Support resetting of Prometheus metrics between test runs

Adding the :prometheus tag to an rspec test will clear out
memory-mapped files and reset the registry.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/39968

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index bf7489e8ae0..877b1c2a5f0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -297,7 +297,7 @@ group :metrics do
   gem 'influxdb', '~> 0.2', require: false
 
   # Prometheus
-  gem 'prometheus-client-mmap', '~> 0.9.1'
+  gem 'prometheus-client-mmap', '~> 0.9.2'
   gem 'raindrops', '~> 0.18'
 end