discourse/app/controllers/admin/diagnostics_controller.rb

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require_dependency 'memory_diagnostics'
class Admin::DiagnosticsController < Admin::AdminController
layout false
skip_before_filter :check_xhr
def dump_statement_cache
statements = Post.exec_sql("select * from pg_prepared_statements").to_a
text = ""
statements.each do |row|
text << "name: #{row["name"]} sql: #{row["statement"]}\n"
end
text << "\n\nCOUNT #{statements.count}"
render plain: text
end
def memory_stats
text = nil
if params.key?(:diff)
if !MemoryDiagnostics.snapshot_exists?
text = "No initial snapshot exists"
else
text = MemoryDiagnostics.compare
end
elsif params.key?(:snapshot)
MemoryDiagnostics.snapshot_current_process
text = "Writing snapshot to: #{MemoryDiagnostics.snapshot_filename}\n\nTo get a diff use ?diff=1"
else
text = MemoryDiagnostics.memory_report(class_report: params.key?(:full))
end
render plain: text
end
def dump_heap
begin
# ruby 2.1
GC.start(full_mark: true)
require 'objspace'
io = File.open("discourse-heap-#{SecureRandom.hex(3)}.json",'w')
ObjectSpace.dump_all(:output => io)
io.close
render plain: "HEAP DUMP:\n#{io.path}"
rescue
render plain: "HEAP DUMP:\nnot supported"
end
end
end