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 text: text, content_type: Mime::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 text: text, content_type: Mime::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 text: "HEAP DUMP:\n#{io.path}", content_type: Mime::TEXT rescue render text: "HEAP DUMP:\nnot supported", content_type: Mime::TEXT end end end