RPi3, RPi3+ともVLCが1日以上安定してRTSPを再生することが出来ません<\/a>．それで，小メモリーにZRAMは不適といったんは結論づけました．<\/p>\n\n\n\nしかし，RPiでVLCを使ってRTSPを再生するにあたり，SWAPが500MB以上必要なケースはないようです．少なくともdphys-swapfileでは初期値が512MBで，動作状況を見てもSWAPの使用が300MBを超えることはないです．<\/p>\n\n\n\n
ということで，ZRAMについてもSWAPの容量は400〜500MBで良いのではないかと思い，現在主記憶の50%という設定で動かしています．今のところRPi3もRPi3+もまる1日以上安定してVLCがRTSPを再生し続けています．<\/p>\n\n\n\n
ところで，RPi Zero 2 WHですが，こちらは主記憶が500MBで，VLCでRTSPを再生するとSWAPの領域は200MBを越えますので，おそらくZRAMの領域を主記憶の50%としたところで安定性は戻らないと思います．そもそもdphys-swapfileでも安定しませんし．<\/p>\n\n\n\n
ということで，RPi3およびRPi3+についてはしばらく50%でZRAMの試用を続けます．RPi Zero 2 WHについては門柱灯を日の出，日の入りの時刻にOFF\/ONする門番の役目を与えることにします．<\/p>\n","protected":false},"excerpt":{"rendered":"
\u624b\u6301\u3061\u306eRaspberry Pi (RPi)\u306e\u3046\u3061\uff0cRPi 3 Model B (RPi3)\u3068\uff0cRPi 3 Model B+ (RPi3+)\u306f\u30e1\u30e2\u30ea\u30fc\u304c1GB\u3067\u3059\uff08\u5b9f\u969b\u306f\u3069\u3061\u3089\u3082900MB\u5f37\uff09\uff0e\u307e\u305fRPi Zero 2 WH\u306f500MB\u3067\u3059\uff0e \u30e1\u30e2\u30ea\u30fc\u304c\u5c0f\u3055\u3044RPi\u306f\uff0cZRAM\u306e\u30b5\u30a4\u30ba\u3092100%\u301c120%\u306b\u3057\u3066\u3044\u307e\u3057\u305f\uff0e\u3057\u304b\u3057\u3069\u3046\u3082\u3053\u308c\u304c\u8ca0\u62c5\u306e\u3088\u3046\u3067\uff0cRPi3, RPi3+\u3068\u3082VLC\u304c1\u65e5\u4ee5\u4e0a\u5b89\u5b9a\u3057\u3066RTSP\u3092\u518d\u751f\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u305b\u3093\uff0e\u305d\u308c\u3067\uff0c\u5c0f\u30e1\u30e2\u30ea\u30fc\u306bZRAM\u306f\u4e0d\u9069\u3068\u3044\u3063\u305f\u3093\u306f\u7d50\u8ad6\u3065\u3051\u307e\u3057\u305f\uff0e \u3057\u304b\u3057\uff0cRPi\u3067VLC\u3092\u4f7f\u3063\u3066RTSP\u3092\u518d\u751f\u3059\u308b\u306b\u3042\u305f\u308a\uff0cSWAP\u304c500MB\u4ee5\u4e0a\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u306f\u306a\u3044\u3088\u3046\u3067\u3059\uff0e\u5c11\u306a\u304f\u3068\u3082dphys-swapfile\u3067\u306f\u521d\u671f\u5024\u304c512MB\u3067\uff0c\u52d5\u4f5c\u72b6\u6cc1\u3092\u898b\u3066\u3082SWAP\u306e\u4f7f\u7528\u304c300MB\u3092\u8d85\u3048\u308b\u3053\u3068\u306f\u306a\u3044\u3067\u3059\uff0e \u3068\u3044\u3046\u3053\u3068\u3067\uff0cZRAM\u306b\u3064\u3044\u3066\u3082SWAP\u306e\u5bb9\u91cf\u306f400\u301c500MB\u3067\u826f\u3044\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u601d\u3044\uff0c\u73fe\u5728\u4e3b\u8a18\u61b6\u306e50%\u3068\u3044\u3046\u8a2d\u5b9a\u3067\u52d5\u304b\u3057\u3066\u3044\u307e\u3059\uff0e\u4eca\u306e\u3068\u3053\u308dRPi3\u3082RPi3+\u3082\u307e\u308b1\u65e5\u4ee5\u4e0a\u5b89\u5b9a\u3057\u3066VLC\u304cRTSP\u3092\u518d\u751f\u3057\u7d9a\u3051\u3066\u3044\u307e\u3059\uff0e \u3068\u3053\u308d\u3067\uff0cRPi Zero 2 WH\u3067\u3059\u304c\uff0c\u3053\u3061\u3089\u306f\u4e3b\u8a18\u61b6\u304c500MB\u3067\uff0cVLC\u3067RTSP\u3092\u518d\u751f\u3059\u308b\u3068SWAP\u306e\u9818\u57df\u306f200MB\u3092\u8d8a\u3048\u307e\u3059\u306e\u3067\uff0c\u304a\u305d\u3089\u304fZRAM\u306e\u9818\u57df\u3092\u4e3b\u8a18\u61b6\u306e50%\u3068\u3057\u305f\u3068\u3053\u308d\u3067\u5b89\u5b9a\u6027\u306f\u623b\u3089\u306a\u3044\u3068\u601d\u3044\u307e\u3059\uff0e\u305d\u3082\u305d\u3082dphys-swapfile\u3067\u3082\u5b89\u5b9a\u3057\u307e\u305b\u3093\u3057\uff0e \u3068\u3044\u3046\u3053\u3068\u3067\uff0cRPi3\u304a\u3088\u3073RPi3+\u306b\u3064\u3044\u3066\u306f\u3057\u3070\u3089\u304f50%\u3067ZRAM\u306e\u8a66\u7528\u3092\u7d9a\u3051\u307e\u3059\uff0eRPi Zero 2 WH\u306b\u3064\u3044\u3066\u306f\u9580\u67f1\u706f\u3092\u65e5\u306e\u51fa\uff0c\u65e5\u306e\u5165\u308a\u306e\u6642\u523b\u306bOFF\/ON\u3059\u308b\u9580\u756a\u306e\u5f79\u76ee\u3092\u4e0e\u3048\u308b\u3053\u3068\u306b\u3057\u307e\u3059\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":[8,27,28],"tags":[],"class_list":["post-27134","post","type-post","status-publish","format-standard","hentry","category-linux","category-rasapberry-pi","category-security"],"publishpress_future_action":{"enabled":false,"date":"2026-06-18 02:48:05","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=\/wp\/v2\/posts\/27134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27134"}],"version-history":[{"count":0,"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=\/wp\/v2\/posts\/27134\/revisions"}],"wp:attachment":[{"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}