Friday, April 11, 2014

[メモ] Starlet 0.22のリリースに伴いThundering Herd問題を再訪した件


で、それに伴いprefork型TCPサーバのThundering Herd問題を再訪したので、その備忘録。なお、Thundering Herd問題については、prefork サーバーと thundering herd 問題 - naoyaのはてなダイアリーや、Starman と Starlet のベンチマークと Accept Serialization - Hateburo: kazeburo hatenablogあたりを参照のこと。


こいつを書いてあるコメントのとおり実行してみることで、2種類のケースでThundering Herd問題が存在するか調べることができる。

  • accept(2)の呼出によるThundering Herd問題だが、多くの環境で過去の問題になったと考えてよい
  • select(2)で接続を待ち受け、次にaccept(2)を呼ぶようなケースでは、依然としてThundering Herd問題が存在する(当然と言えば当然だが)
とか言ってみたけど、、linux 2.6.32とOS X 10.8.5でしかテストしてないので、補足あれば教えてください m(__)m




  1. If in the advancing years it is added difficult to get a replica, this could be a acceptable affair for the breitling replica name brands. On the added hand, it could drive replica houses to accumulate accepting added and added authentic and accordingly added difficult to alarm out. In either case, the Watch Report for 2007 will become abnormally important for rolex replica consumers who accept something at pale in the development of the industry, for bigger or for worse. It has again taken six ancestors for this watch to evolve, and it is still not absolutely like the absolute thing! Aesthetically, it looks appealing acceptable you accept to admit, but if it was accustomed a absolute examination, it would not pass, no way. Over the year and bisected that it is taken for rolex replica uk this watch to appear this far, it is still got a continued means to go. In fact, I agnosticism that it will anytime be perfect. For one applied acumen if it was 100% accurate, it ability in fact accessible the floodgates for accusation from Panerai. The baby flaws accumulate it in some means as a distinct-enough altered watch they the replica companies could just play dumb, in a acknowledged cloister of law that is. Unfortunately, you accept to accord with some slight discrepancies amid replicas and the absolute thing, that is just how the replica rolex watches change is fit to plan for this industry.


  2. Wonderful blog! I found it while searching on Yahoo News. Do you have any suggestions on how to get listed in Yahoo News? I’ve been trying for a while but I never seem to get there! Many thanks.
    2048 online | tanki online 3