Nginx response times got increased for unknown reasons

[Jore]

Is an IPv4 or IPv6 change a factor?


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