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 Topic: Clients requests with KeepAlive connections never served |
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Griffin
Joined: 14 Mar 2016
Posts: 1
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 Posted: Mon 14 Mar '16 13:30 Post subject: Clients requests with KeepAlive connections never served |
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I have 3000 clients using KeepAlive to connect to my Windows Apache server. Clients send GET request which expects a OK 200 HTTP response from server every 5 seconds concurrently.
Clients timeout after 4 seconds of sending the GET request if server does not response by that time.
With the below System information and Apache configuration I get 94 time outs out of 4553 GET requests sent within ~1 minute.
System Information:
OS Name: Microsoft Windows Server 2012 R2 Standard
Processor: Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz, 3200 Mhz, 4 Core(s), 4 Logical Processor(s)
Installed Physical Memory (RAM) 4.00 GB
Running Windows Apache HTTP 2.2.22 with winnt_mpm_module config:
| Code: | <IfModule mpm_winnt_module>
ThreadLimit 3600
ThreadsPerChild 3600
MaxRequestsPerChild 0
</IfModule> |
I have played around with the mpm_winnt_module. If I increase the number of ThreadsPerChild and ThreadLimit more than 3600 Apache warns:
WARNING: ThreadsPerChild of 15000 exceeds ThreadLimit value of 3600 threads,
lowering ThreadsPerChild to 3600. To increase, please see the
After increasing the timeout to something much higher I still get same number of timeouts which probably means those GET requests are never served by the server...
But even with current configuration I expect the server to handle the load, what am I missing so bad? |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7368
Location: Germany, Next to Hamburg
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| Posted: Tue 15 Mar '16 19:15 Post subject: |
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There is something missing in the error message
To increase, please see the |
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