From 126a2428cd7fb5b2766da10373f72a370aa68ba5 Mon Sep 17 00:00:00 2001 From: Yorick Peterse Date: Thu, 5 Nov 2015 18:06:05 +0100 Subject: Updated profiling guides for Sherlock --- doc/development/profiling.md | 45 ++++++++------------------------------------ 1 file changed, 8 insertions(+), 37 deletions(-) (limited to 'doc/development') diff --git a/doc/development/profiling.md b/doc/development/profiling.md index 80c86ef921e..e244ad4e881 100644 --- a/doc/development/profiling.md +++ b/doc/development/profiling.md @@ -4,11 +4,15 @@ To make it easier to track down performance problems GitLab comes with a set of profiling tools, some of these are available by default while others need to be explicitly enabled. -## rack-mini-profiler +## Sherlock -This Gem is enabled by default in development only. It allows you to see the -timings of the various components that made up a web request (e.g. the SQL -queries executed and their execution timings). +Sherlock is a custom profiling tool built into GitLab. Sherlock is _only_ +available when running GitLab in development mode _and_ when setting the +environment variable `ENABLE_SHERLOCK` to a non empty value. For example: + + ENABLE_SHERLOCK=1 bundle exec rails s + +Recorded transactions can be found by navigating to `/sherlock/transactions`. ## Bullet @@ -21,36 +25,3 @@ starting GitLab. For example: Bullet will log query problems to both the Rails log as well as the Chrome console. - -## ActiveRecord Query Trace - -This Gem adds backtraces for every ActiveRecord query in the Rails console. This -can be useful to track down where a query was executed. Because this Gem adds -quite a bit of noise (5-10 extra lines per ActiveRecord query) it's disabled by -default. To use this Gem you'll need to set `ENABLE_QUERY_TRACE` to a non empty -file before starting GitLab. For example: - - ENABLE_QUERY_TRACE=true bundle exec rails s - -## rack-lineprof - -This is a Gem that can trace the execution time of code on a per line basis. -Because this Gem can add quite a bit of overhead it's disabled by default. To -enable it, set the environment variable `ENABLE_LINEPROF` to a non-empty value. -For example: - - ENABLE_LINEPROF=true bundle exec rails s - -Once enabled you'll need to add a query string parameter to a request to -actually profile code execution. The name of the parameter is `lineprof` and -should be set to a regular expression (minus the starting/ending slash) used to -select what files to profile. To profile all files containing "foo" somewhere in -the path you'd use the following parameter: - - ?lineprof=foo - -Or when filtering for files containing "foo" and "bar" in their path: - - ?lineprof=foo|bar - -Once set the profiling output will be displayed in your terminal. -- cgit v1.2.3