollset_poll: The timeout specified has expired (70007) Total of 64446 requests completed ■プロセス数は1。同時接続数は常に一定では無い。 $ while true ;do \ echo -n "$(date '+%Y%m%d_%H%M%S')"; \ netstat -an | awk 'BEGIN{n=0}/:80 *EST/{n+=1}END{printf ",%s,",n}'; \ ps -ef | awk 'BEGIN{c=0}/a[b] -n/{c+=1}END{print c}'; \ sleep 0.5; \ done | tee -a check.log 20160328_010317,443,1 20160328_010318,452,1 20160328_010319,590,1 20160328_010320,639,1 20160328_010321,624,1 20160328_010322,519,1 20160328_010323,831,1 20160328_010324,885,1 20160328_010325,805,1 20160328_010326,1104,1 20160328_010326,1261,1 20160328_010327,818,1 20160328_010328,542,1 20160328_010329,799,1 20160328_010331,965,1 20160328_010332,895,1 20160328_010333,867,1 20160328_010333,1089,1 20160328_010334,1089,1 20160328_010335,1089,1 20160328_010335,1435,1 20160328_010336,1435,1 20160328_010337,1435,1 20160328_010337,1435,1 20160328_010338,1435,1 20160328_010339,1435,1 20160328_010339,1435,1 20160328_010340,1435,1 20160328_010341,1435,1 20160328_010341,1435,1 20160328_010342,1435,1 20160328_010343,1435,1 20160328_010343,1435,1 20160328_010344,1435,1 20160328_010345,1435,1 20160328_010345,1435,1 20160328_010346,1435,1 20160328_010347,1435,1 20160328_010347,1435,1 20160328_010348,1434,1 20160328_010348,1433,1 20160328_010349,1430,1 20160328_010350,1429,1 20160328_010350,1429,1 20160328_010351,1429,1 20160328_010352,1429,1 20160328_010352,1429,1 20160328_010353,1429,1 20160328_010354,1429,1 20160328_010354,1429,1 20160328_010355,1429,1 20160328_010356,1429,1 20160328_010356,1429,1 20160328_010357,1429,1 20160328_010358,1429,1 20160328_010358,1429,1 20160328_010359,1429,1 20160328_010400,1429,1 20160328_010400,1429,1 20160328_010401,1429,1 20160328_010402,1429,1 20160328_010402,1429,1 20160328_010403,1429,1 20160328_010404,1429,1 20160328_010404,1429,1 20160328_010405,1429,1 20160328_010406,0,0 20160328_010406,0,0 20160328_010407 ^C ■同時接続数は平均1244。 欲しい同時接続数の約1.62倍が並列数になる想定。 $ awk -F, 'BEGIN{a=0;i=9999}\ {if($2>0){cnt+=1;sum+=$2;if(a<$2){a=$2};if(i>=$2)i=$2}}\ END {print "Total:"sum,"Count:"cnt,"AVG:"sum/cnt,"max:"a,"min:"i}' \ check.log Total:82164 Count:66 AVG:1244.91 max:1435 min:443 $ awk -F, 'BEGIN{a=0;i=9999}\ {if($2>0){cnt+=1;sum+=$2;if(a<$2){a=$2};if(i>=$2)i=$2}} \ END {print "Total:"sum,"Count:"cnt,"AVG:"sum/cnt,"max:"a,"min:"i}' \ check.log Total:82164 Count:66 AVG:1244.91 max:1435 min:443 ■100%未満の時にしか使えない計算式どの位の指定が必要かを計算。 $ echo "1244 2000" | \ awk '{a=($1/$2*100);b=(1+(a/100))*$2}\ END{print a"%\n"1+(a/100)"\nab -n 65535 -c "b}' 62.2% 1.622 ab -n 65535 -c 3244 ■「-c 3244」で再テストしてみる。 $ ab -n 65535 -c 3244 http://172.31.31.100/ This is ApacheBench, Version 2.3 <$Revision: 1604373 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 172.31.31.100 (be patient) Completed 6553 requests Completed 13106 requests Completed 19659 requests Completed 26212 requests Completed 32765 requests Completed 39318 requests Completed 45871 requests Completed 52424 requests Completed 58977 requests apr_socket_recv: Connection reset by peer (104) Total of 64490 requests completed $ while true ;do \ echo -n "$(date '+%Y%m%d_%H%M%S')"; \ netstat -an | awk 'BEGIN{n=0}/:80 *EST/{n+=1}END{printf ",%s,",n}'; \ ps -ef | awk 'BEGIN{c=0}/a[b] -n/{c+=1}END{print c}'; \ sleep 0.5; \ done | tee check.log 20160328_011337,0,0 20160328_011338,0,0 20160328_011338,0,0 20160328_011339,0,0 20160328_011339,0,0 20160328_011340,315,1 20160328_011340,1000,1 20160328_011341,789,1 20160328_011342,2480,1 20160328_011343,2957,1 20160328_011344,2840,1 20160328_011345,2462,1 20160328_011346,2138,1 20160328_011347,2329,1 20160328_011348,2170,1 20160328_011349,2404,1 20160328_011350,2113,1 20160328_011351,2139,1 20160328_011352,1565,1 20160328_011353,1863,1 20160328_011354,2231,1 20160328_011355,2107,1 20160328_011356,2392,1 20160328_011357,2408,1 20160328_011357,2200,1 20160328_011358,2126,1 20160328_011359,2076,1 20160328_011359,2050,1 20160328_011400,1970,1 20160328_011401,0,0 20160328_011401,0,0 20160328_011402,0,0 ^C ■ほぼ計算通り。 $ awk -F, 'BEGIN{a=0;i=9999}\ {if($2>0){cnt+=1;sum+=$2;if(a<$2){a=$2};if(i>=$2)i=$2}} \ END {print "Total:"sum,"Count:"cnt,"AVG:"sum/cnt,"max:"a,"min:"i}' \ check.log Total:49124 Count:24 AVG:2046.83 max:2957 min:315 ■リクエスト数は割りきれなくても良い想定だけど、 あえて整数倍を指定するなら以下で求める。 $ echo "65535 3244" | awk '{print $1/$2,$2*21,$2*21}' 20.2019 68124 68124 $ ab -n 68124 -c 3244 http://172.31.31.100/ This is ApacheBench, Version 2.3 <$Revision: 1604373 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 172.31.31.100 (be patient) Completed 6812 requests Completed 13624 requests Completed 20436 requests Completed 27248 requests Completed 34060 requests Completed 40872 requests Completed 47684 requests Completed 54496 requests Completed 61308 requests apr_socket_recv: Connection reset by peer (104) Total of 66192 requests completed $ awk -F, 'BEGIN{a=0;i=9999}\ {if($2>0){cnt+=1;sum+=$2;if(a<$2){a=$2};if(i>=$2)i=$2}}\ END {print "Total:"sum,"Count:"cnt,"AVG:"sum/cnt,"max:"a,"min:"i}' \ check.log Total:65736 Count:32 AVG:2054.25 max:2949 min:247 ■トータルリクエストに対しての成功率と失敗率ということで良いのかな。。。 apache2側のログの数とも異なるので、 タイムアウト値等の調整が必要みたい。。。 $ echo "66192 68124" | awk '{print $1/$2*100"\n"(1-$1/$2)*100}' 97.164 2.836 $ awk '!/0,0/' check.log | awk '{if(NR==1){print}else{a=$0}}END{print a}' 20160328_013848,280,1 20160328_013913,2931,1 $ sudo awk '/01:3[89]/{a[$(NF-3)]+=1}END{for (n in a){print a[n],n}}' /var/log/apache2/access.log 67812 200 $ echo "67812 68124" | awk '{print $1/$2*100"\n"(1-$1/$2)*100}' 99.542 0.457988 ■「-t」を付けると、そもそも結果が異なるので、後日検討し直し。 $ ab -t 10 -n 65535 -c 2000 http://172.31.31.100/ This is ApacheBench, Version 2.3 <$Revision: 1604373 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 172.31.31.100 (be patient) Completed 6553 requests Completed 13106 requests Completed 19659 requests Completed 26212 requests Completed 32765 requests Completed 39318 requests Completed 45871 requests Finished 47129 requests Server Software: Apache/2.4.10 Server Hostname: 172.31.31.100 Server Port: 80 Document Path: /index.html Document Length: 11104 bytes Concurrency Level: 2000 Time taken for tests: 10.006 seconds Complete requests: 47129 Failed requests: 0 Total transferred: 538226708 bytes HTML transferred: 525253630 bytes Requests per second: 4710.02 [#/sec] (mean) Time per request: 424.626 [ms] (mean) Time per request: 0.212 [ms] (mean, across all concurrent requests) Transfer rate: 52529.12 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 228 634.7 21 7033 Processing: 2 120 290.2 50 6679 Waiting: 1 98 287.4 28 6666 Total: 11 348 708.2 78 7083 Percentage of the requests served within a certain time (ms) 50% 78 66% 114 75% 178 80% 289 90% 1112 95% 1563 98% 3072 99% 3254 100% 7083 (longest request)
