- Originated from the discussion https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62316#note_596456387 The proposal is to remove Node Selector in Cloud Native charts for Reference Architecture to [remove complexity](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62316#note_597259791). Initial [test results with 50k environment](https://gitlab.com/gitlab-org/quality/reference-architectures/-/issues/24#note_604430039) showed that 50k Hybrid with node selector is slightly more performant than without, but the results are comparable: <details> <summary>GPT results comparison</summary> NAME | TARGET |no node selector| with node selector ---------------------------------------------------------|---------|----------------|------------------------------ api_v4_groups | 500ms | 152.33ms (-) | 137.97ms (**{+-2.87%+}**) api_v4_groups_group | 7500ms | 2069.28ms (-) | 1904.24ms (**{+-33.01%+}**) api_v4_groups_group_subgroups | 500ms | 220.65ms (-) | 160.58ms (**{+-12.01%+}**) api_v4_groups_issues | 3500ms | 3145.41ms (-) | 3223.31ms (_{-+15.58%-}_) api_v4_groups_merge_requests | 3500ms | 3003.68ms (-) | 3167.19ms (_{-+32.7%-}_) api_v4_groups_projects | 3500ms | 2070.42ms (-) | 2069.22ms (**{+-0.24%+}**) api_v4_projects | 7000ms | 4506.66ms (-) | 4154.46ms (**{+-70.44%+}**) api_v4_projects_deploy_keys | 500ms | 99.58ms (-) | 86.54ms (**{+-2.61%+}**) api_v4_projects_issues | 500ms | 722.40ms (-) | 481.37ms (**{+-48.21%+}**) api_v4_projects_issues_issue | 1500ms | 704.19ms (-) | 578.46ms (**{+-25.15%+}**) api_v4_projects_issues_search | 12000ms | 7855.40ms (-) | 7870.82ms (_{-+3.08%-}_) api_v4_projects_languages | 500ms | 85.98ms (-) | 81.56ms (**{+-0.88%+}**) api_v4_projects_merge_requests | 1000ms | 507.74ms (-) | 385.57ms (**{+-24.43%+}**) api_v4_projects_merge_requests_merge_request | 2000ms | 4997.89ms (-) | 4192.57ms (**{+-161.06%+}**) api_v4_projects_merge_requests_merge_request_changes | 3500ms | 6939.63ms (-) | 5860.28ms (**{+-215.87%+}**) api_v4_projects_merge_requests_merge_request_commits | 500ms | 120.84ms (-) | 117.24ms (**{+-0.72%+}**) api_v4_projects_merge_requests_merge_request_discussions | 500ms | 294.55ms (-) | 284.56ms (**{+-2.0%+}**) api_v4_projects_project | 500ms | 179.62ms (-) | 176.31ms (**{+-0.66%+}**) api_v4_projects_project_pipelines | 500ms | 103.98ms (-) | 103.65ms (**{+-0.07%+}**) api_v4_projects_project_pipelines_pipeline | 500ms | 121.16ms (-) | 118.75ms (**{+-0.48%+}**) api_v4_projects_project_services | 500ms | 86.68ms (-) | 84.08ms (**{+-0.52%+}**) api_v4_projects_releases | 500ms | 136.69ms (-) | 135.88ms (**{+-0.16%+}**) api_v4_projects_repository_branches | 500ms | 86.13ms (-) | 82.91ms (**{+-0.64%+}**) api_v4_projects_repository_branches_branch | 500ms | 130.51ms (-) | 116.59ms (**{+-2.78%+}**) api_v4_projects_repository_branches_search | 6000ms | 85.44ms (-) | 83.06ms (**{+-0.48%+}**) api_v4_projects_repository_commits | 500ms | 111.87ms (-) | 111.10ms (**{+-0.15%+}**) api_v4_projects_repository_commits_commit | 500ms | 166.64ms (-) | 163.18ms (**{+-0.69%+}**) api_v4_projects_repository_commits_commit_diff | 500ms | 175.60ms (-) | 169.47ms (**{+-1.23%+}**) api_v4_projects_repository_compare | 8000ms | 6443.07ms (-) | 5818.58ms (**{+-124.9%+}**) api_v4_projects_repository_files_file | 500ms | 183.24ms (-) | 170.69ms (**{+-2.51%+}**) api_v4_projects_repository_files_file_blame | 35000ms | 13481.83ms (-) | 11482.64ms (**{+-399.84%+}**) api_v4_projects_repository_files_file_raw | 500ms | 134.71ms (-) | 126.26ms (**{+-1.69%+}**) api_v4_projects_repository_tags | 10000ms | 7715.89ms (-) | 5982.40ms (**{+-346.7%+}**) api_v4_projects_repository_tree | 500ms | 138.00ms (-) | 129.74ms (**{+-1.65%+}**) api_v4_user | 500ms | 77.94ms (-) | 73.99ms (**{+-0.79%+}**) api_v4_users | 500ms | 88.11ms (-) | 83.52ms (**{+-0.92%+}**) git_ls_remote | 500ms | 93.54ms (-) | 89.87ms (**{+-0.73%+}**) git_pull | 500ms | 115.95ms (-) | 112.47ms (**{+-0.7%+}**) git_push | 1000ms | 464.26ms (-) | 462.10ms (**{+-0.43%+}**) scenario_api_list_group_variables | 500ms | 124.00ms (-) | 119.17ms (**{+-0.97%+}**) scenario_api_list_project_variables | 500ms | 139.24ms (-) | 133.30ms (**{+-1.19%+}**) scenario_api_new_branches | 1500ms | 359.86ms (-) | 344.37ms (**{+-3.1%+}**) scenario_api_new_commits | 700ms | 457.17ms (-) | 448.84ms (**{+-1.67%+}**) scenario_api_new_group_variables | 500ms | 102.88ms (-) | 95.45ms (**{+-1.49%+}**) scenario_api_new_issues | 2500ms | 256.86ms (-) | 247.65ms (**{+-1.84%+}**) scenario_api_new_project_variables | 500ms | 122.90ms (-) | 107.78ms (**{+-3.02%+}**) web_group | 500ms | 217.90ms (-) | 202.68ms (**{+-3.04%+}**) web_group_issues | 500ms | 374.95ms (-) | 361.78ms (**{+-2.63%+}**) web_group_merge_requests | 500ms | 345.91ms (-) | 329.42ms (**{+-3.3%+}**) web_project | 500ms | 352.79ms (-) | 329.43ms (**{+-4.67%+}**) web_project_branches | 1000ms | 844.15ms (-) | 742.62ms (**{+-20.31%+}**) web_project_branches_search | 1300ms | 948.19ms (-) | 853.02ms (**{+-19.03%+}**) web_project_commit | 10000ms | 2253.68ms (-) | 2204.30ms (**{+-9.88%+}**) web_project_commits | 750ms | 563.48ms (-) | 554.33ms (**{+-1.83%+}**) web_project_file_blame | 7000ms | 3985.56ms (-) | 3895.73ms (**{+-17.97%+}**) web_project_file_rendered | 3000ms | 790.03ms (-) | 760.68ms (**{+-5.87%+}**) web_project_file_source | 1700ms | 1058.36ms (-) | 1079.07ms (_{-+4.14%-}_) web_project_files | 800ms | 263.38ms (-) | 250.88ms (**{+-2.5%+}**) web_project_issue | 2000ms | 943.34ms (-) | 924.42ms (**{+-3.78%+}**) web_project_issues | 500ms | 381.27ms (-) | 369.04ms (**{+-2.45%+}**) web_project_issues_search | 500ms | 374.80ms (-) | 361.25ms (**{+-2.71%+}**) web_project_merge_request | 7500ms | 4921.24ms (-) | 4865.32ms (**{+-11.18%+}**) web_project_merge_request_changes | 1500ms | 807.50ms (-) | 797.55ms (**{+-1.99%+}**) web_project_merge_request_commits | 1750ms | 1432.89ms (-) | 1213.27ms (**{+-43.92%+}**) web_project_merge_requests | 500ms | 379.00ms (-) | 374.56ms (**{+-0.89%+}**) web_project_pipelines | 1000ms | 537.77ms (-) | 536.72ms (**{+-0.21%+}**) web_project_pipelines_pipeline | 2500ms | 1386.47ms (-) | 1387.44ms (_{-+0.19%-}_) web_project_repository_compare | 7500ms | 5836.24ms (-) | 5927.46ms (_{-+18.24%-}_) web_project_tags | 1500ms | 853.22ms (-) | 842.33ms (**{+-2.18%+}**) web_search_global | 2000ms | 138.71ms (-) | 129.67ms (**{+-1.81%+}**) web_search_groups | 3000ms | 119.57ms (-) | 112.91ms (**{+-1.33%+}**) web_search_projects | 3000ms | 147.09ms (-) | 142.56ms (**{+-0.91%+}**) web_user | 4000ms | 338.53ms (-) | 339.55ms (_{-+0.2%-}_) </details> So it looks like from performance perspective this change should not be impactful, however there could have been other considerations for separating the workloads. The issue is to explore this area and consult with Distribution team on best practices.