[Bug 252416] www/gitlab-ce may need more workers configured in puma.rb

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252416

            Bug ID: 252416
           Summary: www/gitlab-ce may need more workers configured in
                    puma.rb
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: mfechner at FreeBSD.org
          Reporter: gwright at antiope.com
          Assignee: mfechner at FreeBSD.org
             Flags: maintainer-feedback?(mfechner at FreeBSD.org)

Hi,

When upgrading the gitlab-ce port to version 13.7.1, I noticed intermittent
failures of some pages.  For example, navigating to the Repository -> Graph
page would spin forever, never rendering the repository network graph.

After fumbling about, I noticed that after the switch from unicorn to puma I
had not updated my puma configuration to match my unicorn.rb. My GitLab
instance has several dozen projects, with sizes from tens of MB to about one
GB.  In the file
```config/puma.rb```, the number of workers was still at the default value of
3.  I bumped it up to 8 and the problem disappeared.  Evidently I was running
out of workers which would stall the rending of complex pages.

Here is the change I made:
```
root at gitlab:/usr/local/www/gitlab-ce # git diff config/puma.rb.sample
config/puma.rb
diff --git a/config/puma.rb.sample b/config/puma.rb
index 02bf6de..3a24376 100644
--- a/config/puma.rb.sample
+++ b/config/puma.rb
@@ -33,7 +33,7 @@ queue_requests false
 # accepted protocols.
 bind 'unix:///usr/local/www/gitlab-ce/tmp/sockets/gitlab.socket'

-workers 3
+workers 8

 require_relative
"/usr/local/www/gitlab-ce/lib/gitlab/cluster/lifecycle_events"
 require_relative
"/usr/local/www/gitlab-ce/lib/gitlab/cluster/puma_worker_killer_initializer"
root at gitlab:/usr/local/www/gitlab-ce #
```
This is not strictly a bug, but the documentation should note that the default
number of puma workers is perhaps only suitable for testing and needs to be
increased on a production server.

Don't know why I didn't hit this earlier (the change in default server from
unicorn to puma occurred around 13.5), but I since I am back at work I am
stressing my gitlab instance more.

Thanks.

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