intermittent 502 error in gitlab while accessing project page

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I could see intermittent 502 error while accessing the gitlab projects
The gitlab.rb settings is like below for unicorn `## Tweak unicorn settings. unicorn['worker_timeout'] = 300
unicorn['worker_processes'] = 2

unicorn['listen'] = '127.0.0.1'`

The unicorn worker process is still in default as 2 but i could see the unicorn process in server is more. PFB
git       2461 57974  1 11:21 ?        00:02:58 unicorn worker[51] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       2952 57974  2 12:00 ?        00:02:44 unicorn worker[17] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       3052 57974  6 14:10 ?        00:00:02 unicorn worker[53] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       3393 57974  1 09:22 ?        00:04:40 unicorn worker[19] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
root      4770  4753  0 Jan24 ?        00:00:00 runsv unicorn
root      4786  4770  0 Jan24 ?        00:00:00 svlogd -tt /var/log/gitlab/unicorn
git       5331 57974  1 11:43 ?        00:02:51 unicorn worker[13] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       5426 57974  2 11:21 ?        00:03:28 unicorn worker[40] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       5508 57974  1 11:43 ?        00:02:34 unicorn worker[46] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
root      7482 64262  0 14:11 pts/0    00:00:00 grep unicorn
git       7807 57974  1 12:09 ?        00:02:08 unicorn worker[28] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       8071 57974  1 12:44 ?        00:01:32 unicorn worker[41] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       8302 57974  2 11:33 ?        00:03:25 unicorn worker[3] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git       9082 57974  1 09:32 ?        00:05:04 unicorn worker[14] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git       9521 57974  1 09:42 ?        00:04:23 unicorn worker[7] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git       9563 57974  1 10:55 ?        00:03:15 unicorn worker[44] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      10025 57974  1 08:43 ?        00:05:43 unicorn worker[25] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      10293 57974  1 08:20 ?        00:05:45 unicorn worker[60] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      11996 57974  1 05:23 ?        00:07:01 unicorn worker[63] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      12658 57974  1 10:03 ?        00:04:51 unicorn worker[27] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      12799 57974  1 10:18 ?        00:03:46 unicorn worker[11] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      14594 57974  2 12:29 ?        00:02:02 unicorn worker[57] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      16520 57974  1 12:46 ?        00:01:30 unicorn worker[0] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      17654 57974  1 10:40 ?        00:03:55 unicorn worker[48] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      20043 57974  1 08:04 ?        00:06:25 unicorn worker[45] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      21460 57974  1 10:12 ?        00:03:58 unicorn worker[26] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      21537 57974  2 13:44 ?        00:00:33 unicorn worker[61] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      22456 57974  0 Jun09 ?        00:11:52 unicorn worker[10] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      23467 57974  1 11:15 ?        00:02:59 unicorn worker[8] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      23785 57974  1 12:11 ?        00:02:17 unicorn worker[62] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      24462 57974  1 12:11 ?        00:02:18 unicorn worker[55] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      27218 57974  1 13:45 ?        00:00:27 unicorn worker[39] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      27401 57974  1 05:31 ?        00:07:08 unicorn worker[59] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      30191 57974  2 12:57 ?        00:01:29 unicorn worker[36] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      30406 57974  2 14:04 ?        00:00:08 unicorn worker[1] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      30648 57974  1 13:07 ?        00:01:10 unicorn worker[6] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      31128 57974  2 14:04 ?        00:00:08 unicorn worker[31] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      33321 57974  1 13:46 ?        00:00:29 unicorn worker[23] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      38453 57974  1 11:57 ?        00:02:13 unicorn worker[54] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      39039 57974  2 12:33 ?        00:02:08 unicorn worker[2] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      40203 57974  0 Jun08 ?        00:19:21 unicorn worker[42] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      40334 57974  1 13:18 ?        00:00:48 unicorn worker[24] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      40438 57974  2 13:47 ?        00:00:30 unicorn worker[52] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      41214 57974  1 08:34 ?        00:05:52 unicorn worker[37] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      41818 57974  1 09:37 ?        00:04:54 unicorn worker[58] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      42092 57974  1 06:25 ?        00:07:55 unicorn worker[49] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      42930 57974  1 08:51 ?        00:05:57 unicorn worker[16] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      43680 57974  0 Jun07 ?        00:24:53 unicorn worker[34] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      43692 57974  2 14:06 ?        00:00:08 unicorn worker[33] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      43925 57974  1 09:47 ?        00:04:30 unicorn worker[9] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      44086 57974  1 10:24 ?        00:03:49 unicorn worker[5] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      46931 57974  1 13:10 ?        00:01:07 unicorn worker[35] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      49912 57974  1 06:29 ?        00:07:10 unicorn worker[64] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      50853 57974  1 10:44 ?        00:03:37 unicorn worker[20] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      51474 57974  1 12:51 ?        00:01:23 unicorn worker[47] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      51833 57974  1 10:51 ?        00:03:27 unicorn worker[29] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      53962 57974  2 12:35 ?        00:01:59 unicorn worker[12] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      54969 57974  1 10:08 ?        00:04:51 unicorn worker[18] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      57436 57974  2 12:16 ?        00:02:20 unicorn worker[21] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      57517 57974  1 09:30 ?        00:05:17 unicorn worker[4] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru 
git      57974     1  0 May09 ?        00:04:36 unicorn master -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru    
git      58657  4770  0 May09 ?        00:25:17 /bin/bash /opt/gitlab/embedded/bin/gitlab-unicorn-wrapper
git      58709 57974  1 10:16 ?        00:04:09 unicorn worker[22] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      59173 57974  1 11:20 ?        00:03:15 unicorn worker[30] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      59913 57974  1 09:50 ?        00:04:44 unicorn worker[38] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      62314 57974  1 11:20 ?        00:03:14 unicorn worker[43] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      64252 57974  1 12:08 ?        00:02:12 unicorn worker[15] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      64374 57974  1 13:41 ?        00:00:32 unicorn worker[32] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      64387 57974  1 12:08 ?        00:02:14 unicorn worker[50] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
git      64922 57974  1 05:17 ?        00:07:33 unicorn worker[56] -D -E production -c /var/opt/gitlab/gitlab-rails/etc/unicorn.rb /opt/gitlab/embedded/service/gitlab-rails/config.ru
what is the difference in unicorn worker default value and the number of process currently running?
Currently we have enough CPU as like below,
Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 56 On-line CPU(s) list: 0-55 Thread(s) per core: 2 Core(s) per socket: 14 Socket(s): 2 NUMA node(s): 2 Vendor ID: GenuineIntel CPU family: 6 Model: 63 Model name: Intel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz Stepping: 2 CPU MHz: 2600.000 BogoMIPS: 5193.72 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 35840K NUMA node0 CPU(s): 0-13,28-41 NUMA node1 CPU(s): 14-27,42-55
Edited Sep 06, 2025 by 🤖 GitLab Bot 🤖