HTTP.NIO Performance problems
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Key: HTTPCORE-287
URL: https://issues.apache.org/jira/browse/HTTPCORE-287
Project: HttpComponents HttpCore
Issue Type: Task
Components: HttpCore NIO
Affects Versions: 4.1.1, 4.1.4
Reporter: ivan lappo
I use DefaultConnectiongIOReactor to request connection. When i receive
connection i submit http request for it. After receiving responce, i release it
for new requets. I constantly increase number of requests executed per minute
on the chart there are few params shown with discretisation 15 seconds - green
- number of requests executed, red - average responce time (between
connection.requestOutput() method and received responce, sky-blue - number of
requests that failed to execute because of connection being closed). Horisontal
axis represents timeline, Left vertical axis - values of these charts. I
monitored state of my machine using mvstat and it shows for first 10 minutes
4-10 % CPU, 35-40 after. This was tested on m1.small amazon instance. With
c1.medium (which has 4 times more computation CPU power) it behaves the same,
but with upper bound of 16000 requests per 15 seconds (against 5000 on weeker
machine) - therefore it is not networking problem.
What can cause such behaviour, and what can i do to improve performance?
(http://www.freeimagehosting.net/eba15) - link to image
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