{"id":28539,"date":"2025-12-25T17:19:09","date_gmt":"2025-12-25T08:19:09","guid":{"rendered":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=28539"},"modified":"2025-12-25T17:19:09","modified_gmt":"2025-12-25T08:19:09","slug":"m4-mac-mini%e3%81%ae%e3%83%97%e3%83%81%e3%83%95%e3%83%aa%e3%83%bc%e3%82%ba%e3%82%92%e8%bf%bd%e3%81%86-1","status":"publish","type":"post","link":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=28539","title":{"rendered":"M4 Mac mini\u306e\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u3092\u8ffd\u3046 (1)"},"content":{"rendered":"\n

M4 Mac miniを購入後約3か月でプチフリーズ<\/a>が頻発して，高速なパソコンを買ったはずなのに使いにくい状態になりました．Appleのサポートに相談したりAIに聞いたり情報検索したりしながら自分でいろいろ試したところ，<\/p>\n\n\n\n

    \n
  1. どういう条件でプチフリーズが起こるか<\/li>\n\n\n\n
  2. プチフリーズが起きた時の他の症状<\/li>\n\n\n\n
  3. 回避策<\/li>\n<\/ol>\n\n\n\n

    について解りました<\/a>．<\/p>\n\n\n\n

    使用環境は，M4 Mac mini RAM 24GB SSD 1TB，macOS 15.7.3 (Sequoia)です．<\/p>\n\n\n\n

    1はPagesで長時間大きめ（約500MB）の文書を開いていると，編集操作をしていなくても，Pagesおよびcorespotlightd，mds_stores，tccdなどがCPUを占有し1<\/a><\/sup>ただし，同時にそれらのプロセス全てがCPUを占有しているわけではない．<\/span>，~\/Library\/Metadata\/CoreSpotlight\/<\/code>内のファイルのサイズが50GBを超え非常識に大きくなったときに起きます2<\/a><\/sup>ただし，50GBを超えたら必ず起こるわけでもなく，必要条件です．<\/span>3<\/a><\/sup>ネット検索で得た情報では，SpotlightがPagesのエントリーを延々と書き出し続けているらしいそうです．<\/span>．<\/p>\n\n\n\n

    ただし，同じ文書をPagesで開きっぱなしにしてもMacBook Air M4では同じことは起きず，~\/Library\/Metadata\/CoreSpotlight\/<\/code>のサイズは300MB前後という常識的なものです．<\/p>\n\n\n\n

    ネット検索でもPagesとCoreSpotlightとプチフリーズの関係を指摘しているものがいくつか見つかり，PagesとCoreSpotlightが主犯であることはほぼ確実ですが，MacBook M4では起こっていないわけですから，他にも必要条件があるようです．<\/p>\n\n\n\n

    2については，プチフリーズ<\/a>ということで，最初はSSDのハード的な故障を疑ってBlackmagic Disk Speed Test<\/a>で測定したので解ったのですが，正常時には読み書きとも3000MB\/s前後のスピードが出ます4<\/a><\/sup>Stress=5GB.<\/span>が，プチフリーズが起き出すと書き込み速度が2000MB\/s以下，ひどいときは1000MB\/s以下にまで低下します5<\/a><\/sup>読み出しは3000MB\/sを少し下回る程度です．<\/span>．<\/p>\n\n\n\n

    したがって，プチフリーズか起き出すと，プチフリーズの継続時間を確認するとともに，Disk Speedを測定して客観データとしています．<\/p>\n\n\n\n

    3の回避策は，~\/Library\/Metadata\/CoreSpotlight\/<\/code>の中のファイル・フォルダーを削除して，Macを再起動すればよいです．また時間がたつと~\/Library\/Metadata\/CoreSpotlight\/<\/code>のサイズが増大して，プチフリーズが起きますが，数日は問題なく動きます．<\/p>\n\n\n\n

    Glossary<\/h3>\n\n\n\n

    プチフリーズ<\/h4>\n\n\n\n

    パソコンを操作しているとき，突然キーボードやマウスの操作に反応しなくなり6<\/a><\/sup>macOSの場合虹色の円板が回転する場合もあれば何も出ないこともある．<\/span>数秒から数十秒その状態が続いた後回復する．プチフリーズ中にタイピングした文字が回復時に表示されることが多い．<\/p>\n\n\n\n

    今回筆者のMac miniで確認できたプチフリーズの継続時間は3〜16秒．<\/p>\n\n\n\n

    初期のSSDでは書き込み速度が著しく遅く，プチフリーズを引き起こした．ちなみに，英語では “micro freeze” である．<\/p>\n\n\n\n

    Blackmagic Disk Speed Test<\/strong><\/h4>\n\n\n\n

    Blackmagic Design社<\/a>のディスクの速度計測アプリ<\/a>．<\/p>\n","protected":false},"excerpt":{"rendered":"

    M4 Mac mini\u3092\u8cfc\u5165\u5f8c\u7d043\u304b\u6708\u3067\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u304c\u983b\u767a\u3057\u3066\uff0c\u9ad8\u901f\u306a\u30d1\u30bd\u30b3\u30f3\u3092\u8cb7\u3063\u305f\u306f\u305a\u306a\u306e\u306b\u4f7f\u3044\u306b\u304f\u3044\u72b6\u614b\u306b\u306a\u308a\u307e\u3057\u305f\uff0eApple\u306e\u30b5\u30dd\u30fc\u30c8\u306b\u76f8\u8ac7\u3057\u305f\u308aAI\u306b\u805e\u3044\u305f\u308a\u60c5\u5831\u691c\u7d22\u3057\u305f\u308a\u3057\u306a\u304c\u3089\u81ea\u5206\u3067\u3044\u308d\u3044\u308d\u8a66\u3057\u305f\u3068\u3053\u308d\uff0c \u306b\u3064\u3044\u3066\u89e3\u308a\u307e\u3057\u305f\uff0e \u4f7f\u7528\u74b0\u5883\u306f\uff0cM4 Mac mini RAM 24GB SSD 1TB\uff0cmacOS 15.7.3 (Sequoia)\u3067\u3059\uff0e 1\u306fPages\u3067\u9577\u6642\u9593\u5927\u304d\u3081\uff08\u7d04500MB\uff09\u306e\u6587\u66f8\u3092\u958b\u3044\u3066\u3044\u308b\u3068\uff0c\u7de8\u96c6\u64cd\u4f5c\u3092\u3057\u3066\u3044\u306a\u304f\u3066\u3082\uff0cPages\u304a\u3088\u3073corespotlightd\uff0cmds_stores\uff0ctccd\u306a\u3069\u304cCPU\u3092\u5360\u6709\u3057\uff0c~\/Library\/Metadata\/CoreSpotlight\/\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30a4\u30ba\u304c50GB\u3092\u8d85\u3048\u975e\u5e38\u8b58\u306b\u5927\u304d\u304f\u306a\u3063\u305f\u3068\u304d\u306b\u8d77\u304d\u307e\u3059\uff0e \u305f\u3060\u3057\uff0c\u540c\u3058\u6587\u66f8\u3092Pages\u3067\u958b\u304d\u3063\u3071\u306a\u3057\u306b\u3057\u3066\u3082MacBook Air M4\u3067\u306f\u540c\u3058\u3053\u3068\u306f\u8d77\u304d\u305a\uff0c~\/Library\/Metadata\/CoreSpotlight\/\u306e\u30b5\u30a4\u30ba\u306f300MB\u524d\u5f8c\u3068\u3044\u3046\u5e38\u8b58\u7684\u306a\u3082\u306e\u3067\u3059\uff0e \u30cd\u30c3\u30c8\u691c\u7d22\u3067\u3082Pages\u3068CoreSpotlight\u3068\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u306e\u95a2\u4fc2\u3092\u6307\u6458\u3057\u3066\u3044\u308b\u3082\u306e\u304c\u3044\u304f\u3064\u304b\u898b\u3064\u304b\u308a\uff0cPages\u3068CoreSpotlight\u304c\u4e3b\u72af\u3067\u3042\u308b\u3053\u3068\u306f\u307b\u307c\u78ba\u5b9f\u3067\u3059\u304c\uff0cMacBook M4\u3067\u306f\u8d77\u3053\u3063\u3066\u3044\u306a\u3044\u308f\u3051\u3067\u3059\u304b\u3089\uff0c\u4ed6\u306b\u3082\u5fc5\u8981\u6761\u4ef6\u304c\u3042\u308b\u3088\u3046\u3067\u3059\uff0e 2\u306b\u3064\u3044\u3066\u306f\uff0c\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u3068\u3044\u3046\u3053\u3068\u3067\uff0c\u6700\u521d\u306fSSD\u306e\u30cf\u30fc\u30c9\u7684\u306a\u6545\u969c\u3092\u7591\u3063\u3066Blackmagic Disk Speed Test\u3067\u6e2c\u5b9a\u3057\u305f\u306e\u3067\u89e3\u3063\u305f\u306e\u3067\u3059\u304c\uff0c\u6b63\u5e38\u6642\u306b\u306f\u8aad\u307f\u66f8\u304d\u3068\u30823000MB\/s\u524d\u5f8c\u306e\u30b9\u30d4\u30fc\u30c9\u304c\u51fa\u307e\u3059\u304c\uff0c\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u304c\u8d77\u304d\u51fa\u3059\u3068\u66f8\u304d\u8fbc\u307f\u901f\u5ea6\u304c2000MB\/s\u4ee5\u4e0b\uff0c\u3072\u3069\u3044\u3068\u304d\u306f1000MB\/s\u4ee5\u4e0b\u306b\u307e\u3067\u4f4e\u4e0b\u3057\u307e\u3059\uff0e \u3057\u305f\u304c\u3063\u3066\uff0c\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u304b\u8d77\u304d\u51fa\u3059\u3068\uff0c\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u306e\u7d99\u7d9a\u6642\u9593\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3068\u3082\u306b\uff0cDisk Speed\u3092\u6e2c\u5b9a\u3057\u3066\u5ba2\u89b3\u30c7\u30fc\u30bf\u3068\u3057\u3066\u3044\u307e\u3059\uff0e 3\u306e\u56de\u907f\u7b56\u306f\uff0c~\/Library\/Metadata\/CoreSpotlight\/\u306e\u4e2d\u306e\u30d5\u30a1\u30a4\u30eb\u30fb\u30d5\u30a9\u30eb\u30c0\u30fc\u3092\u524a\u9664\u3057\u3066\uff0cMac\u3092\u518d\u8d77\u52d5\u3059\u308c\u3070\u3088\u3044\u3067\u3059\uff0e\u307e\u305f\u6642\u9593\u304c\u305f\u3064\u3068~\/Library\/Metadata\/CoreSpotlight\/\u306e\u30b5\u30a4\u30ba\u304c\u5897\u5927\u3057\u3066\uff0c\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u304c\u8d77\u304d\u307e\u3059\u304c\uff0c\u6570\u65e5\u306f\u554f\u984c\u306a\u304f\u52d5\u304d\u307e\u3059\uff0e Glossary \u30d7\u30c1\u30d5\u30ea\u30fc\u30ba \u30d1\u30bd\u30b3\u30f3\u3092\u64cd\u4f5c\u3057\u3066\u3044\u308b\u3068\u304d\uff0c\u7a81\u7136\u30ad\u30fc\u30dc\u30fc\u30c9\u3084\u30de\u30a6\u30b9\u306e\u64cd\u4f5c\u306b\u53cd\u5fdc\u3057\u306a\u304f\u306a\u308a\u6570\u79d2\u304b\u3089\u6570\u5341\u79d2\u305d\u306e\u72b6\u614b\u304c\u7d9a\u3044\u305f\u5f8c\u56de\u5fa9\u3059\u308b\uff0e\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u4e2d\u306b\u30bf\u30a4\u30d4\u30f3\u30b0\u3057\u305f\u6587\u5b57\u304c\u56de\u5fa9\u6642\u306b\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\uff0e \u4eca\u56de\u7b46\u8005\u306eMac mini\u3067\u78ba\u8a8d\u3067\u304d\u305f\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u306e\u7d99\u7d9a\u6642\u9593\u306f3\u301c16\u79d2\uff0e \u521d\u671f\u306eSSD\u3067\u306f\u66f8\u304d\u8fbc\u307f\u901f\u5ea6\u304c\u8457\u3057\u304f\u9045\u304f\uff0c\u30d7\u30c1\u30d5\u30ea\u30fc\u30ba\u3092\u5f15\u304d\u8d77\u3053\u3057\u305f\uff0e\u3061\u306a\u307f\u306b\uff0c\u82f1\u8a9e\u3067\u306f “micro freeze” \u3067\u3042\u308b\uff0e Blackmagic Disk Speed Test Blackmagic Design\u793e\u306e\u30c7\u30a3\u30b9\u30af\u306e\u901f\u5ea6\u8a08\u6e2c\u30a2\u30d7\u30ea\uff0e<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_daextam_enable_autolinks":"1","footnotes":""},"categories":[13,22],"tags":[],"class_list":["post-28539","post","type-post","status-publish","format-standard","hentry","category-mac","category-macintosh-computer"],"publishpress_future_action":{"enabled":false,"date":"2026-05-20 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