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| author | GitLab Bot <gitlab-bot@gitlab.com> | 2021-01-13 12:10:27 +0000 |
|---|---|---|
| committer | GitLab Bot <gitlab-bot@gitlab.com> | 2021-01-13 12:10:27 +0000 |
| commit | 39c1496527de559d5d3a5c3b53d11575f435a4dc (patch) | |
| tree | 51ed818b49752bb27d8bc7a13e9efcb3e5192c1f /doc/development/profiling.md | |
| parent | ab9c1dbb2dc0e591a6ce4466e15766d99f4abf4b (diff) | |
| download | gitlab-ce-39c1496527de559d5d3a5c3b53d11575f435a4dc.tar.gz | |
Add latest changes from gitlab-org/gitlab@master
Diffstat (limited to 'doc/development/profiling.md')
| -rw-r--r-- | doc/development/profiling.md | 56 |
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diff --git a/doc/development/profiling.md b/doc/development/profiling.md index f6c7f493b21..ce9c1191648 100644 --- a/doc/development/profiling.md +++ b/doc/development/profiling.md @@ -128,6 +128,62 @@ console. As a follow up to finding `N+1` queries with Bullet, consider writing a [QueryRecoder test](query_recorder.md) to prevent a regression. +## System stats + +During or after profiling, you may want to get detailed information about the Ruby virtual machine process, +such as memory consumption, time spent on CPU, or garbage collector statistics. These are easy to produce individually +through various tools, but for convenience, a summary endpoint has been added that exports this data as a JSON payload: + +```shell +curl localhost:3000/-/metrics/system | jq +``` + +Example output: + +```json +{ + "version": "ruby 2.7.2p137 (2020-10-01 revision a8323b79eb) [x86_64-linux-gnu]", + "gc_stat": { + "count": 118, + "heap_allocated_pages": 11503, + "heap_sorted_length": 11503, + "heap_allocatable_pages": 0, + "heap_available_slots": 4688580, + "heap_live_slots": 3451712, + "heap_free_slots": 1236868, + "heap_final_slots": 0, + "heap_marked_slots": 3451450, + "heap_eden_pages": 11503, + "heap_tomb_pages": 0, + "total_allocated_pages": 11503, + "total_freed_pages": 0, + "total_allocated_objects": 32679478, + "total_freed_objects": 29227766, + "malloc_increase_bytes": 84760, + "malloc_increase_bytes_limit": 32883343, + "minor_gc_count": 88, + "major_gc_count": 30, + "compact_count": 0, + "remembered_wb_unprotected_objects": 114228, + "remembered_wb_unprotected_objects_limit": 228456, + "old_objects": 3185330, + "old_objects_limit": 6370660, + "oldmalloc_increase_bytes": 21838024, + "oldmalloc_increase_bytes_limit": 119181499 + }, + "memory_rss": 1326501888, + "memory_uss": 1048563712, + "memory_pss": 1139554304, + "time_cputime": 82.885264633, + "time_realtime": 1610459445.5579069, + "time_monotonic": 24001.23145713, + "worker_id": "puma_0" +} +``` + +NOTE: +This endpoint is only available for Rails web workers. Sidekiq workers can not be inspected this way. + ## Settings that impact performance ### Application settings |