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 Topic: Concurrent connections problem |
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| Author |
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Virsacer
Joined: 16 Jan 2010
Posts: 108
Location: Germany, Darmstadt
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 Posted: Mon 25 May '15 12:25 Post subject: Concurrent connections problem |
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Hey guys,
I have a little problem (on my Raspberry) with the maximum concurrent connections:
When I open multiple tabs of a webpage which keeps persistent connections, apache is unable to serve more requests.
Here is the (shortened) mod_info output (which also takes some time till there is a process kind enough to serve the request):
| Code: | Server Version: Apache/2.4.10 (Raspbian) OpenSSL/1.0.1k
Server MPM: prefork
5 requests currently being processed, 9 idle workers
.___W____WWW_..W_...............................................
................................................................
......................
Srv PID Acc M CPU SS Req Conn Child Slot Client VHost Request
0-0 - 0/0/3 . 0.63 3878 0 0.0 0.00 0.09 ::1 Apache:80 OPTIONS * HTTP/1.0
1-0 3372 0/10/10 _ 1.58 0 120107 0.0 1.17 1.17 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Graphs;since=143
2-0 3373 0/11/11 _ 0.13 125 120118 0.0 0.02 0.02 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Automation;since
3-0 3374 0/10/10 _ 0.42 129 550845 0.0 1.15 1.15 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=all;since=143254
4-0 3375 0/7/7 W 1.92 187 0 0.0 2.20 2.20 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=all;since=143254
5-0 3379 0/10/10 _ 1.03 125 120118 0.0 1.28 1.28 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Graphs;since=143
6-0 3394 0/29/29 _ 1.08 0 120120 0.0 1.17 1.17 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Automation;since
7-0 3395 0/84/84 _ 1.62 82 120082 0.0 2.56 2.56 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=;since=1432546628.158
8-0 3406 0/19/19 _ 1.03 189 614286 0.0 3.39 3.39 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Devices;since=14
9-0 3407 0/36/36 W 1.11 0 0 0.0 1.17 1.17 127.0.0.1 Apache:443 GET /server-status HTTP/1.1
10-0 3408 0/17/17 W 0.43 77 0 0.0 1.09 1.09 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=;since=1432546753.219
11-0 3409 14/14/14 W 0.07 4123 0 22.0 0.02 0.02 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=SYSTEM;since=143
12-0 3413 0/18/18 _ 0.15 207 120018 0.0 0.06 0.06 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=;since=1432546503.002
13-0 - 0/0/1 . 0.00 4031 1 0.0 0.00 0.00 ::1 Apache:80 OPTIONS * HTTP/1.0
14-0 - 0/0/1 . 0.00 4030 0 0.0 0.00 0.00 ::1 Apache:80 OPTIONS * HTTP/1.0
15-0 3416 0/9/9 W 1.48 249 0 0.0 1.10 1.10 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Devices;since=14
16-0 3417 0/9/9 _ 1.04 250 120145 0.0 1.10 1.10 127.0.0.1 Apache:443 GET /fhem?XHR=1&inform=type=status;filter=room=Graphs;since=143
17-0 - 0/0/1 . 0.00 3961 0 0.0 0.00 0.00 ::1 Apache:80 OPTIONS * HTTP/1.0
18-0 - 0/0/1 . 0.00 4003 1 0.0 0.00 0.00 ::1 Apache:80 OPTIONS * HTTP/1.0 |
When I understood it correctly, apache should spawn new processes (up to MaxRequestWorkers=150)
But there are idle???? processes, so it wont add new ones?
I dont think it has to do with mod_proxy (used for the webpage) since the mod_info output is affected as well...
Any ideas?
Thanks! |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7443
Location: EU, Germany, Next to Hamburg
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| Posted: Tue 26 May '15 17:55 Post subject: |
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| Quote: | | 5 requests currently being processed, 9 idle workers |
there are 9 free slots / free processes.
You might monitor with htop over ssh the cpu usage in that case.
Do you use apache as reverse proxy?
You may also post your mpm settings. |
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