{"id":4528,"date":"2026-06-14T19:31:10","date_gmt":"2026-06-14T19:31:10","guid":{"rendered":"https:\/\/cloudsave.app\/?p=4528"},"modified":"2026-06-15T14:27:03","modified_gmt":"2026-06-15T14:27:03","slug":"postgresql-wal%e3%82%a2%e3%83%bc%e3%82%ab%e3%82%a4%e3%83%93%e3%83%b3%e3%82%b0-%e3%82%88%e3%81%8f%e3%81%82%e3%82%8b%e8%90%bd%e3%81%a8%e3%81%97%e7%a9%b4%e3%81%a8%e3%83%87%e3%83%bc%e3%82%bf%e6%90%8d","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/ja\/knowledge-base\/postgresql-wal%e3%82%a2%e3%83%bc%e3%82%ab%e3%82%a4%e3%83%93%e3%83%b3%e3%82%b0-%e3%82%88%e3%81%8f%e3%81%82%e3%82%8b%e8%90%bd%e3%81%a8%e3%81%97%e7%a9%b4%e3%81%a8%e3%83%87%e3%83%bc%e3%82%bf%e6%90%8d\/","title":{"rendered":"PostgreSQL WAL\u30a2\u30fc\u30ab\u30a4\u30d3\u30f3\u30b0\uff1a\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u30c7\u30fc\u30bf\u640d\u5931\u306e\u30ea\u30b9\u30af"},"content":{"rendered":"<p>\u672c\u756a\u74b0\u5883\u3067PostgreSQL\u3092\u7ba1\u7406\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u8005\uff08DBA\uff09\u3084DevOps\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u3068\u3063\u3066\u3001\u76ee\u6a19\u5fa9\u65e7\u6642\u70b9\uff08RPO\uff09\u3092\u30bc\u30ed\u306b\u8fd1\u3065\u3051\u308b\u3053\u3068\u306f\u6700\u512a\u5148\u4e8b\u9805\u3067\u3059\u3002PostgreSQL\u306e\u707d\u5bb3\u5fa9\u65e7\u304a\u3088\u3073\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\uff08PITR\uff09\u6a5f\u80fd\u306e\u4e2d\u6838\u3092\u6210\u3059\u306e\u304c\u3001Write-Ahead Logging\uff08WAL\uff09\u3067\u3059\u3002WAL\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307e\u308c\u308b\u524d\u306b\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u8a18\u9332\u3059\u308b\u3053\u3068\u3067ACID\u6e96\u62e0\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u304c\u3001WAL\u306e<em>\u30a2\u30fc\u30ab\u30a4\u30d6<\/em>\u306f\u3001\u9577\u671f\u7684\u306a\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u305f\u3081\u306b\u3053\u308c\u3089\u306e\u30ed\u30b0\u3092\u4fdd\u5b58\u3059\u308b\u30e1\u30ab\u30cb\u30ba\u30e0\u3067\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001WAL\u30a2\u30fc\u30ab\u30a4\u30d6\u306e\u8a2d\u5b9a\u306f\u300c\u4e00\u5ea6\u8a2d\u5b9a\u3059\u308c\u3070\u7d42\u308f\u308a\u300d\u3068\u3044\u3046\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8a2d\u5b9a\u30df\u30b9\u3084\u30b5\u30a4\u30ec\u30f3\u30c8\u969c\u5bb3\u3001\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u7406\u89e3\u4e0d\u8db3\u306f\u3001\u58ca\u6ec5\u7684\u306a\u30c7\u30fc\u30bf\u640d\u5931\u3001\u30b9\u30d7\u30ea\u30c3\u30c8\u30d6\u30ec\u30a4\u30f3\u30b7\u30ca\u30ea\u30aa\u3001\u3042\u308b\u3044\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5168\u4f53\u306e\u505c\u6b62\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u5305\u62ec\u7684\u306a\u30ac\u30a4\u30c9\u3067\u306f\u3001PostgreSQL\u306eWAL\u30a2\u30fc\u30ab\u30a4\u30d6\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u89e3\u8aac\u3057\u3001\u30c7\u30fc\u30bf\u640d\u5931\u306b\u3064\u306a\u304c\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3092\u7279\u5b9a\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u56de\u5fa9\u529b\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u672c\u756a\u74b0\u5883\u5411\u3051\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u6982\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2>PostgreSQL WAL\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u7406\u89e3<\/h2>\n<p>\u843d\u3068\u3057\u7a74\u3092\u6398\u308a\u4e0b\u3052\u308b\u524d\u306b\u3001PostgreSQL\u304c\u3069\u306e\u3088\u3046\u306b\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u3092\u51e6\u7406\u3059\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<p>PostgreSQL\u306f\u3001\u3059\u3079\u3066\u306e\u5909\u66f4\u3092<code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff08\u30d0\u30fc\u30b8\u30e7\u30f310\u4ee5\u524d\u306f<code>pg_xlog<\/code>\uff09\u306b\u3042\u308bWAL\u30bb\u30b0\u30e1\u30f3\u30c8\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u306f16MB\uff09\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306f\u3001\u30ed\u30b0\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\uff08LSN\uff09\u306b\u3088\u3063\u3066\u30de\u30fc\u30af\u3055\u308c\u3001\u9806\u6b21\u8a18\u9332\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>WAL\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u3044\u3063\u3071\u3044\u306b\u306a\u308b\u3068\u3001PostgreSQL\u306f\u65b0\u3057\u3044\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u5207\u308a\u66ff\u3048\u307e\u3059\u3002<code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u7121\u9650\u306b\u80a5\u5927\u5316\u3059\u308b\u306e\u3092\u9632\u3050\u305f\u3081\u3001PostgreSQL\u306f\u30af\u30e9\u30c3\u30b7\u30e5\u30ea\u30ab\u30d0\u30ea\u3084\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u4e0d\u8981\u306b\u306a\u3063\u305f\u53e4\u3044WAL\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u518d\u5229\u7528\u307e\u305f\u306f\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n<p><strong>WAL\u30a2\u30fc\u30ab\u30a4\u30d6<\/strong>\u306f\u3001\u3053\u306e\u518d\u5229\u7528\u30d7\u30ed\u30bb\u30b9\u306b\u4ecb\u5165\u3057\u307e\u3059\u3002<code>archive_mode<\/code>\u304c\u6709\u52b9\u306a\u5834\u5408\u3001PostgreSQL\u306f\u30e6\u30fc\u30b6\u30fc\u5b9a\u7fa9\u306e<code>archive_command<\/code>\u3092\u5b9f\u884c\uff08\u307e\u305f\u306fPostgreSQL 15\u4ee5\u964d\u3067\u306f<code>archive_library<\/code>\u3092\u5229\u7528\uff09\u3057\u3001\u5b8c\u4e86\u3057\u305fWAL\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u524a\u9664\u307e\u305f\u306f\u4e0a\u66f8\u304d\u3055\u308c\u308b\u524d\u306b\u3001\u5b89\u5168\u306a\u30bb\u30ab\u30f3\u30c0\u30ea\u306e\u5834\u6240\u306b\u30b3\u30d4\u30fc\u3057\u307e\u3059\u3002<\/p>\n<p>\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\uff08PITR\uff09\u3092\u5b9f\u884c\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e2\u3064\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u5fc5\u8981\u3067\u3059\u3002<br \/>\n1. \u6709\u52b9\u306a\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3002<br \/>\n2. \u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u6642\u70b9\u304b\u3089\u76ee\u6a19\u306e\u5fa9\u65e7\u6642\u70b9\u307e\u3067\u306e\u3001\u9014\u5207\u308c\u308b\u3053\u3068\u306e\u306a\u3044\u30a2\u30fc\u30ab\u30a4\u30d6\u6e08\u307fWAL\u30d5\u30a1\u30a4\u30eb\u306e\u30c1\u30a7\u30fc\u30f3\u3002<\/p>\n<p>\u3053\u306eWAL\u30c1\u30a7\u30fc\u30f3\u304c\u9014\u5207\u308c\u308b\u3068\u3001PITR\u306f\u5931\u6557\u3057\u307e\u3059\u3002<\/p>\n<h2>\u672c\u756a\u74b0\u5883\u5411\u3051\u306eWAL\u30a2\u30fc\u30ab\u30a4\u30d6\u8a2d\u5b9a<\/h2>\n<p>WAL\u30a2\u30fc\u30ab\u30a4\u30d6\u3092\u6709\u52b9\u306b\u3059\u308b\u306b\u306f\u3001<code>postgresql.conf<\/code>\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u8a2d\u5b9a\u306b\u306f\u3001<code>wal_level<\/code>\u306e\u8a2d\u5b9a\u3001<code>archive_mode<\/code>\u306e\u6709\u52b9\u5316\u3001\u304a\u3088\u3073<code>archive_command<\/code>\u306e\u5b9a\u7fa9\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-ini\"># postgresql.conf\nwal_level = replica             # \u30a2\u30fc\u30ab\u30a4\u30d6\u306b\u306f 'replica' \u307e\u305f\u306f 'logical' \u304c\u5fc5\u8981\narchive_mode = on               # \u30a2\u30fc\u30ab\u30a4\u30d0\u30d7\u30ed\u30bb\u30b9\u3092\u6709\u52b9\u5316\narchive_command = 'test ! -f \/mnt\/nfs\/archive\/%f &amp;&amp; cp %p \/mnt\/nfs\/archive\/%f'\narchive_timeout = 600           # 10\u5206\u3054\u3068\u306b\u5f37\u5236\u7684\u306bWAL\u30b9\u30a4\u30c3\u30c1\u3092\u5b9f\u884c\n<\/code><\/pre>\n<p><code>archive_command<\/code>\u306b\u304a\u3044\u3066\uff1a<br \/>\n* <code>%p<\/code> \u306f\u30a2\u30fc\u30ab\u30a4\u30d6\u5bfe\u8c61\u306eWAL\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30d5\u30eb\u30d1\u30b9\u3092\u8868\u3057\u307e\u3059\u3002<br \/>\n* <code>%f<\/code> \u306fWAL\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u8a18\u306e\u8a2d\u5b9a\u306f\u5358\u7d14\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u74b0\u5883\u3067\u5358\u7d14\u306a\u30b7\u30a7\u30eb\u30b3\u30de\u30f3\u30c9\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u306f\u91cd\u5927\u306a\u30ea\u30b9\u30af\u3092\u4f34\u3044\u307e\u3059\u3002<\/p>\n<h2>WAL\u30a2\u30fc\u30ab\u30a4\u30d6\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74<\/h2>\n<h3>\u843d\u3068\u3057\u7a741\uff1a<code>archive_command<\/code>\u306e\u300c\u30b5\u30a4\u30ec\u30f3\u30c8\u6210\u529f\u300d<\/h3>\n<p>PostgreSQL\u306f<code>archive_command<\/code>\u306e\u7d42\u4e86\u30b3\u30fc\u30c9\u306b\u5b8c\u5168\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u30b3\u30de\u30f3\u30c9\u304c<code>0<\/code>\u3092\u8fd4\u3059\u3068\u3001PostgreSQL\u306fWAL\u30d5\u30a1\u30a4\u30eb\u304c\u5b89\u5168\u306b\u30a2\u30fc\u30ab\u30a4\u30d6\u3055\u308c\u305f\u3068\u898b\u306a\u3057\u3001\u5143\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u518d\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u306f\u3001\u30c7\u30fc\u30bf\u304c\u6c38\u7d9a\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u5b89\u5168\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u306a\u304f\u3066\u3082<code>0<\/code>\u3092\u8fd4\u3059\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u5358\u7d14\u306a<code>cp<\/code>\u30b3\u30de\u30f3\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u304c\u5b9b\u5148\u30b5\u30fc\u30d0\u30fc\u306eOS\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u5230\u9054\u3057\u305f\u6642\u70b9\u3067\u6210\u529f\u3092\u8fd4\u3059\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u30c7\u30a3\u30b9\u30af\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\u3055\u308c\u308b\u524d\u306b\u5b9b\u5148\u30b5\u30fc\u30d0\u30fc\u306e\u96fb\u6e90\u304c\u5207\u308c\u308b\u3068\u3001WAL\u30d5\u30a1\u30a4\u30eb\u306f\u5931\u308f\u308c\u307e\u3059\u304c\u3001PostgreSQL\u306f\u3059\u3067\u306b\u30ed\u30fc\u30ab\u30eb\u30b3\u30d4\u30fc\u3092\u524a\u9664\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><strong>\u30ea\u30b9\u30af\uff1a<\/strong> WAL\u30c1\u30a7\u30fc\u30f3\u306e\u65ad\u7d76\u3068PITR\u306e\u5b9f\u884c\u4e0d\u80fd\u3002\u3053\u308c\u306f\u707d\u5bb3\u5fa9\u65e7\u30b7\u30ca\u30ea\u30aa\u306e\u969b\u306b\u521d\u3081\u3066\u767a\u899a\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u7de9\u548c\u7b56\uff1a<\/strong> \u30a2\u30fc\u30ab\u30a4\u30d6\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u540c\u671f\u66f8\u304d\u8fbc\u307f\u3092\u5f37\u5236\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u6a19\u6e96\u306e\u30b7\u30a7\u30eb\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u30c7\u30fc\u30bf\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u3092\u4fdd\u8a3c\u3059\u308b\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u8ee2\u9001\u5f8c\u306b\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3068\u30c1\u30a7\u30c3\u30af\u30b5\u30e0\u3092\u691c\u8a3c\u3059\u308b\u30e9\u30c3\u30d1\u30fc\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u843d\u3068\u3057\u7a742\uff1a<code>pg_wal<\/code>\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306e\u67af\u6e07\uff08WAL\u80a5\u5927\u5316\uff09<\/h3>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u969c\u5bb3\u3001\u6a29\u9650\u306e\u8aa4\u308a\u3001\u307e\u305f\u306f\u5b9b\u5148\u30c7\u30a3\u30b9\u30af\u306e\u30d5\u30eb\u306a\u3069\u306e\u7406\u7531\u3067<code>archive_command<\/code>\u304c\u5931\u6557\uff08\u975e\u30bc\u30ed\u306e\u7d42\u4e86\u30b3\u30fc\u30c9\u3092\u8fd4\u3059\uff09\u3057\u305f\u5834\u5408\u3001PostgreSQL\u306fWAL\u30d5\u30a1\u30a4\u30eb\u3092<code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4fdd\u6301\u3057\u3001\u30b3\u30de\u30f3\u30c9\u3092\u7121\u671f\u9650\u306b\u518d\u8a66\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u3055\u308c\u3066\u3044\u306a\u3044WAL\u304c\u524a\u9664\u3055\u308c\u308b\u306e\u3092\u9632\u304e\u30c7\u30fc\u30bf\u640d\u5931\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u304c\u3001\u6df1\u523b\u306a\u53ef\u7528\u6027\u306e\u30ea\u30b9\u30af\u304c\u751f\u3058\u307e\u3059\u3002<code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c100%\u307e\u3067\u57cb\u307e\u3063\u305f\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306b\u3042\u308b\u5834\u5408\u3001PostgreSQL\u306f<code>PANIC<\/code>\u3092\u767a\u884c\u3057\u3066\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002\u7a7a\u304d\u5bb9\u91cf\u304c\u78ba\u4fdd\u3055\u308c\u308b\u307e\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u518d\u8d77\u52d5\u3057\u307e\u305b\u3093\u3002<\/p>\n<p><strong>\u30ea\u30b9\u30af\uff1a<\/strong> <code>pg_wal<\/code>\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306e\u30d5\u30eb\u306b\u3088\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5168\u4f53\u306e\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u3002<\/p>\n<p><strong>\u7de9\u548c\u7b56\uff1a<\/strong><br \/>\n1. <code>pg_wal<\/code>\u306f\u5e38\u306b\u5c02\u7528\u306e\u30c7\u30a3\u30b9\u30af\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306b\u914d\u7f6e\u3059\u308b\u3002<br \/>\n2. <code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30b5\u30a4\u30ba\u3092\u53b3\u683c\u306b\u76e3\u8996\u3059\u308b\u3002<br \/>\n3. <code>pg_stat_archiver<\/code>\u30d3\u30e5\u30fc\u3092\u76e3\u8996\u3057\u3001\u5931\u6557\u3057\u3066\u3044\u308b\u30a2\u30fc\u30ab\u30a4\u30d6\u30b3\u30de\u30f3\u30c9\u3092\u5373\u5ea7\u306b\u691c\u77e5\u3059\u308b\u3002<\/p>\n<h3>\u843d\u3068\u3057\u7a743\uff1a\u4e0d\u5b8c\u5168\u306a\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/h3>\n<p>\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30d7\u30ed\u30bb\u30b9<em>\u4e2d<\/em>\u306b\u751f\u6210\u3055\u308c\u305fWAL\u30d5\u30a1\u30a4\u30eb\u306a\u3057\u3067\u306f\u5f79\u306b\u7acb\u3061\u307e\u305b\u3093\u3002\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30ec\u30d9\u30eb\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3084\u3001WAL\u3092\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u305b\u305a\u306b\uff08<code>-X stream<\/code>\u306a\u3057\u3067\uff09<code>pg_basebackup<\/code>\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u958b\u59cb\u304b\u3089\u7d42\u4e86\u307e\u3067\u306e\u9593\u306b\u751f\u6210\u3055\u308c\u305fWAL\u30d5\u30a1\u30a4\u30eb\u304c\u6b63\u5e38\u306b\u30a2\u30fc\u30ab\u30a4\u30d6\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30a2\u30fc\u30ab\u30a4\u30d0\u304c\u9045\u5ef6\u307e\u305f\u306f\u5931\u6557\u3057\u3066\u304a\u308a\u3001\u305d\u308c\u3089\u306e\u7279\u5b9a\u306eWAL\u30d5\u30a1\u30a4\u30eb\u304c\u5931\u308f\u308c\u305f\u5834\u5408\u3001\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u4e00\u8cab\u3057\u305f\u72b6\u614b\u306b\u5fa9\u5143\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p><strong>\u30ea\u30b9\u30af\uff1a<\/strong> \u7834\u640d\u3057\u305f\u3001\u307e\u305f\u306f\u5fa9\u65e7\u4e0d\u53ef\u80fd\u306a\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3002<\/p>\n<p><strong>\u7de9\u548c\u7b56\uff1a<\/strong> <code>pg_basebackup -X stream<\/code>\u3092\u4f7f\u7528\u3057\u3066\u5fc5\u8981\u306aWAL\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30da\u30a4\u30ed\u30fc\u30c9\u81ea\u4f53\u306b\u542b\u3081\u308b\u304b\u3001\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068WAL\u30bb\u30b0\u30e1\u30f3\u30c8\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u81ea\u52d5\u7684\u306b\u7ba1\u7406\u3059\u308b\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u843d\u3068\u3057\u7a744\uff1a\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e\u6df7\u4e71\u3068\u30b9\u30d7\u30ea\u30c3\u30c8\u30d6\u30ec\u30a4\u30f3\u30b7\u30ca\u30ea\u30aa<\/h3>\n<p>\u30b9\u30bf\u30f3\u30d0\u30a4\u30b5\u30fc\u30d0\u30fc\u304c\u30d7\u30e9\u30a4\u30de\u30ea\u306b\u6607\u683c\u3059\u308b\u3068\u3001PostgreSQL\u306f\u300c\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3ID\u300d\uff08WAL\u30d5\u30a1\u30a4\u30eb\u540d\u306e\u6700\u521d\u306e\u90e8\u5206\u3001\u4f8b\uff1a<code>0000000200000001000000A4<\/code>\uff09\u3092\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u65b0\u3057\u3044\u30d7\u30e9\u30a4\u30de\u30ea\u304c\u53e4\u3044\u30d7\u30e9\u30a4\u30de\u30ea\u306eWAL\u5c65\u6b74\u3092\u4e0a\u66f8\u304d\u3059\u308b\u306e\u3092\u9632\u304e\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u53e4\u3044\u30d7\u30e9\u30a4\u30de\u30ea\u304c\u9069\u5207\u306b\u30d5\u30a7\u30f3\u30b7\u30f3\u30b0\u3055\u308c\u305a\u306b\u8aa4\u3063\u3066\u8d77\u52d5\u3055\u308c\u305f\u5834\u5408\uff08\u30b9\u30d7\u30ea\u30c3\u30c8\u30d6\u30ec\u30a4\u30f3\u30b7\u30ca\u30ea\u30aa\uff09\u3001\u53e4\u3044\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3092\u4f7f\u7528\u3057\u3066\u540c\u3058\u30a2\u30fc\u30ab\u30a4\u30d6\u5834\u6240\u306bWAL\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30c3\u30b7\u30e5\u3057\u3088\u3046\u3068\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<code>archive_command<\/code>\u304c\u76f2\u76ee\u7684\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u4e0a\u66f8\u304d\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u30fb\u30ea\u30dd\u30b8\u30c8\u30ea\u304c\u7834\u640d\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><strong>\u30ea\u30b9\u30af\uff1a<\/strong> WAL\u30d5\u30a1\u30a4\u30eb\u306e\u4e0a\u66f8\u304d\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u306e\u7834\u640d\u3001\u304a\u3088\u3073\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5fa9\u65e7\u4e0d\u80fd\u3002<\/p>\n<p><strong>\u7de9\u548c\u7b56\uff1a<\/strong> <code>archive_command<\/code>\u306f\u3001\u65e2\u5b58\u306e\u30d5\u30a1\u30a4\u30eb\u3092<em>\u6c7a\u3057\u3066<\/em>\u4e0a\u66f8\u304d\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u524d\u8ff0\u306e\u57fa\u672c\u8a2d\u5b9a\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u65e2\u306b\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u660e\u793a\u7684\u306b\u5931\u6557\u3055\u305b\u308b\u305f\u3081\u306b<code>test ! -f \/mnt\/nfs\/archive\/%f<\/code>\u3092\u4f7f\u7528\u3057\u305f\u3053\u3068\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u30c7\u30fc\u30bf\u640d\u5931\u30ea\u30b9\u30af\u306e\u7de9\u548c\uff1a\u672c\u756a\u74b0\u5883\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<p>PostgreSQL\u306e\u30a2\u30fc\u30ab\u30a4\u30d6\u6226\u7565\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>1. \u30a2\u30fc\u30ab\u30a4\u30d0\u30d7\u30ed\u30bb\u30b9\u3092\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u76e3\u8996\u3059\u308b<\/h3>\n<p>PostgreSQL\u306f\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u30d7\u30ed\u30bb\u30b9\u306e\u6210\u529f\u3068\u5931\u6557\u3092\u8ffd\u8de1\u3059\u308b\u7d44\u307f\u8fbc\u307f\u30d3\u30e5\u30fc<code>pg_stat_archiver<\/code>\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d3\u30e5\u30fc\u3092\u76e3\u8996\u30b9\u30bf\u30c3\u30af\uff08Prometheus\u3001Datadog\u3001Zabbix\u306a\u3069\uff09\u306b\u7d71\u5408\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-sql\">SELECT \n    archived_count,\n    last_archived_wal,\n    last_archived_time,\n    failed_count,\n    last_failed_wal,\n    last_failed_time,\n    stats_reset\nFROM pg_stat_archiver;\n<\/code><\/pre>\n<p><strong>\u8a2d\u5b9a\u3059\u3079\u304d\u30a2\u30e9\u30fc\u30c8\u306e\u3057\u304d\u3044\u5024\uff1a<\/strong><br \/>\n* <code>failed_count<\/code>\u304c\u5897\u52a0\u3057\u305f\u5834\u5408\u306b\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059\u3002<br \/>\n* <code>now()<\/code>\u3068<code>last_archived_time<\/code>\u306e\u5dee\u304cRPO\u306e\u3057\u304d\u3044\u5024\uff08\u4f8b\uff1a15\u5206\uff09\u3092\u8d85\u3048\u305f\u5834\u5408\u306b\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059\u3002\u305f\u3060\u3057\u3001<code>archive_timeout<\/code>\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u9650\u308a\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u5c11\u306a\u3044\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u81ea\u7136\u306b\u9045\u5ef6\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>2. <code>archive_timeout<\/code>\u3092\u6d3b\u7528\u3059\u308b<\/h3>\n<p>\u66f8\u304d\u8fbc\u307f\u30dc\u30ea\u30e5\u30fc\u30e0\u304c\u5c11\u306a\u3044\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f\u300116MB\u306eWAL\u30d5\u30a1\u30a4\u30eb\u304c\u3044\u3063\u3071\u3044\u306b\u306a\u308b\u307e\u3067\u306b\u6570\u6642\u9593\u304b\u304b\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3044\u3063\u3071\u3044\u306b\u306a\u308b\u307e\u3067\u30a2\u30fc\u30ab\u30a4\u30d6\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002\u30b5\u30fc\u30d0\u30fc\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u3066\u30ed\u30fc\u30ab\u30eb\u30c7\u30a3\u30b9\u30af\u304c\u5931\u308f\u308c\u308b\u3068\u3001\u6570\u6642\u9593\u5206\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u5931\u308f\u308c\u307e\u3059\u3002<\/p>\n<p><code>archive_timeout = 600<\/code>\uff0810\u5206\uff09\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001WAL\u30d5\u30a1\u30a4\u30eb\u304c\u3044\u3063\u3071\u3044\u3067\u306a\u304f\u3066\u3082\u3001PostgreSQL\u306f\u5f37\u5236\u7684\u306b\u65b0\u3057\u3044WAL\u30d5\u30a1\u30a4\u30eb\u306b\u5207\u308a\u66ff\u3048\u3066\u73fe\u5728\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u30a2\u30fc\u30ab\u30a4\u30d6\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u90e8\u5206\u7684\u306b\u3057\u304b\u57cb\u307e\u3063\u3066\u3044\u306a\u3044WAL\u30d5\u30a1\u30a4\u30eb\u306b\u3088\u308b\u30b9\u30c8\u30ec\u30fc\u30b8\u4f7f\u7528\u91cf\u306e\u308f\u305a\u304b\u306a\u5897\u52a0\u3068\u5f15\u304d\u63db\u3048\u306b\u3001RPO\u304c10\u5206\u3092\u8d85\u3048\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3>3. <code>archive_library<\/code>\u3078\u306e\u79fb\u884c\uff08PostgreSQL 15\u4ee5\u964d\uff09<\/h3>\n<p>\u5f93\u6765\u3001<code>archive_command<\/code>\u306fWAL\u30d5\u30a1\u30a4\u30eb\u3054\u3068\u306b\u65b0\u3057\u3044\u30b7\u30a7\u30eb\u30d7\u30ed\u30bb\u30b9\u3092\u751f\u6210\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u6bce\u5206\u6570\u767e\u306eWAL\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3059\u308b\u9ad8\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u74b0\u5883\u3067\u306f\u3001\u30b7\u30a7\u30eb\u30d7\u30ed\u30bb\u30b9\u306e\u30d5\u30a9\u30fc\u30af\u306b\u3088\u308b\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>PostgreSQL 15\u3067\u306f<code>archive_library<\/code>\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5c0e\u5165\u3055\u308c\u3001\u52d5\u7684\u306b\u30ed\u30fc\u30c9\u3055\u308c\u308bC\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u3088\u3063\u3066WAL\u30a2\u30fc\u30ab\u30a4\u30d6\u3092\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b7\u30a7\u30eb\u30d5\u30a9\u30fc\u30af\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u6392\u9664\u3055\u308c\u3001\u3088\u308a\u5805\u7262\u3067\u9ad8\u6027\u80fd\u306a\u30a2\u30fc\u30ab\u30a4\u30d6\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002PostgreSQL 15\u4ee5\u4e0a\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u30a2\u30fc\u30ab\u30a4\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30c4\u30fc\u30eb\u3092\u63a2\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>4. \u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\u3092\u5b9a\u671f\u7684\u306b\u30c6\u30b9\u30c8\u3059\u308b<\/h3>\n<p>\u30c6\u30b9\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3067\u306f\u306a\u304f\u3001\u5358\u306a\u308b\u300c\u9858\u3044\u300d\u3067\u3059\u3002WAL\u30a2\u30fc\u30ab\u30a4\u30d6\u304c\u6b63\u3057\u304f\u6a5f\u80fd\u3057\u3066\u3044\u308b\u3053\u3068\u3001WAL\u30c1\u30a7\u30fc\u30f3\u304c\u9014\u5207\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3001\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u552f\u4e00\u306e\u65b9\u6cd5\u306f\u3001\u5b9a\u671f\u7684\u306a\u81ea\u52d5PITR\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u4e00\u6642\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7acb\u3061\u4e0a\u3052\u3001\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u5fa9\u5143\u3057\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u304b\u3089\u53d6\u5f97\u3059\u308b\u3088\u3046\u306b<code>restore_command<\/code>\u3092\u8a2d\u5b9a\u3057\u3001\u7279\u5b9a\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u307e\u3067\u30ea\u30ab\u30d0\u30ea\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u4e00\u8cab\u3057\u305f\u72b6\u614b\u306b\u9054\u3057\u3001\u63a5\u7d9a\u3092\u53d7\u3051\u5165\u308c\u3089\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>CloudSave\u306b\u3088\u308b\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u30ea\u30ab\u30d0\u30ea<\/h2>\n<p><code>archive_command<\/code>\u306e\u305f\u3081\u306e\u30ab\u30b9\u30bf\u30e0\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u7ba1\u7406\u3001WAL\u306e\u91cd\u8907\u6392\u9664\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u306e\u5b89\u5168\u306a\u30aa\u30d5\u30b5\u30a4\u30c8\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u78ba\u4fdd\u306f\u3001IT\u30c1\u30fc\u30e0\u306b\u3068\u3063\u3066\u3059\u3050\u306b\u904b\u7528\u4e0a\u306e\u8ca0\u62c5\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u3001CloudSave\u304c\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30baPostgreSQL\u74b0\u5883\u306b\u5927\u304d\u306a\u4fa1\u5024\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002CloudSave\u306f\u3001PostgreSQL\u306e\u30cd\u30a4\u30c6\u30a3\u30d6\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304a\u3088\u3073WAL\u30a2\u30fc\u30ab\u30a4\u30d6API\u3068\u76f4\u63a5\u7d71\u5408\u3055\u308c\u3001\u524d\u8ff0\u306e\u624b\u52d5\u306b\u3088\u308b\u843d\u3068\u3057\u7a74\u3092\u6392\u9664\u3057\u307e\u3059\u3002<\/p>\n<p>\u58ca\u308c\u3084\u3059\u3044bash\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u66f8\u304f\u4ee3\u308f\u308a\u306b\u3001CloudSave\u306f\u4ee5\u4e0b\u3092\u5b9f\u73fe\u3059\u308b\u5805\u7262\u306a\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u30d9\u30fc\u30b9\u307e\u305f\u306f\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u30ec\u30b9\u306e\u7d71\u5408\u3092\u63d0\u4f9b\u3057\u307e\u3059\uff1a<br \/>\n* <strong>\u914d\u4fe1\u306e\u4fdd\u8a3c\uff1a<\/strong> \u6a19\u6e96\u306e\u30b7\u30a7\u30eb\u30b3\u30de\u30f3\u30c9\u3092\u3001\u5b89\u5168\u306a\u30aa\u30d5\u30b5\u30a4\u30c8\u307e\u305f\u306f\u30af\u30e9\u30a6\u30c9\u30b9\u30c8\u30ec\u30fc\u30b8\u3078\u306e\u691c\u8a3c\u6e08\u307f\u30fb\u30c1\u30a7\u30c3\u30af\u30b5\u30e0\u691c\u8a3c\u6e08\u307f\u306e\u8ee2\u9001\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<br \/>\n* <strong>WAL\u80a5\u5927\u5316\u306e\u9632\u6b62\uff1a<\/strong> <code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u7a4d\u6975\u7684\u306b\u76e3\u8996\u3057\u3001\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u304c\u67af\u6e07\u3059\u308b\u305a\u3063\u3068\u524d\u306b\u7ba1\u7406\u8005\u306b\u8b66\u544a\u3057\u307e\u3059\u3002<br \/>\n* <strong>PITR\u306e\u81ea\u52d5\u5316\uff1a<\/strong> \u76f4\u611f\u7684\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u901a\u3058\u3066\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\u3092\u7c21\u7d20\u5316\u3057\u307e\u3059\u3002\u5fa9\u65e7\u3057\u305f\u3044\u6b63\u78ba\u306a\u5206\u3092\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u3001CloudSave\u304c\u6b63\u3057\u3044\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u81ea\u52d5\u7684\u306b\u53d6\u5f97\u3057\u3001\u305d\u306e\u72b6\u614b\u306b\u9054\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306aWAL\u30d5\u30a1\u30a4\u30eb\u306e\u6b63\u78ba\u306a\u30b7\u30fc\u30b1\u30f3\u30b9\u3092\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u3057\u307e\u3059\u3002<br \/>\n* <strong>\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e\u51e6\u7406\uff1a<\/strong> PostgreSQL\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u5c65\u6b74\u3092\u30a4\u30f3\u30c6\u30ea\u30b8\u30a7\u30f3\u30c8\u306b\u7ba1\u7406\u3057\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3084\u30b9\u30d7\u30ea\u30c3\u30c8\u30d6\u30ec\u30a4\u30f3\u30b7\u30ca\u30ea\u30aa\u304c\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u7834\u640d\u3055\u305b\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>WAL\u7ba1\u7406\u306e\u91cd\u52b4\u50cd\u3092CloudSave\u306b\u30aa\u30d5\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u3067\u3001DBA\u306f\u30af\u30a8\u30ea\u306e\u6700\u9069\u5316\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u96c6\u4e2d\u3067\u304d\u3001RPO\u304a\u3088\u3073RTO\u306eSLA\u304c\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30b0\u30ec\u30fc\u30c9\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u3088\u3063\u3066\u4fdd\u8b77\u3055\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u5b89\u5fc3\u611f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>PostgreSQL\u306eWAL\u30a2\u30fc\u30ab\u30a4\u30d6\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u707d\u5bb3\u5fa9\u65e7\u306e\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u3067\u3059\u3002\u3042\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304b\u3089\u5225\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3068\u3044\u3046\u6982\u5ff5\u306f\u5358\u7d14\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u30b5\u30a4\u30ec\u30f3\u30c8\u969c\u5bb3\u3001\u30c7\u30a3\u30b9\u30af\u67af\u6e07\u3001\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306e\u4e56\u96e2\u3068\u3044\u3063\u305f\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u306b\u6df1\u523b\u306a\u30ea\u30b9\u30af\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n<p><code>pg_wal<\/code>\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u7406\u89e3\u3057\u3001\u7834\u58ca\u7684\u306a<code>archive_command<\/code>\u8a2d\u5b9a\u3092\u53b3\u683c\u306b\u907f\u3051\u3001<code>pg_stat_archiver<\/code>\u3092\u76e3\u8996\u3057\u3001CloudSave\u306e\u3088\u3046\u306a\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u969c\u5bb3\u3001\u4eba\u70ba\u7684\u30df\u30b9\u3001\u58ca\u6ec5\u7684\u306a\u505c\u6b62\u306b\u8010\u3048\u3001\u30b3\u30df\u30c3\u30c8\u3055\u308c\u305f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u4e00\u5207\u5931\u3046\u3053\u3068\u306a\u304f\u751f\u304d\u6b8b\u308c\u308b\u3001\u56de\u5fa9\u529b\u306e\u3042\u308bPostgreSQL\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/p>\n<blockquote>\n<p>\u30c7\u30fc\u30bf\u640d\u5931\u306b\u3064\u306a\u304c\u308bPostgreSQL WAL\u30a2\u30fc\u30ab\u30a4\u30d6\u306e\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3092\u767a\u898b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5c02\u9580\u7684\u306aDBA\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u8a2d\u5b9a\u306e\u30d2\u30f3\u30c8\u3001\u304a\u3088\u3073\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u305f\u3081\u306e\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\uff08PITR\uff09\u3092\u78ba\u4fdd\u3059\u308b\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>**<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"PostgreSQL WAL Archiving: Pitfalls & Data Loss 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