Re: Expert needed to Tune Nginx For Best Performance

Mon, 18 Nov 2019 20:35:53 -0800

There are websites that check web server performance. I haven't bothered with them in years, but the suggestions on browser caching were useful. Google will find half a dozen. 

This site sticks in my brain because it caught a bug in my setup. They have a free demo. 
https://www.tinfoilsecurity.com/
Not really performance, but you might as well fix the holes. 


Sent: November 18, 2019 6:59 PM
Subject: Re: Expert needed to Tune Nginx For Best Performance

Hi J,

There’s a guy on Upwork (seems to me MIA) who advertises a service that covers my requirements:


Web Performance Expert / Professional Linux Systems Engineer

As a systems engineer and PHP developer, I have developed a lot of skills in the area of performance optimization. Web performance is extremely important for your visitors as well as for how your rank in the major search engines. 

My approach to helping clients consists of the following: 

- Establishing a baseline performance of a specific problematic page, that can be easily reproduces - Analyse the HTML/CSS and _javascript_ loading to detect any bottlenecks on the page 
- Optimise loading of external assets by following best modern practices 
- Analyse the Linux server configuration, this means CPU, Memory and disk performance, Apache / Nginx configuration, PHP configuration, etc. 
- Profile the web application to detect the parts of the code that take up the most CPU time (like for example slow SQL queries), use the most memory, are waiting for disk I/O the longest, or transferring the most data over the network 
- Finally, I write a quick report to the client with my findings, and upon agreement, I start optimising the code, system configuration, etc. in order to bring down the time it takes for the page to load. 
- Caching can be implemented (like in memcached, redis, ...) and PHP OpCache can be configured and deployed 
- SSL settings can be fine-tuned to get a good rating on SSL Labs, keeping in mind the visitors and their browsers. 


On 16 Nov 2019, at 17:26, j94305 <[email protected]> wrote:

Optimizing for production is not simply an optimization of one component,
e.g., NGINX.

This is also about your security model, the application architecture and
scaling abilities.

If you simply have static files to be served, place them into a memory-based
file system and you'll serve them blindingly fast - in theory. Actual
performance will depend on the locations of your clients, with their
latencies and bandwidths, so the approach may be not to accelerate one NGINX
server location, but rather have a geographic distribution to serving
content at the edge.

If you need to serve to lower-bandwidth clients, gzip compression may be
essential for latencies. If you have clients with broadband capabilities,
you may want to save the extra CPU cycles for other tasks.

If your security model requires complex signature verification on every
request, you may need significantly more CPU power in there, compared to
when you simply handle easily-verifiable cookies (which were assigned
through a more compute-intensive calculation and verification scheme - but
only once per session). OIDC-based schemes come to my mind.

If you have different types of loads, it is sensible to separate them.
Static files will be served by one cluster of servers, dynamic content will
be served by another. Having auto-scaling groups on the application side ,
you can scale well, assuming state-less micro-services there.

If there is a broadly varying spectrum of load situations, you may want to
consider clusters of NGINX, possibly with auto-scaling, to handle loads more
effectively. Optimizing single NGINX instances may not what will really
boost performance enough.

So, my point is: optimizing any application environment for production use
is not just a matter of nifty directives to speed up NGINX. It's a question
of optimizing the architecture AND its components, including the application
services. I've seen massive speed-ups just by changing the application into
a set of state-less micro-services - focus on "state-less".

While you will find people who help you with NGINX optimization in a given
scenario, this may not be what you really need to optimize your entire
application, including NGINX.

Cheers,
--j.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,286223,286224#msg-286224

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