Re: RE: rate limit issues in Apache Http server (Apache Users)

On Thu, 2 Jun 2022, 22:14 Frank Gingras, <thumbs@xxxxxxxxxx> wrote:

300 is not really a high value, actually. A busy system can handle far more threads per child process.

What would be more useful is to see the output from /server-status

On Thu, 2 Jun 2022 at 12:33, Deepak Goel <deicool@xxxxxxxxx> wrote:
Looks like ThreadsPerChild is already high. What's your hardware configuration and its usage (when the error starts showing) too?

Deepak
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On Thu, Jun 2, 2022 at 9:35 PM Frank Gingras <thumbs@xxxxxxxxxx> wrote:
Based on the error, increase ThreadsPerChild.

You can also look at mod_ratelimit.

On Thu, 2 Jun 2022 at 04:18, Rathore, Rajendra <rarathore@xxxxxxx> wrote:

Also seen below errors in error.log file

[Thu Jun 02 12:04:38.863338 2022] [mpm_winnt:error] [pid 3488:tid 7984] AH00326: Server ran out of threads to serve requests. Consider raising the ThreadsPerChild setting

[Thu Jun 02 12:10:28.135335 2022] [ssl:debug] [pid 628:tid 1452] ssl_engine_io.c(1147): [client 10.85.41.123:34932] AH02001: Connection closed to child 117 with standard shutdown (server pwdcsv-wcump8d.ptcnet.ptc.com:443)

[Thu Jun 02 12:10:28.136337 2022] [reqtimeout:info] [pid 628:tid 2324] [client 10.85.41.123:34813] AH01382: Request header read timeout

Thanks and Regards,

Rajendra Rathore

9922701491

From: Rathore, Rajendra <rarathore@xxxxxxx>
Sent: Thursday, June 2, 2022 1:14 PM
To: users@xxxxxxxxxxxxxxxx
Subject: RE: rate limit issues in Apache Http server
Importance: High

External email from: users-return-121870-rarathore=ptc.com@xxxxxxxxxxxxxxxx

Hi Team,

Can you please suggest some Apache configuration settings to fix the below issue.

I have below configurations:

<IfModule mpm_worker_module>

StartServers        1

    MinSpareThreads     151

    MaxSpareThreads     300

    ThreadsPerChild     300

    ThreadLimit         300

    MaxRequestWorkers   300



    MaxConnectionsPerChild   0

</IfModule>

<IfModule mpm_event_module>

### Provide alternate settings instead [PTC]

    StartServers        1

    MinSpareThreads     151

    MaxSpareThreads     300

    ThreadsPerChild     300

    ThreadLimit         300

    MaxRequestWorkers   300

    MaxConnectionsPerChild   0

</IfModule>

<IfModule mpm_winnt_module>



    ThreadsPerChild     300



    MaxConnectionsPerChild   0

</IfModule>

Other timeout settings are defaults value, no changes.

Thanks and Regards,

Rajendra Rathore

9922701491

From: Rathore, Rajendra <rarathore@xxxxxxx>
Sent: Wednesday, June 1, 2022 3:36 PM
To: users@xxxxxxxxxxxxxxxx
Subject: rate limit issues in Apache Http server
Importance: High

External email from: users-return-121868-rarathore=ptc.com@xxxxxxxxxxxxxxxx

Hi Team,

We are facing rate limit issue in default Apache configuration, can you please suggest some solutions around it? Is this statement correct that OOTB apache can’t handle such situation, you need to rely on Firewall or some 3^rd party software for DOS prevention.

Thanks and Regards,

Rajendra Rathore

9922701491