Most large B2C enterprises perform, holiday readiness to make sure the site remains stable and can handle the holiday web traffic smoothly. As a part of the exercise multiple load test runs are performed and usually monitored in a performance environment with production data and any bottle necks and performance issues found during this are fixed.
Important Analysis pointers:
Java Garbage collection: If there are increases in response time in bursts. it can be attributed to Garbage collection.
The graphs for hits per second should follow a similar pattern to Throughput otherwise there is something in
Correlating failed transactions with errors.
Monitor CPU/IO/Memory during load tests: It is a good idea to run this every 30 seconds for the duration of the load tests. This is for App server and DB server.
vmstat - reports information about processes, memory, paging, block IO, traps, and cpu activity
iostat - Used for reporting CPU statistics and input/output statistics for devices, partitions and network filesystems (NFS)
Load Runner has 3 main components:
VU Gen (Virtual User Generator)
--Load generators are installed on multiple machines to spread the load for generating the traffic.
--Depending on the traffic required, this could change but usually 3-5
Load Runner Controller (Console)
--This is the main terminal that can be used to connect to consoles , Load scripts and run load runner tests.
Analysis
--This is used to view multiple charts and graphs for analysis data points from tests run.
Some Key Terminology when using Load Runner:
Virtual User & Distribution of virtual users: Virtual users are used to emulate the behavior of real users.
Transaction Mix: This is based on business scenarios. Usually this is divided among-st various scripts based on traffic patterns from web analytics (Omniture\Google\CoreMetrics, etc any of these)
Ramp up\Ram down: The load on the performance site is gradually increased and gradually decreased. Gradually increasing helps with cached pages for accurate test results.
Load is usually gradually increased and usually a 2-3 interval is provided to add virtual users.
Thinking Time: This is the time between 2 actions. In trying to emulate human behavior, it is the time, human takes to think between page clicks.
Total Duration of test = RampUp+Duration of load test+RampDown
Key Analysis parameters:
Response Time per Transaction: Time taken for the application to complete a transaction or a business scenario. This time includes Network Transmission+ Network Latency+Web Server processing time+App Server Processing time+ DB server Processing time.
This is very helpful parameter to determine during peak loads, who the system would really behave
Hits/Second: Number of requests hitting webs server per second. This is helpful in conjunction with transaction time to see, how the performance of the site behaves as the number of hits/sec increases.
Through Put: Is the amount of data in kilobytes received by a user per second
HTTP Response Counts: Most valid responses are 200, 303 (redirection) and It is a good idea to keep the tab on 403 (forbidden), 404 (page not found), 500 (Internal server error)
Error count: Keeps track of error counts, this is a good measure to make sure there are no application server errors, This is really helpful, if the correct build and database changes are not present in performance.
Important Analysis pointers:
Java Garbage collection: If there are increases in response time in bursts. it can be attributed to Garbage collection.
The graphs for hits per second should follow a similar pattern to Throughput otherwise there is something in
Correlating failed transactions with errors.
Monitor CPU/IO/Memory during load tests: It is a good idea to run this every 30 seconds for the duration of the load tests. This is for App server and DB server.
iostat - Used for reporting CPU statistics and input/output statistics for devices, partitions and network filesystems (NFS)
Load Runner has 3 main components:
VU Gen (Virtual User Generator)
--Load generators are installed on multiple machines to spread the load for generating the traffic.
--Depending on the traffic required, this could change but usually 3-5
Load Runner Controller (Console)
--This is the main terminal that can be used to connect to consoles , Load scripts and run load runner tests.
Analysis
--This is used to view multiple charts and graphs for analysis data points from tests run.
Some Key Terminology when using Load Runner:
Virtual User & Distribution of virtual users: Virtual users are used to emulate the behavior of real users.
Transaction Mix: This is based on business scenarios. Usually this is divided among-st various scripts based on traffic patterns from web analytics (Omniture\Google\CoreMetrics, etc any of these)
Ramp up\Ram down: The load on the performance site is gradually increased and gradually decreased. Gradually increasing helps with cached pages for accurate test results.
Load is usually gradually increased and usually a 2-3 interval is provided to add virtual users.
Thinking Time: This is the time between 2 actions. In trying to emulate human behavior, it is the time, human takes to think between page clicks.
Total Duration of test = RampUp+Duration of load test+RampDown
Key Analysis parameters:
Response Time per Transaction: Time taken for the application to complete a transaction or a business scenario. This time includes Network Transmission+ Network Latency+Web Server processing time+App Server Processing time+ DB server Processing time.
This is very helpful parameter to determine during peak loads, who the system would really behave
Hits/Second: Number of requests hitting webs server per second. This is helpful in conjunction with transaction time to see, how the performance of the site behaves as the number of hits/sec increases.
Through Put: Is the amount of data in kilobytes received by a user per second
HTTP Response Counts: Most valid responses are 200, 303 (redirection) and It is a good idea to keep the tab on 403 (forbidden), 404 (page not found), 500 (Internal server error)
Error count: Keeps track of error counts, this is a good measure to make sure there are no application server errors, This is really helpful, if the correct build and database changes are not present in performance.
Good information.Tahnk you very much.How controler works in Loadrunner? any idea?
ReplyDeleteController is one of the core components of Load Runner and is used to design the load scenario (Creating and configuring different kind of scenarios manual/goal oriented), Control Virtual users, invoke/stop the tests (runs), monitor the runs. This was more of a high level view, if you want to go into details. Please find the link below:
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우리카지노는 대한민국의 바카라 업계를 장악하고 있는 카지노사이트 입니다. 우리카지노가 대한 민국에서 장악한 바카라 시장점유율이 50%가 넘고 10 년 넘게 온라인 바카라 시장을 장악해왔기
ReplyDelete때문에 대한민국에서는 우리카지노를 모르는 사람은 드뭅니다. 이런 바카라 업계의 독보적인 입지 때문에 늘 유명하거나 최고만을 찾는 사람들이 카지노사이트를 찾을때는 늘 우리카지노를 찾습니다.바카라를 처음 시작하시는 초보자분들에게도 우리카지노에서 카지노사이트를 시작하시기 좋은 환경입니다. 우리카지노사이트에서는 신규가입시 3 만쿠폰을 지급 해주기 때문입니다. 사람들이 늘 1 등만을 찾는 이유는 분명 있습니다. 다른 카지노사이트와는 달리 우리카지노를 이용하실시 에이전트를 끼고 게임을 하신다면 본사 이외에 활동쿠폰 및 오링쿠폰을 별도로 제공해주고 있기 때문입니다. 이러한 이유들 때문에 카지노사이트
업계에서 바카라를 즐기신다면 다들 우리카지노를 선호 하십니다.
카지노사이트에서 바카라를 이기기 물론 어렵습니다. 하지만 우리카지노의 에이전트를 끼고 바카라를 즐기신다면 승산이 있다고 봅니다. 우리카지노 에이전트의 연락처는 홈페이지로 연락하시면 언제든지 부담없이 소통가능 합니다. 카지노사이트를 선정할때는 바카라를 다른곳보다 유리하게 즐길 수 있는 카지노를 선택해야한다고 생각합니다. 그것이 바로 우리카지노 입니다. 이상으로 우리카지노와 바카라 카지노사이트 사이의 상관관계를 알아보았습니다바카라사이트.
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