Merge branch 'remove-peek-gc' into 'master'

Remove GC metrics from performance bar

Closes gitlab-org/quality/nightly#122

See merge request gitlab-org/gitlab-ce!31550

Gemfile

@@ -296,7 +296,6 @@ gem 'batch-loader', '~> 1.4.0'
 # Perf bar
 gem 'peek', '~> 1.0.1'
-gem 'peek-gc', '~> 0.0.2'
 # Memory benchmarks
 gem 'derailed_benchmarks', require: false

Gemfile.lock

@@ -641,8 +641,6 @@ GEM
       concurrent-ruby (>= 0.9.0)
       concurrent-ruby-ext (>= 0.9.0)
       railties (>= 4.0.0)
-    peek-gc (0.0.2)
-      peek
     pg (1.1.4)
     po_to_json (1.0.1)
       json (>= 1.6.0)
@@ -1173,7 +1171,6 @@ DEPENDENCIES
   omniauth_openid_connect (~> 0.3.1)
   org-ruby (~> 0.9.12)
   peek (~> 1.0.1)
-  peek-gc (~> 0.0.2)
   pg (~> 1.1)
   premailer-rails (~> 1.9.7)
   prometheus-client-mmap (~> 0.9.8)

app/assets/javascripts/performance_bar/components/performance_bar_app.vue

@@ -112,12 +112,6 @@ export default {
         :header="metric.header"
         :keys="metric.keys"
       />
-      <div id="peek-view-gc" class="view">
-        <span v-if="currentRequest.details" class="bold">
-          <span title="Invoke Time">{{ currentRequest.details.gc.gc_time }}</span
-          >ms / <span title="Invoke Count">{{ currentRequest.details.gc.invokes }}</span> gc
-        </span>
-      </div>
       <div
         v-if="currentRequest.details && currentRequest.details.tracing"
         id="peek-view-trace"

changelogs/unreleased/remove-peek-gc.yml

+---
+title: Remove GC metrics from performance bar
+merge_request:
+author:
+type: removed

config/initializers/peek.rb

@@ -10,9 +10,4 @@ Peek.into Peek::Views::Gitaly
 Peek.into Peek::Views::RedisDetailed
 Peek.into Peek::Views::Rugged
-# `Peek::Views::GC` is currently disabled in production, as it runs with every request
-# even if PerformanceBar is inactive and clears `GC::Profiler` reports we need for metrics.
-# Check https://gitlab.com/gitlab-org/gitlab-ce/issues/65455
-Peek.into Peek::Views::GC if Rails.env.development?
-
 Peek.into Peek::Views::Tracing if Labkit::Tracing.tracing_url_enabled?

doc/administration/monitoring/performance/performance_bar.md

@@ -16,7 +16,6 @@ It allows you to see (from left to right):
   ![Rugged profiling using the Performance Bar](img/performance_bar_rugged_calls.png)
 - time taken and number of Redis calls, click through for details of these calls
   ![Redis profiling using the Performance Bar](img/performance_bar_redis_calls.png)
-- time taken and number of Ruby GC calls
 On the far right is a request selector that allows you to view the same metrics
 (excluding the page timing and line profiler) for any requests made while the