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<p>Is an IPv4 or IPv6 change a factor?<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/6/22 2:39 am, Tamil Vendhan
Kanagarasu wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAM1guwBEbhZRdwzb7GCmAfJLW6L3wZ6_h8bw_OOgNLop9hPQbw@mail.gmail.com">
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<div dir="ltr">Hello everyone,
<div><br>
</div>
<div>We have been using Nginx for a few months now.</div>
<div>It was great until this week. For unknown reasons, response
times got higher.</div>
<div>Like 2 minutes, 3 minutes higher from what was < 300ms
before. </div>
<div><br>
</div>
<div>No change on nginx configuration side. </div>
<div>Mostly, I use the configuration unchanged from apt install.</div>
<div>Only the following settings are added</div>
<div><br>
</div>
<div>```</div>
<div><br>
# Max size of request<br>
client_max_body_size 100M;<br>
<br>
# Max request headers size<br>
client_header_buffer_size 5120k;<br>
<br>
# <br>
large_client_header_buffers 16 5120k;<br>
<br>
# Server name size<br>
server_names_hash_bucket_size 128;<br>
<br>
server_tokens off; # removed pound sign<br>
more_set_headers 'Server: <a href="http://helptap.com"
moz-do-not-send="true">helptap.com</a>';<br>
</div>
<div>```</div>
<div><br>
</div>
<div>The setup is as follows:</div>
<div>1. Nginx is configured to deliver some static files.</div>
<div>2. Nginx is configured to work as reverse proxy. Upstream
communications are done over websocket.</div>
<div>3. SSL is used for all communications. SSL is done using
letsencrypt.</div>
<div><br>
</div>
<div>I timed the upstream & able to confirm that they
respond with in < 50ms in all the cases.</div>
<div>In the browser, I receive them many seconds and in many
cases minutes later.</div>
<div>This issue is observed with both static file serving, http
requests & websocket messages.</div>
<div>So, I am sure that, it is not upstream issue, as static
files also takes > 2 minutes to receive in one case. </div>
<div><br>
</div>
<div>Any help to understand and resolve the problem would be
greatly helpful to me.</div>
<div><br>
</div>
<div>Good day!</div>
<div><br>
</div>
<div>Best,</div>
<div>Tamil Vendhan Kanagarasu</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
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</blockquote>
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