-
,
?
Microsoft Bing:
: Eric Schurman (Bing) O'Reilly Velocity
Google
: Jake Brutlag (Google) O'Reilly Velocity
,
: ;
;
();
?
(application response time) -
(application availability) -
(throughput)
?
3
http://apmblog.compuware.com/2012/11/14/why-averages-suck-and-percentiles-are-great/
http://apmblog.compuware.com/2012/11/14/why-averages-suck-and-percentiles-are-great/
?
K- , , K% , .
50- .
90-
10%
90-
:
123456781017
423151787610
:
:
90- 10
:
95-
Apdex
Apdex (Application Performance Index) , , . www.apdex.org
Apdex .
Apdex
:NS = ( 0 );
NT = ( T F);
,
Apdex
E
G
F
P
U
Apdex :
:
() ?
N ?
N ?
Performance Testing :
t
rps
t
ms
50%
90%
95%
Performance testing :
$ ab -n 100 -c 20 http://localhost/Concurrency Level: 20Complete
requests: 100Failed requests: 0...Percentage of the requests served
within a certain time (ms) 50% 32 90% 50 95% 55 100% 65 (longest
request)
100 20 :
Performance Testing :
Apache Benchmark (ab)
Siege URL,
Tsung , .
Jmeter .
Blazemeter Jmeter .
Tsung -
: /
:
Google Page Speed
Yahoo Yslow
GTmetrix
:
Timeline
:
Gzip
Cookie-less
SS/JS
CDN
JS
-
, ,
Apdex
Browser Traces
Application Traces
Database Traces
Collectd + RRD
Statd + Graphite
Performance Related Changes and their User Impact
http://velocityconf.com/velocity2009/public/schedule/detail/8523
Common Metrics for Application Performance Measurement
http://www.ietf.org/proceedings/46/slides/rmonmib-waldbusser-slides/sld001.htm
Apdex http://www.gilev.ru/apdex-teoriya/
. , .
http://sqagroup.spb.ru/reports/report-load-testing-from-testing-pov/
?
