Re: 01/01: nginx: berlin: Disable narinfo caching altogether.

[Mark H Weaver]

Hi Ludovic,

address@hidden (Ludovic Courtès) writes:

> civodul pushed a commit to branch master
> in repository maintenance.
>
> commit 8379ba4119e51151d93589a6ef57cb159d94e9f2
> Author: Ludovic Courtès <address@hidden>
> Date:   Thu Jun 21 11:41:06 2018 +0200
>
>     nginx: berlin: Disable narinfo caching altogether.
>     
>     This is a followup to ebbe4c7f402b6d9cf9c6c2ecf120f49697ab2c49.
>     
>     * hydra/nginx/berlin-locations.conf (.narinfo): Disable caching.
>     * hydra/nginx/berlin.conf: Remove 'proxy_cache_path' directive
>     for narinfos.

What's the rationale for this change?

Although 'guix publish' does its own caching, I would expect 'nginx' to
handle cache hits far more efficiently than guix publish.  Therefore, I
expect this change to result in higher CPU usage for a given amount of
traffic.  I also expect that cache hits on narinfos are an important
common case for our substitute servers.

Does this change bring advantages that outweigh the loss of efficiency?

       Mark