Remove allocation tracking code from InfluxDB sampler for performance

On GitLab.com, InfluxSampler#sample_objects appears to take 1.2 s or so to
iterate through 1059 objects. This had led to delays of a couple hundred
milliseconds in processing in the main thread. Remove this code since it's not
really being used.

Closes gitlab-com/infrastructure#3250

1 files changed, 0 insertions, 24 deletions

diff --git a/lib/gitlab/metrics/samplers/influx_sampler.rb b/lib/gitlab/metrics/samplers/influx_sampler.rb
index f4f9b5ca792..5a0f7f28fc8 100644
--- a/lib/gitlab/metrics/samplers/influx_sampler.rb
+++ b/lib/gitlab/metrics/samplers/influx_sampler.rb
@@ -27,7 +27,6 @@ module Gitlab
         def sample
           sample_memory_usage
           sample_file_descriptors
-          sample_objects
           sample_gc
 
           flush
@@ -48,29 +47,6 @@ module Gitlab
           add_metric('file_descriptors', value: System.file_descriptor_count)
         end
 
-        if Metrics.mri?
-          def sample_objects
-            sample = Allocations.to_hash
-            counts = sample.each_with_object({}) do |(klass, count), hash|
-              name = klass.name
-
-              next unless name
-
-              hash[name] = count
-            end
-
-            # Symbols aren't allocated so we'll need to add those manually.
-            counts['Symbol'] = Symbol.all_symbols.length
-
-            counts.each do |name, count|
-              add_metric('object_counts', { count: count }, type: name)
-            end
-          end
-        else
-          def sample_objects
-          end
-        end
-
         def sample_gc
           time = GC::Profiler.total_time * 1000.0
           stats = GC.stat.merge(total_time: time)