Scénarios de test séquentiels pour les pages dynamiques
Dans ce chapitre, nous décrirons les différentes combinaisons de -n et -c avec les indicateurs importants pour augmenter progressivement la charge sur votre serveur Web.
Vous devez principalement vous concentrer sur la façon dont les métriques suivantes changent lorsque vous augmentez la charge -
- Requêtes par seconde
- Temps de connexion (ms)
- Pourcentage des demandes traitées dans un certain temps (ms)
Vous devriez également remarquer la valeur de seuil lorsque le serveur commence à se bloquer et que vous commencez à recevoir des demandes ayant échoué.
1 utilisateur simultané effectuant 100 visites de pages
Faisons 100 chargements de pages séquentiels par un seul utilisateur -
$ ab -l -r -n 100 -c 1 -k -H "Accept-Encoding: gzip, deflate" http://127.0.0.1:8000/Production
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 127.0.0.1 (be patient).....done
Server Software: Rocket
Server Hostname: 127.0.0.1
Server Port: 8000
Document Path: /
Document Length: Variable
Concurrency Level: 1
Time taken for tests: 0.045 seconds
Complete requests: 100
Failed requests: 0
Non-2xx responses: 100
Keep-Alive requests: 0
Total transferred: 27700 bytes
HTML transferred: 6600 bytes
Requests per second: 2206.24 [#/sec] (mean)
Time per request: 0.453 [ms] (mean)
Time per request: 0.453 [ms] (mean, across all concurrent requests)
Transfer rate: 596.80 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.0 0 0
Processing: 0 0 0.0 0 0
Waiting: 0 0 0.0 0 0
Total: 0 0 0.0 0 1
Percentage of the requests served within a certain time (ms)
50% 0
66% 0
75% 0
80% 0
90% 1
95% 1
98% 1
99% 1
100% 1 (longest request)5 utilisateurs simultanés effectuant chacun 10 visites de page
Ce cas correspond à une charge de pointe sur un site Web qui reçoit environ 50000 visites par mois.
$ ab -l -r -n 10 -c 5 -k -H "Accept-Encoding: gzip, deflate" http://127.0.0.1:8000/Dans les sorties suivantes, nous omettons l'en-tête commun à des fins de clarté.
Production
...
Requests per second: 2009.24 [#/sec] (mean)
Time per request: 2.488 [ms] (mean)
Time per request: 0.498 [ms] (mean, across all concurrent requests)
Transfer rate: 543.52 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 0.5 1 2
Processing: 0 1 0.5 1 2
Waiting: 0 1 0.5 1 1
Total: 2 2 0.4 3 3
ERROR: The median and mean for the total time are more than twice the standard
deviation apart. These results are NOT reliable.
Percentage of the requests served within a certain time (ms)
50% 3
66% 3
75% 3
80% 3
90% 3
95% 3
98% 3
99% 3
100% 3 (longest request)10 utilisateurs simultanés effectuant chacun 10 visites de page
Ce test correspond à 100 chargements de pages par 10 utilisateurs simultanés différents, chaque utilisateur effectue 10 chargements de pages séquentiels.
$ ab -r -n 10 -c 10 -k -H "Accept-Encoding: gzip, deflate" http://127.0.0.1:8000/Production
...
Requests per second: 2225.68 [#/sec] (mean)
Time per request: 4.493 [ms] (mean)
Time per request: 0.449 [ms] (mean, across all concurrent requests)
Transfer rate: 602.07 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 1 2 0.7 2 3
Processing: 0 2 1.0 2 3
Waiting: 0 1 1.0 2 3
Total: 4 4 0.3 4 4
WARNING: The median and mean for the waiting time are not within a normal deviation
These results are probably not that reliable.
Percentage of the requests served within a certain time (ms)
50% 4
66% 4
75% 4
80% 4
90% 4
95% 4
98% 4
99% 4
100% 4 (longest request)20 utilisateurs simultanés effectuant chacun 20 visites de page
Ce test correspond à 400 chargements de pages par 20 utilisateurs simultanés différents, chaque utilisateur effectue 20 chargements de pages séquentiels.
$ ab -r -n 20 -c 20 -k -H “Accept-Encoding: gzip, deflate” http://127.0.0.1:8000/Production
...
Requests per second: 1619.96 [#/sec] (mean)
Time per request: 12.346 [ms] (mean)
Time per request: 0.617 [ms] (mean, across all concurrent requests)
Transfer rate: 438.21 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 2 6 2.3 6 10
Processing: 1 5 2.9 5 10
Waiting: 0 5 2.9 5 9
Total: 10 11 0.6 11 12
Percentage of the requests served within a certain time (ms)
50% 11
66% 11
75% 12
80% 12
90% 12
95% 12
98% 12
99% 12
100% 12 (longest request)30 utilisateurs simultanés effectuant chacun 30 visites de page
Ce test correspond à 900 chargements de pages par 30 utilisateurs simultanés différents, chaque utilisateur effectue 30 chargements de pages séquentiels.
$ ab -r -n 30 -c 30 -k -H "Accept-Encoding: gzip, deflate" http://127.0.0.1:8000/Production
...
Requests per second: 2283.45 [#/sec] (mean)
Time per request: 13.138 [ms] (mean)
Time per request: 0.438 [ms] (mean, across all concurrent requests)
Transfer rate: 617.69 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 2 6 2.7 6 11
Processing: 1 6 3.1 6 11
Waiting: 0 5 3.2 5 10
Total: 11 12 0.5 12 13
Percentage of the requests served within a certain time (ms)
50% 12
66% 12
75% 12
80% 12
90% 13
95% 13
98% 13
99% 13
100% 13 (longest request)Nous avons maintenant appris à augmenter progressivement la charge sur le site et à tester ses performances.