{"id":9854,"date":"2018-06-18T02:46:22","date_gmt":"2018-06-18T02:46:22","guid":{"rendered":"https:\/\/kiencang.net\/?p=9854"},"modified":"2018-06-18T02:46:22","modified_gmt":"2018-06-18T02:46:22","slug":"faq-wp-super-cache","status":"publish","type":"post","link":"https:\/\/kiencang.net\/faq-wp-super-cache\/","title":{"rendered":"M\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 WP Super Cache"},"content":{"rendered":"<p>Plugin WP Super Cache t\u1ea1o file html t\u0129nh t\u1eeb blog WordPress \u0111\u1ed9ng. Sau khi file html \u0111\u01b0\u1ee3c t\u1ea1o, m\u00e1y ch\u1ee7 web s\u1ebd s\u1eed d\u1ee5ng file \u0111\u00f3 thay v\u00ec x\u1eed l\u00fd c\u00e1c \u0111o\u1ea1n m\u00e3 PHP (c\u1ee7a WordPress) n\u1eb7ng v\u00e0 t\u1ed1n k\u00e9m h\u01a1n.<\/p>\n<p>C\u00e1c file html t\u0129nh s\u1ebd \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 cho \u0111a s\u1ed1 ng\u01b0\u1eddi d\u00f9ng:<\/p>\n<ul>\n<li>Nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng \u0111\u0103ng nh\u1eadp.<\/li>\n<li>Nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng \u0111\u1ec3 l\u1ea1i nh\u1eadn x\u00e9t tr\u00ean blog.<\/li>\n<li>Ho\u1eb7c nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng xem b\u00e0i \u0111\u0103ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi m\u1eadt kh\u1ea9u (<em>password protected post<\/em>).<\/li>\n<\/ul>\n<p>99% ng\u01b0\u1eddi xem trang web s\u1ebd \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 b\u1edfi file html t\u0129nh. M\u1ed9t file cache c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0n l\u1ea7n. Nh\u1eefng ng\u01b0\u1eddi truy c\u1eadp kh\u00e1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 b\u1edfi file cache t\u00f9y ch\u1ec9nh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang d\u00e0nh cho h\u1ecd. N\u1ebfu h\u1ecd \u0111\u0103ng nh\u1eadp, ho\u1eb7c \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn nh\u1eefng chi ti\u1ebft \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb v\u00e0 t\u1ea1o cache cho ch\u00fang.<\/p>\n<p><!--more--><\/p>\n<p>Plugin cung c\u1ea5p file cache theo 3 c\u00e1ch (x\u1ebfp theo th\u1ee9 h\u1ea1ng t\u1ed1c \u0111\u1ed9):<\/p>\n<ol>\n<li><em>Chuy\u00ean gia<\/em>. Ph\u01b0\u01a1ng th\u1ee9c t\u0103ng t\u1ed1c cao nh\u1ea5t (fastest method) l\u00e0 s\u1eed d\u1ee5ng mod_rewrite c\u1ee7a Apache (ho\u1eb7c b\u1ea5t k\u1ef3 module n\u00e0o t\u01b0\u01a1ng t\u1ef1 m\u00e0 web server c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3) \u0111\u1ec3 ph\u00e2n ph\u1ed1i c\u00e1c file html t\u0129nh &#8220;si\u00eau t\u1ea3i\/supercached&#8221;. N\u00f3 ho\u00e0n to\u00e0n b\u1ecf qua PHP v\u00e0 c\u1ef1c nhanh. N\u1ebfu m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, ph\u01b0\u01a1ng th\u1ee9c n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ed1i ph\u00f3 b\u1eb1ng c\u00e1c truy v\u1ea5n &#8220;nh\u1eb9 h\u01a1n&#8221;. \u0110i\u1ec1u n\u00e0y y\u00eau c\u1ea7u module mod_rewrite c\u1ee7a Apache (n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c <a href=\"https:\/\/kiencang.net\/cau-truc-url-wordpress\/\">li\u00ean k\u1ebft t\u0129nh t\u00f9y ch\u1ec9nh<\/a>\u00a0(permalink) th\u00ec c\u00f3 l\u1ebd n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i) v\u00e0 m\u1ed9t s\u1ed1 ch\u1ec9nh s\u1eeda \u1edf file .htaccess &#8211; nh\u01b0ng thao t\u00e1c n\u00e0y c\u1ea7n c\u1ea9n th\u1eadn v\u00ec ch\u1ec9nh s\u1eeda file .htaccess c\u00f3 nguy c\u01a1 l\u00e0m trang c\u1ee7a b\u1ea1n kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c n\u1ebfu b\u1ea1n s\u1eeda kh\u00f4ng \u0111\u00fang c\u00e1ch.<\/li>\n<li><em>\u0110\u01a1n gi\u1ea3n<\/em>. File t\u0129nh do Supercache t\u1ea1o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 b\u1edfi PHP v\u00e0 \u0111\u00e2y l\u00e0 c\u00e1ch ch\u00fang t\u00f4i khuy\u1ebfn kh\u00edch s\u1eed d\u1ee5ng plugin n\u00e0y. Plugin s\u1ebd ph\u1ee5c v\u1ee5 file &#8220;si\u00eau t\u0129nh&#8221; n\u1ebfu n\u00f3 t\u1ed3n t\u1ea1i v\u00e0 n\u00f3 g\u1ea7n nhanh b\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c mod_rewrite. C\u1ea5u h\u00ecnh c\u0169ng d\u1ec5 h\u01a1n, c\u0169ng nh\u01b0 file .htaccess kh\u00f4ng c\u1ea7n ph\u1ea3i thay \u0111\u1ed5i. B\u1ea1n v\u1eabn c\u1ea7n permalink t\u00f9y ch\u1ec9nh. B\u1ea1n c\u00f3 th\u1ec3 gi\u1eef c\u00e1c ph\u1ea7n c\u1ee7a trang \u0111\u1ed9ng trong ch\u1ebf \u0111\u1ed9 caching n\u00e0y.<\/li>\n<li><em>Caching ki\u1ec3u WP-Cache<\/em>. C\u00e1i n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cache trang cho ng\u01b0\u1eddi d\u00f9ng \u0111\u00e3 bi\u1ebft, URLs c\u00f3 th\u00f4ng s\u1ed1 (parameters) v\u00e0 ngu\u1ed3n c\u1ea5p. Ng\u01b0\u1eddi d\u00f9ng \u0111\u00e3 bi\u1ebft l\u00e0 ng\u01b0\u1eddi d\u00f9ng \u0111\u00e3 \u0111\u0103ng nh\u1eadp (logged in users), ng\u01b0\u1eddi gh\u00e9 th\u0103m \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn ho\u1eb7c nh\u1eefng ng\u01b0\u1eddi c\u1ea7n ph\u1ea3i hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u t\u00f9y ch\u1ec9nh d\u1ef1a v\u00e0o ng\u01b0\u1eddi d\u00f9ng. N\u00f3 l\u00e0 ph\u01b0\u01a1ng th\u1ee9c cache m\u1ec1m d\u1ebbo nh\u1ea5t v\u00e0 h\u01a1i ch\u1eadm. C\u00e1ch caching WP-Cache c\u0169ng s\u1ebd cache trang cho ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng \u0111\u0103ng nh\u1eadp n\u1ebfu ph\u01b0\u01a1ng th\u1ee9c supercaching b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 c\u00f3 c\u00e1c ph\u1ea7n \u0111\u1ed9ng cho trang c\u1ee7a b\u1ea1n \u1edf ch\u1ebf \u0111\u1ed9 n\u00e0y. Ch\u1ebf \u0111\u1ed9 n\u00e0y lu\u00f4n \u0111\u01b0\u1ee3c b\u1eadt nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a caching cho ng\u01b0\u1eddi d\u00f9ng \u0111\u0103ng nh\u1eadp, URLs v\u1edbi th\u00f4ng s\u1ed1, ho\u1eb7c ngu\u1ed3n c\u1ea5p d\u1eef li\u1ec7u theo c\u00e1ch ri\u00eang. Thi\u1ebft l\u1eadp h\u1eb1ng s\u1ed1 &#8220;DISABLE_SUPERCACHE&#8221; l\u00e0 1 trong file wp-config.php n\u1ebfu b\u1ea1n mu\u1ed1n s\u1eed d\u1ee5ng ch\u1ec9 ph\u01b0\u01a1ng th\u1ee9c WP-Cache.<\/li>\n<\/ol>\n<p>N\u1ebfu b\u1ea1n kh\u00f4ng th\u00edch ch\u1ec9nh s\u1eeda file PHP th\u00ec h\u00e3y s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c simple (\u0111\u01a1n gi\u1ea3n). N\u00f3 d\u1ec5 d\u00e0ng thi\u1ebft l\u1eadp v\u00e0 c\u0169ng r\u1ea5t nhanh.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6577d6c1a4c36\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d6c1a4c36\"  type=\"checkbox\" id=\"item-6577d6c1a4c36\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/#Cac_thiet_lap_khuyen_dung\" title=\"C\u00e1c thi\u1ebft l\u1eadp khuy\u00ean d\u00f9ng\">C\u00e1c thi\u1ebft l\u1eadp khuy\u00ean d\u00f9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/#Preloading\" title=\"Preloading\">Preloading<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/#Thu_gom_rac\" title=\"Thu gom r\u00e1c\">Thu gom r\u00e1c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/#CDN\" title=\"CDN\">CDN<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/#Tuy_chinh_caching\" title=\"T\u00f9y ch\u1ec9nh caching\">T\u00f9y ch\u1ec9nh caching<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/#Sua_cac_loi_co_the_xay_ra\" title=\"S\u1eeda c\u00e1c l\u1ed7i c\u00f3 th\u1ec3 x\u1ea3y ra\">S\u1eeda c\u00e1c l\u1ed7i c\u00f3 th\u1ec3 x\u1ea3y ra<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Cac_thiet_lap_khuyen_dung\"><\/span>C\u00e1c thi\u1ebft l\u1eadp khuy\u00ean d\u00f9ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>S\u1eed d\u1ee5ng Simple caching.<\/li>\n<li>N\u00e9n trang (compress pages).<\/li>\n<li>Kh\u00f4ng cache trang cho ng\u01b0\u1eddi d\u00f9ng \u0111\u0103ng nh\u1eadp.<\/li>\n<li>Cache rebuild.<\/li>\n<li>H\u1ed7 tr\u1ee3 CDN.<\/li>\n<li>M\u1edf r\u1ed9ng ki\u1ec3m tra trang ch\u1ee7.<\/li>\n<\/ol>\n<p>Thu gom r\u00e1c (garbage collection) l\u00e0 h\u00e0nh \u0111\u1ed9ng d\u1ecdn s\u1ea1ch file cache \u0111\u00e3 qu\u00e1 h\u1ea1n v\u00e0 qu\u00e1 c\u0169 (out of date and stale). Kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c cho vi\u1ec7c \u0111\u1eb7t th\u1eddi gian h\u1ebft h\u1ea1n nh\u01b0ng \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u t\u1ed1t l\u00e0 1800 gi\u00e2y.<\/p>\n<p>Xem x\u00e9t vi\u1ec7c x\u00f3a n\u1ed9i dung c\u1ee7a h\u1ed9p v\u0103n b\u1ea3n &#8220;T\u1eeb ch\u1ed1i User Agents&#8221; v\u00e0 cho ph\u00e9p m\u00e1y t\u00ecm ki\u1ebfm cache files cho b\u1ea1n.<\/p>\n<p>T\u1ea3i tr\u01b0\u1edbc (preload) nhi\u1ec1u b\u00e0i vi\u1ebft nh\u1ea5t b\u1ea1n c\u00f3 th\u1ec3 th\u00f4ng qua b\u1eadt ch\u1ebf \u0111\u1ed9 &#8220;Preload Mode&#8221;. Thu gom c\u00e1c file cache c\u0169 s\u1ebd b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a. N\u1ebfu b\u1ea1n kh\u00f4ng quan t\u00e2m \u0111\u1ebfn vi\u1ec7c c\u00e1c sidebar \u1edf ph\u1ea7n widgets c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean h\u00e3y thi\u1ebft l\u1eadp kho\u1ea3ng th\u1eddi gian t\u1ea3i tr\u01b0\u1edbc l\u00e0 2880 ph\u00fat (2 ng\u00e0y) nh\u1edd th\u1ebf t\u1ea5t c\u1ea3 c\u00e1c vi\u1ebft c\u1ee7a b\u1ea1n s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c cache l\u1ea1i qu\u00e1 th\u01b0\u1eddng xuy\u00ean. Khi preload \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, file cache cho b\u00e0i vi\u1ebft \u0111ang l\u00e0m m\u1edbi (refresh) s\u1ebd b\u1ecb x\u00f3a v\u00e0 sau \u0111\u00f3 \u0111\u01b0\u1ee3c t\u1ea1o l\u1ea1i. Sau \u0111\u00f3 tr\u00ecnh thu gom r\u00e1c thu gom t\u1ea5t c\u00e1c file c\u0169 \u0111\u1ec3 x\u00f3a b\u1ecf c\u00e1c file cache c\u0169. Th\u1eadm ch\u00ed ngay c\u1ea3 khi ch\u1ebf \u0111\u1ed9 preload \u0111\u01b0\u1ee3c b\u1eadt \u0111\u1ec3 cache file, file cache \u0111\u00f3 v\u1eabn b\u1ecb x\u00f3a khi b\u00e0i post \u0111\u01b0\u1ee3c ch\u1ec9nh s\u1eeda ho\u1eb7c c\u00f3 b\u00ecnh lu\u1eadn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Preloading\"><\/span>Preloading<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c file cache cho c\u00e1c b\u00e0i vi\u1ebft (posts), th\u01b0 m\u1ee5c v\u00e0 c\u00e1c th\u1ebb tag cho trang c\u1ee7a b\u1ea1n th\u00f4ng qua preloading. Preloading s\u1ebd gh\u00e9 th\u0103m t\u1eebng trang tr\u00ean website \u0111\u1ec3 t\u1ea1o ra c\u00e1c trang cache, gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 ng\u01b0\u1eddi gh\u00e9 th\u0103m n\u00e0o v\u00e0o trang. Do t\u00ednh ch\u1ea5t t\u1ef1 nhi\u00ean tu\u1ea7n t\u1ef1 c\u1ee7a ch\u1ee9c n\u0103ng n\u00e0y, c\u00f3 th\u1ec3 s\u1ebd m\u1ea5t th\u1eddi gian \u0111\u1ec3 preload ho\u00e0n th\u00e0nh n\u1ebfu website c\u1ee7a b\u1ea1n c\u00f3 nhi\u1ec1u b\u00e0i post.<\/p>\n<p>\u0110\u1ec3 preload hi\u1ec7u qu\u1ea3 h\u01a1n, c\u00f3 th\u1ec3 h\u1eefu \u00edch n\u1ebfu b\u1ea1n v\u00f4 hi\u1ec7u h\u00f3a ch\u1ee9c n\u0103ng thu gom r\u00e1c, nh\u1edd th\u1ebf m\u00e0 c\u00e1c file cache c\u0169 h\u01a1n kh\u00f4ng b\u1ecb x\u00f3a. \u0110i\u1ec1u \u0111\u00f3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch b\u1eadt ch\u1ebf \u0111\u1ed9 &#8220;Preload Mode&#8221; trong ph\u1ea7n c\u00e0i \u0111\u1eb7t. Tuy nhi\u00ean h\u00e3y l\u01b0u \u00fd r\u1eb1ng, cu\u1ed1i c\u00f9ng c\u00e1c trang s\u1ebd tr\u1edf n\u00ean qu\u00e1 c\u0169\/qu\u00e1 h\u1ea1n (out of date), nh\u01b0ng c\u00e1c c\u1eadp nh\u1eadt b\u1eb1ng c\u00e1ch g\u1eedi b\u00ecnh lu\u1eadn ho\u1eb7c ch\u1ec9nh s\u1eeda b\u00e0i \u0111\u0103ng s\u1ebd x\u00f3a c\u00e1c ph\u1ea7n c\u1ee7a cache.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Thu_gom_rac\"><\/span>Thu gom r\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Th\u01b0 m\u1ee5c cache c\u1ee7a b\u1ea1n s\u1ebd \u0111\u1ea7y l\u00ean theo th\u1eddi gian, c\u00e1i s\u1ebd l\u1ea5y kh\u00f4ng gian tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n. N\u1ebfu kh\u00f4ng gian l\u00e0 gi\u1edbi h\u1ea1n ho\u1eb7c t\u1ed1n k\u00e9m chi ph\u00ed, ho\u1eb7c n\u1ebfu b\u1ea1n lo l\u1eafng r\u1eb1ng c\u00e1c trang cache tr\u00ean trang c\u1ee7a b\u1ea1n s\u1ebd qu\u00e1 c\u0169 th\u00ec thu gom r\u00e1c ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. Thu gom r\u00e1c x\u1ea3y ra th\u01b0\u1eddng xuy\u00ean v\u00e0 x\u00f3a c\u00e1c file c\u0169 trong th\u01b0 m\u1ee5c cache. Trong ph\u1ea7n c\u00e0i \u0111\u1eb7t n\u00e2ng cao (advanced settings) b\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u1ecbnh:<\/p>\n<ol>\n<li>Cache timeout (th\u1eddi gian h\u1ebft h\u1ea1n c\u1ee7a cache). Bao l\u00e2u th\u00ec file cache \u0111\u01b0\u1ee3c xem x\u00e9t l\u00e0m m\u1edbi l\u1ea1i. Sau th\u1eddi gian n\u00e0y ch\u00fang \u0111\u01b0\u1ee3c xem l\u00e0 qu\u00e1 c\u0169 v\u00e0 c\u00f3 th\u1ec3 b\u1ecb x\u00f3a.<\/li>\n<li>Scheduler (l\u00ean l\u1ecbch). C\u00e0i \u0111\u1eb7t m\u1ee9c \u0111\u1ed9 th\u01b0\u1eddng xuy\u00ean tr\u00ecnh thu gom r\u00e1c n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n.<\/li>\n<li>Notification emails (th\u00f4ng b\u00e1o qua email). B\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00f4ng b\u00e1o v\u1ec1 ti\u1ebfn tr\u00ecnh thu gom r\u00e1c. Kh\u00f4ng c\u00f3 thi\u1ebft l\u1eadp \u0111\u00fang sai cho vi\u1ec7c thu gom r\u00e1c. N\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o trang c\u1ee7a b\u1ea1n.<\/li>\n<\/ol>\n<p>N\u1ebfu trang c\u1ee7a b\u1ea1n c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean, ho\u1eb7c hay c\u00f3 b\u00ecnh lu\u1eadn h\u00e3y thi\u1ebft l\u1eadp timeout l\u00e0 1800 gi\u00e2y v\u00e0 thi\u1ebft l\u1eadp timer l\u00e0 600 gi\u00e2y.<\/p>\n<p>N\u1ebfu trang c\u1ee7a b\u1ea1n \u00edt khi c\u00f3 thay \u0111\u1ed5i (mostly static) b\u1ea1n c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a ch\u1ee9c n\u0103ng thu gom r\u00e1c b\u1eb1ng c\u00e1ch nh\u1eadp 0 v\u00e0o ph\u1ea7n timeout, ho\u1eb7c s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb timeout r\u1ea5t l\u1edbn.<\/p>\n<p>Th\u01b0 m\u1ee5c cache, th\u01b0\u1eddng l\u00e0 wp-content\/cache\/ ch\u1ec9 l\u00e0 n\u01a1i ch\u1ee9a c\u00e1c file t\u1ea1m th\u1eddi. \u0110\u1eebng bao gi\u1edd \u0111\u01b0a c\u00e1c file quan tr\u1ecdng ho\u1eb7c th\u01b0 m\u1ee5c quan tr\u1ecdng trong th\u01b0 m\u1ee5c n\u00e0y. Ch\u00fang s\u1ebd b\u1ecb x\u00f3a n\u1ebfu plugin c\u00f3 quy\u1ec1n truy c\u1eadp ghi v\u00e0o ch\u00fang.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CDN\"><\/span>CDN<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Delivery Network &#8211; CDN) th\u01b0\u1eddng l\u00e0 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi c\u00e1c m\u00e1y t\u00ednh n\u1eb1m \u1edf kh\u1eafp n\u01a1i tr\u00ean th\u1ebf gi\u1edbi s\u1ebd ph\u1ee5c v\u1ee5 n\u1ed9i dung trang web c\u1ee7a b\u1ea1n nhanh h\u01a1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 \u1edf g\u1ea7n b\u1ea1n nh\u1ea5t. C\u00e1c file t\u0129nh nh\u01b0 h\u00ecnh \u1ea3nh, JavaScript v\u00e0 CSS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 th\u00f4ng qua c\u00e1c m\u1ea1ng l\u01b0\u1edbi n\u00e0y \u0111\u1ec3 t\u0103ng t\u1ed1c kh\u1ea3 n\u0103ng t\u1ea3i trang c\u1ee7a b\u1ea1n. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o m\u1ed9t &#8220;CDN c\u1ee7a ng\u01b0\u1eddi ngh\u00e8o&#8221; b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng sub domain c\u1ee7a t\u00ean mi\u1ec1n ch\u00ednh \u0111\u1ec3 ph\u1ee5c v\u1ee5 c\u00e1c file t\u0129nh.<\/p>\n<p><a href=\"https:\/\/wordpress.org\/plugins\/ossdl-cdn-off-linker\/\">OSSDL CDN off-linker<\/a>\u00a0\u0111\u00e3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o WP Super Cache \u0111\u1ec3 cung c\u1ea5p c\u00e1c h\u1ed7 tr\u1ee3 CDN c\u01a1 b\u1ea3n. N\u00f3 l\u00e0m vi\u1ec7c b\u1eb1ng c\u00e1ch rewriting (vi\u1ebft l\u1ea1i) URL c\u1ee7a c\u00e1c file (ngo\u1ea1i tr\u1eeb file .php) trong wp-content v\u00e0 wp-includes trong m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n v\u00ec th\u1ebf m\u00e0 ch\u00fang tr\u1ecf v\u1ec1 \u0111\u01b0\u1ee3c hostname kh\u00e1c. Nhi\u1ec1u CDN h\u1ed7 tr\u1ee3 &#8220;origin pull&#8221;. \u0110i\u1ec1u n\u00e0y ngh\u0129a l\u00e0 CDN s\u1ebd t\u1ea3i file t\u1ef1 \u0111\u1ed9ng t\u1eeb m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n khi n\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u1ea7u ti\u00ean, v\u00e0 s\u1ebd ti\u1ebfp t\u1ee5c ph\u1ee5c v\u1ee5 n\u00f3 trong kho\u1ea3ng th\u1eddi gian \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh tr\u01b0\u1edbc khi t\u1ea3i l\u1ea1i n\u00f3 l\u1ea7n n\u1eefa t\u1eeb m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n.<\/p>\n<p>Tinh ch\u1ec9nh c\u1ea5u h\u00ecnh n\u00e0y tr\u00ean tab &#8220;CDN&#8221; c\u1ee7a trang c\u00e0i \u0111\u1eb7t plugin. \u0110\u00e2y l\u00e0 k\u1ef9 thu\u1eadt n\u00e2ng cao v\u00e0 y\u00eau c\u1ea7u hi\u1ec3u bi\u1ebft c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch m\u00e1y ch\u1ee7 ho\u1eb7c CDN ho\u1ea1t \u0111\u1ed9ng. H\u00e3y \u0111\u1ea3m b\u1ea3o l\u00e0 b\u1ea1n x\u00f3a b\u1ecf file cache sau khi b\u1ea1n tinh ch\u1ec9nh CDN.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tuy_chinh_caching\"><\/span>T\u00f9y ch\u1ec9nh caching<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Gi\u1edd b\u1ea1n c\u00f3 kh\u1ea3 n\u0103ng tham gia (hook) v\u00e0o qu\u00e1 tr\u00ecnh caching b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng h\u00e0m add_cacheaction().<\/p>\n<p>C\u00f3 3 &#8220;hook&#8221; c\u00f3 s\u1eb5n:<\/p>\n<ol>\n<li>&#8220;wp_cache_get_cookies_values&#8221; &#8211; ch\u1ec9nh s\u1eeda kh\u00f3a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi WP Cache.<\/li>\n<li>&#8220;add_cacheaction&#8221; &#8211; ch\u1ea1y trong phase2. Cho ph\u00e9p plugin th\u00eam WordPress hook v\u00e0o.<\/li>\n<li>&#8220;cache_admin_page&#8221; &#8211; ch\u1ea1y trong trang admin. S\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 ch\u1ec9nh s\u1eeda trang \u0111\u00f3, c\u00f3 th\u1ec3 b\u1eb1ng c\u00e1ch th\u00eam c\u00e1c t\u00f9y ch\u1ecdn c\u1ea5u h\u00ecnh m\u1edbi.<\/li>\n<\/ol>\n<p>C\u0169ng c\u00f3 m\u1ed9t b\u1ed9 l\u1ecdc WordPress th\u00f4ng th\u01b0\u1eddng. S\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc &#8220;do_createsupercache&#8221; \u0111\u1ec3 t\u00f9y ch\u1ec9nh c\u00e1c ki\u1ec3m tra tr\u01b0\u1edbc khi t\u1ea1o cache. B\u1ed9 l\u1ecdc cho ph\u00e9p m\u1ed9t tham s\u1ed1. \u0110\u1ea7u ra c\u1ee7a h\u00e0m wp_cache_get_cookies_values() c\u1ee7a WP-Cache.<\/p>\n<p>Xem plugins\/searchengine.php nh\u01b0 m\u1ed9t v\u00ed d\u1ee5 t\u00f4i s\u1eed d\u1ee5ng cho plugin c\u1ee7a t\u00f4i <a href=\"https:\/\/odd.blog\/no-adverts-for-friends\/\">No Advers for Friends<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sua_cac_loi_co_the_xay_ra\"><\/span>S\u1eeda c\u00e1c l\u1ed7i c\u00f3 th\u1ec3 x\u1ea3y ra<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>N\u1ebfu c\u00f3 \u0111i\u1ec1u g\u00ec \u0111\u1ea5y kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng khi b\u1ea1n c\u00e0i plugin, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00e0i th\u1ee9 c\u1ea7n ki\u1ec3m tra:<\/p>\n<ol>\n<li>wp-content c\u00f3 kh\u1ea3 n\u0103ng ghi b\u1edfi web server (m\u00e1y ch\u1ee7 web)?<\/li>\n<li>File wp-content\/wp-cache-config.php c\u00f3 t\u1ed3n t\u1ea1i kh\u00f4ng? N\u1ebfu kh\u00f4ng, copy file wp-super-cache\/wp-cache-config-sample.php th\u00e0nh wp-content\/wp-cache-config.php v\u00e0 \u0111\u1ea3m b\u1ea3o WPCACHEHOME tr\u1ecf \u0111\u1ebfn \u0111\u00fang v\u1ecb tr\u00ed.<\/li>\n<li>File wp-content\/advanced-cache.php c\u00f3 kh\u00f4ng? N\u1ebfu kh\u00f4ng, th\u00ec b\u1ea1n ph\u1ea3i copy wp-super-cache\/advanced-cache.php v\u00e0o wp-content\/. B\u1ea1n ph\u1ea3i ch\u1ec9nh s\u1eeda file v\u00e0 thay \u0111\u1ed5i \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ec3 n\u00f3 tr\u1ecf v\u00e0o th\u01b0 m\u1ee5c wp-super-cache.<\/li>\n<li>N\u1ebfu trang kh\u00f4ng \u0111\u01b0\u1ee3c cache m\u1ed9t ch\u00fat n\u00e0o, lo\u1ea1i b\u1ecf wp-content\/advanced-cache.php v\u00e0 t\u1ea1o l\u1ea1i n\u00f3, l\u00e0m theo c\u00e1c h\u01b0\u1edbng d\u1eabn \u1edf tr\u00ean.<\/li>\n<li>H\u00e3y \u0111\u1ea3m b\u1ea3o l\u00e0 d\u00f2ng b\u00f4i \u0111\u1eadm d\u01b0\u1edbi \u0111\u00e2y trong wp-config.php v\u00e0 n\u00f3 N\u1eb0M TR\u00caN d\u00f2ng &#8220;require_once(ABSPATH.&#8217;wp0settings.php&#8217;)&#8221;:\u00a0<strong>define( &#8216;WP_CACHE&#8217;, true );<\/strong><\/li>\n<li>Th\u1eed Settings-&gt;WP Super Cache l\u1ea7n n\u1eefa v\u00e0 b\u1eadt cache.<\/li>\n<li>Nh\u00ecn v\u00e0o wp-content\/cache\/supercache\/. C\u00f3 c\u00e1c th\u01b0 m\u1ee5c v\u00e0 c\u00e1c file \u1edf \u0111\u00f3 kh\u00f4ng?<\/li>\n<li>C\u00f3 \u0111i\u1ec1u g\u00ec trong file php error_log?<\/li>\n<li>N\u1ebfu tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n v\u1eabn y\u00eau c\u1ea7u b\u1ea1n l\u01b0u file sau khi super cache \u0111\u01b0\u1ee3c c\u00e0i b\u1ea1n ph\u1ea3i v\u00f4 hi\u1ec7u h\u00f3a tr\u00ecnh n\u00e9n c\u1ee7a Super Cache. V\u00e0o Settings-&gt;trang WP Super Cache v\u00e0 v\u00f4 hi\u1ec7u n\u00f3 \u1edf \u0111\u00e2y.<\/li>\n<li>Plugin kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t khi ch\u1ebf \u0111\u1ed9 PHP safe mode \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. N\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c v\u00f4 hi\u1ec7u h\u00f3a b\u1edfi qu\u1ea3n tr\u1ecb vi\u00ean c\u1ee7a b\u1ea1n.<\/li>\n<li>N\u1ebfu trang c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c cache r\u1ea5t ng\u1eabu nhi\u00ean v\u00e0 \u0111\u00f4i khi kh\u00f4ng \u0111\u01b0\u1ee3c cache, blog c\u1ee7a b\u1ea1n c\u00f3 l\u1ebd \u0111\u01b0\u1ee3c xem \u0111\u1ed3ng th\u1eddi v\u1edbi c\u1ea3 ti\u1ec1n t\u1ed1 c\u00f3 &#8220;www&#8221; v\u00e0 kh\u00f4ng &#8220;www&#8221; trong URL. B\u1ea1n c\u1ea7n ph\u1ea3i ch\u1ecdn m\u1ed9t v\u00e0 c\u00e0i \u0111\u1eb7t plugin <a href=\"http:\/\/txfx.net\/code\/wordpress\/enforce-www-preference\/\">Enforce www prefernce<\/a> n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng b\u1ea3n c\u00e0i \u0111\u1eb7t WordPress c\u0169. Phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t t\u1ef1 n\u00f3 chuy\u1ec3n h\u01b0\u1edbng (d\u00f9 g\u00ec, b\u1ea1n v\u1eabn n\u00ean ch\u1ea1y phi\u00ean b\u1ea3n WordPress m\u1edbi nh\u1ea5t).<\/li>\n<li>Ng\u01b0\u1eddi d\u00f9ng server ri\u00eang t\u1ea1i Dreamhost ph\u1ea3i ch\u1ec9nh s\u1eeda file wp-content\/wp-cache-config.php v\u00e0 thi\u1ebft l\u1eadp th\u01b0 m\u1ee5c cache t\u1edbi &#8220;\/tmp&#8221; n\u1ebfu h\u1ecd g\u1eb7p l\u1ed7i v\u1ec1 vi\u1ec7c t\u0103ng s\u1eed d\u1ee5ng CPU.<\/li>\n<li>L\u1ed7i kh\u00f3a t\u00eap nh\u01b0 &#8220;failed to acquire key 0x152b: Permission denied in\u2026\/kh\u00f4ng th\u1ec3 l\u1ea5y kh\u00f3a 0x152b: Quy\u1ec1n b\u1ecb t\u1eeb ch\u1ed1i trong&#8230;&#8221; ho\u1eb7c &#8220;Page not cached by WP Super Cache. Could not get mutex lock.\/Trang kh\u00f4ng \u0111\u01b0\u1ee3c cache b\u1edfi WP Super Cache. Kh\u00f4ng th\u1ec3 kh\u00f3a mutex.&#8221; l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y b\u1ea1n c\u00f3 s\u1eed d\u1ee5ng kh\u00f3a t\u1ec7p\/file locking. Ch\u1ec9nh s\u1eeda wp-content\/wp-cache-config.php v\u00e0 b\u1ecf ghi ch\u00fa &#8220;$use_flock = true&#8221; ho\u1eb7c thi\u1ebft l\u1eadp $sem_id sang m\u1ed9t gi\u00e1 tr\u1ecb kh\u00e1c. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a kh\u00f3a t\u1ec7p t\u1eeb m\u00e0n h\u00ecnh Admin nh\u01b0 l\u00e0 gi\u1ea3i ph\u00e1p cu\u1ed1i c\u00f9ng.<\/li>\n<li>\u0110\u1ea3m b\u1ea3o l\u00e0 cache\/wp_cache_mutex.lock c\u00f3 kh\u1ea3 n\u0103ng ghi b\u1edfi web server n\u1ebfu s\u1eed d\u1ee5ng kh\u00f3a file th\u00f4.<\/li>\n<li>Th\u01b0 m\u1ee5c cache kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t trong chia s\u1ebb NFS ho\u1eb7c Samba ho\u1eb7c NAS. N\u00f3 ph\u1ea3i n\u1eb1m tr\u00ean m\u1ed9t \u0111\u0129a c\u1ee5c b\u1ed9. Kh\u00f3a t\u1ec7p v\u00e0 x\u00f3a t\u1ec7p qu\u00e1 h\u1ea1n kh\u00f4ng l\u00e0m vi\u1ec7c ch\u00ednh x\u00e1c tr\u1eeb khi th\u01b0 m\u1ee5c cache n\u1eb1m tr\u00ean m\u00e1y c\u1ee5c b\u1ed9.<\/li>\n<li>Tr\u00ecnh d\u1ecdn d\u1eb9p r\u00e1c c\u00e1c file c\u0169 kh\u00f4ng th\u1ec3 l\u00e0m vi\u1ec7c n\u1ebfu WordPress kh\u00f4ng t\u00ecm th\u1ea5y wp-cron.php. N\u1ebfu hostname c\u1ee7a b\u1ea1n tr\u1ecf v\u1ec1 127.0.0.1 n\u00f3 c\u00f3 th\u1ec3 ng\u0103n kh\u00f4ng cho tr\u00ecnh thu d\u1ecdn r\u00e1c l\u00e0m vi\u1ec7c. Ki\u1ec3m tra access_logs cho m\u1ee5c wp-cron.php. C\u00f3 ph\u1ea3i ch\u00fang tr\u1ea3 v\u1ec1 m\u00e3 404 (kh\u00f4ng t\u00ecm th\u1ea5y file) ho\u1eb7c 200? N\u1ebfu n\u00f3 l\u00e0 404 ho\u1eb7c b\u1ea1n kh\u00f4ng th\u1ea5y wp-cron.php \u1edf b\u1ea5t c\u1ee9 \u0111\u00e2u, WordPress c\u00f3 th\u1ec3 t\u00ecm ki\u1ebfm \u0111o\u1ea1n m\u00e3 \u0111\u00f3 sai v\u1ecb tr\u00ed. B\u1ea1n ph\u1ea3i n\u00f3i v\u1edbi qu\u1ea3n tr\u1ecb vi\u00ean server \u0111\u1ec3 ch\u1ec9nh s\u1eeda \u0111i\u1ec1u n\u00e0y ho\u1eb7c s\u1eeda l\u1ea1i tr\u00ean server Unix v\u00e0 lo\u1ea1i b\u1ecf d\u00f2ng sau. Hostname c\u1ee7a b\u1ea1n ph\u1ea3i tr\u1ecf v\u1ec3 \u0111\u1ecba ch\u1ec9 IP b\u00ean ngo\u00e0i kh\u00e1c v\u1edbi m\u00e1y ch\u1ee7 tr\u00ean m\u1ea1ng\/Internet s\u1eed d\u1ee5ng. Xem th\u00eam b\u00e0i vi\u1ebft\u00a0https:\/\/yoast.com\/wp-cron-issues\/ \u0111\u1ec3 bi\u1ebft th\u00eam chi ti\u1ebft. M\u1ed9t d\u00f2ng ki\u1ec3u &#8220;127.0.0.1 localhost localhost.localdomain&#8221; l\u00e0 OK<\/li>\n<li>N\u1ebfu c\u00e1c trang c\u0169 \u0111\u01b0\u1ee3c \u0111\u01b0a ra cho ng\u01b0\u1eddi truy c\u1eadp th\u00f4ng qua supercache, b\u1ea1n c\u00f3 th\u1ec3 b\u1ecb m\u1ea5t modules Apache (ho\u1eb7c nh\u1eefng c\u00e1i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi n\u00f3 n\u1ebfu b\u1ea1n kh\u00f4ng s\u1eed d\u1ee5ng Apache). 3 module sau l\u00e0 c\u1ea7n thi\u1ebft: mod_mime, mod_headers v\u00e0 mod_expires.Hai c\u00e1i cu\u1ed1i c\u00f9ng \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tr\u00ecnh duy\u1ec7t t\u1ea3i phi\u00ean b\u1ea3n m\u1edbi c\u1ee7a c\u00e1c trang \u0111ang t\u1ed3n t\u1ea1i tr\u00ean trang.<\/li>\n<li>Th\u00f4ng b\u00e1o l\u1ed7i, &#8220;WP Super Cache is installed but broken. The path to wp-cache-phase1.php in wp-content\/advanced-cache.php must be fixed!\/WP Super Cache \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i nh\u01b0ng g\u1eb7p v\u1ea5n \u0111\u1ec1. \u0110\u01b0\u1eddng d\u1eabn \u0111\u1ebfn wp-cache-phase1.php trong wp-content\/advanced-cache.php ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eeda l\u1ea1i!&#8221; xu\u1ea5t hi\u1ec7n t\u1ea1i v\u1ecb tr\u00ed cu\u1ed1i c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c trang. M\u1edf file\u00a0wp-content\/advanced-cache.php b\u1eb1ng tr\u00ecnh so\u1ea1n th\u1ea3o b\u1ea1n hay d\u00f9ng. \u0110\u01b0\u1eddng d\u1eabn t\u1edbi wp-cache-phase1.php c\u00f3 ch\u00ednh x\u00e1c kh\u00f4ng? FIle n\u00e0y b\u00ecnh th\u01b0\u1eddng s\u1ebd n\u1eb1m trong wp-content\/plugins\/wp-super-cache\/. N\u1ebfu n\u00f3 kh\u00f4ng ch\u00ednh x\u00e1c b\u1ed9 nh\u1edb \u0111\u1ec7m s\u1ebd kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c.<\/li>\n<li>Caching kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng. Nh\u00e3n th\u1eddi gian tr\u00ean blog c\u1ee7a t\u00f4i ti\u1ebfp t\u1ee5c thay \u0111\u1ed5i khi t\u00f4i reload (t\u1ea3i l\u1ea1i trang). Ki\u1ec3m tra \u0111\u01b0\u1eddng d\u1eabn trong c\u00e1c quy t\u1eafc b\u1ea1n thi\u1ebft l\u00e2p \u1edf .htaccess c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi th\u01b0 m\u1ee5c supercache. B\u1ea1n c\u00f3 th\u1ec3 ph\u1ea3i hardcode n\u00f3. Th\u1eed v\u00f4 hi\u1ec7u h\u00f3a ch\u1ebf \u0111\u1ed9 supercache.<\/li>\n<li>N\u1ebfu file cache c\u1ee7a supercache \u0111\u01b0\u1ee3c t\u1ea1o nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5, ki\u1ec3m tra quy\u1ec1n tr\u00ean t\u1ea5t c\u1ea3 th\u01b0 m\u1ee5c c\u1ee7a b\u1ea1n \u1edf wp-content\/cache\/supercache (v\u00e0 t\u1eebng cache c\u1ee7a wp-content v\u00e0 th\u01b0 m\u1ee5c supercache) v\u00e0 wp-content\/cache\/.htaccess. N\u1ebfu PHP c\u1ee7a b\u1ea1n ch\u1ea1y nh\u01b0 m\u1ed9t ng\u01b0\u1eddi d\u00f9ng kh\u00e1c v\u1edbi Apache v\u00e0 quy\u1ec1n h\u1ea1n l\u00e0 strict\/nghi\u00eam ng\u1eb7t, Apache c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ecdc \u0111\u01b0\u1ee3c c\u00e1c file cache t\u1ea1o b\u1edfi PHP. \u0110\u1ec3 ch\u1ec9nh s\u1eeda b\u1ea1n ph\u1ea3i th\u00eam c\u00e1c d\u00f2ng sau v\u00e0o file wp-config.php c\u1ee7a b\u1ea1n (V\u00e0 n\u00f3 n\u1eb1m tr\u00ean \u0111\u1ecbnh ngh\u0129a c\u1ee7a WP_CACHE). Sau \u0111\u00f3 x\u00f3a cache c\u1ee7a b\u1ea1n. umask( 0022 );<\/li>\n<li>N\u1ebfu b\u1ea1n nh\u00ecn th\u1ea5y file r\u00e1c trong tr\u00ecnh duy\u1ec7t sau khi b\u1eadt n\u00e9n trong plugin, n\u00e9n c\u00f3 th\u1ec3 \u0111\u00e3 \u0111\u01b0\u1ee3c b\u1eadt s\u1eb5n trong web server c\u1ee7a b\u1ea1n. Trong Apache b\u1ea1n ph\u1ea3i v\u00f4 hi\u1ec7u h\u00f3a mod_deflate, ho\u1eb7c trong PHP zlib compression c\u00f3 th\u1ec3 \u0111\u00e3 \u0111\u01b0\u1ee3c b\u1eadt. B\u1ea1n c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a theo ba c\u00e1ch. N\u1ebfu b\u1ea1n c\u00f3 quy\u1ec1n truy c\u1eadp g\u1ed1c (root access), h\u00e3y ch\u1ec9nh s\u1eeda php.ini v\u00e0 t\u00ecm \u0111\u1ebfn c\u00e1i \u0111\u1eb7t zlib.output_compression v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u00f3 &#8220;Off&#8221; ho\u1eb7c th\u00eam d\u00f2ng sau v\u00e0o .htaccess:\u00a0<em>php_flag zlib.output_compression off .\u00a0<\/em>N\u1ebfu \u0111i\u1ec1u \u0111\u00f3 v\u1eabn kh\u00f4ng c\u00f3 hi\u1ec7u qu\u1ea3, th\u00eam d\u00f2ng sau v\u00e0o wp-config.php:\u00a0<em>ini_set(&#8216;zlib.output_compression&#8217;, 0);<\/em><\/li>\n<li>&#8220;M\u00e0n h\u00ecnh tr\u1eafng ch\u1ebft ch\u00f3c&#8221; ho\u1eb7c m\u1ed9t trang tr\u1eafng khi b\u1ea1n gh\u00e9 th\u0103m trang web g\u1ea7n nh\u01b0 ch\u1eafc ch\u1eafn c\u00f3 nguy\u00ean nh\u00e2n t\u1eeb l\u1ed7i PHP nh\u01b0ng n\u00f3 c\u0169ng c\u00f3 th\u1ec3 c\u00f3 nguy\u00ean nh\u00e2n b\u1edbi APC. V\u00f4 hi\u1ec7u h\u00f3a ti\u1ec7n \u00edch m\u1edf r\u1ed9ng PHP n\u1ebfu b\u1ea1n g\u1eb7p v\u1ea5n \u0111\u1ec1 v\u00e0 thay th\u1ebf n\u00f3 b\u1eb1ng eAccelerator ho\u1eb7c Xcache.<\/li>\n<li>Sau khi g\u1ee1 c\u00e0i \u0111\u1eb7t, li\u00ean k\u1ebft t\u0129nh c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 b\u1ecb g\u00e3y n\u1ebfu b\u1ea1n c\u0169ng lo\u1ea1i b\u1ecf c\u00e1c quy t\u1eafc c\u1ee7a mod_rewrite. T\u1ea1o l\u1ea1i c\u00e1c quy t\u1eafc \u0111\u00f3 b\u1eb1ng c\u00e1ch v\u00e0o trang Settings-&gt;Permalink v\u00e0 l\u01b0u form m\u1ed9t l\u1ea7n n\u1eefa.<\/li>\n<li>N\u1ebfu trang c\u1ee7a b\u1ea1n t\u1eeb ch\u1ed1i t\u1ea3i, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng wp-config.php \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp ch\u00ednh x\u00e1c. B\u1ea1n c\u00f3 b\u1ecf qu\u00ean th\u1ebb \u0111\u00f3ng ho\u1eb7c m\u1edf PHP n\u00e0o kh\u00f4ng?<\/li>\n<li>Trang ch\u1ee7 c\u1ee7a b\u1ea1n th\u00ec \u1ed5n nh\u01b0ng c\u00e1c b\u00e0i post v\u00e0 page tr\u1ea3 v\u1ec1 k\u1ebft qu\u1ea3 404? V\u00e0o ph\u1ea7n Settings-&gt;permalinks v\u00e0 click &#8220;Save&#8221; khi b\u1ea1n \u0111\u00e3 l\u1ef1a ch\u1ecdn c\u1ea5u tr\u00fac \u0111\u01b0\u1eddng d\u1eabn t\u0129nh. B\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n c\u1eadp nh\u1eadt th\u1ee7 c\u00f4ng file .htaccess<\/li>\n<li>N\u1ebfu m\u1ed9t s\u1ed1 k\u00fd t\u1ef1 kh\u00f4ng hi\u1ec3n th\u1ecb ch\u00ednh x\u00e1c tr\u00ean trang web c\u1ee7a b\u1ea1n, m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh ch\u00ednh x\u00e1c. B\u1ea1n c\u1ea7n n\u00f3i cho ng\u01b0\u1eddi gh\u00e9 th\u0103m bi\u1ebft b\u1ed9 k\u00fd t\u1ef1 n\u00e0o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. V\u00e0o Setting-&gt;Reading v\u00e0 copy gi\u00e1 tr\u1ecb &#8220;M\u00e3 h\u00f3a cho trang v\u00e0 ngu\u1ed3n c\u1ea5p\/Encoding for pages and feeds&#8221;. Ch\u1ec9nh s\u1eeda file .htaccess v\u1edbi to\u00e0n b\u1ed9 Supercache c\u1ee7a b\u1ea1n v\u00e0 c\u00e1c quy t\u1eafc vi\u1ebft l\u1ea1i cho WordPress v\u00e0 th\u00eam n\u00f3 l\u00ean \u0111\u1ea7u, thay th\u1ebf CHARSET gi\u00e1 tr\u1ecb copy. (v\u00ed d\u1ee5, &#8216;UTF-8&#8217;):\u00a0AddDefaultCharset CHARSET<\/li>\n<li>S\u1eed d\u1ee5ng <a href=\"https:\/\/wordpress.org\/plugins\/cron-view\/\">Cron View<\/a> \u0111\u1ec3 gi\u00fap ch\u1ea9n \u0111o\u00e1n c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 thu d\u1ecdn r\u00e1c v\u00e0 t\u1ea3i tr\u01b0\u1edbc. S\u1eed d\u1ee5ng plugin \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00f4ng vi\u1ec7c \u0111\u01b0\u1ee3c l\u00ean l\u1ecbch v\u00e0 v\u00e0o th\u1eddi gian n\u00e0o. T\u00ecm ki\u1ebfm c\u00e1c hook wp_cache_gc v\u00e0 wp_cache_full_preload.<\/li>\n<li>Th\u00f4ng b\u00e1o l\u1ed7i &#8220;WP Super Cache \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t nh\u01b0ng b\u1ecb g\u00e3y. WPCACHEHOME ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong file wp-config.php v\u00e0 tr\u1ecf v\u1ec1 th\u01b0 m\u1ee5c c\u1ee7a plugin WP Super Cache&#8221; xu\u1ea5t hi\u1ec7n \u1edf cu\u1ed1i m\u1ed7i trang. B\u1ea1n c\u00f3 th\u1ec3 x\u00f3a wp-content\/advanced-cache.php v\u00e0 t\u1ea3i l\u1ea1i c\u00e1c thi\u1ebft l\u1eadp trang ho\u1eb7c ch\u1ec9nh s\u1eeda wp-config.php v\u00e0 t\u00ecm ki\u1ebfm WPCACHEHOME v\u00e0 \u0111\u1ea3m b\u1ea3o n\u00f3 tr\u1ecf v\u1ec1 th\u01b0 m\u1ee5c wp-super-cache. N\u00f3 th\u01b0\u1eddng l\u00e0 wp-content\/plugins\/wp-super-cache\/ nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 s\u1ebd c\u1ea7n \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 tr\u1ecf v\u1ec1 file (v\u00ec th\u1ebf s\u1ebd d\u1ec5 d\u00e0ng h\u01a1n cho trang setting s\u1eeda n\u00f3). N\u1ebfu n\u00f3 kh\u00f4ng ch\u00ednh x\u00e1c, b\u1ed9 nh\u1edb \u0111\u1ec7m s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ea3i.<\/li>\n<li>N\u1ebfu m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n g\u1eb7p v\u1ea5n \u0111\u1ec1 do s\u1ed1 l\u01b0\u1ee3ng semaphores s\u1eed d\u1ee5ng b\u1edfi plugin th\u00ec c\u00e1i \u0111\u00f3 c\u00f3 nguy\u00ean nh\u00e2n t\u1eeb vi\u1ec7c ng\u01b0\u1eddi d\u00f9ng c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng file locking (kh\u00f3a t\u1ec7p tin) c\u00e1i kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch (nh\u01b0ng ch\u1ec9 c\u1ea7n thi\u1ebft cho m\u1ed9t s\u1ed1 nh\u1ecf ng\u01b0\u1eddi d\u00f9ng). B\u1ea1n c\u00f3 th\u1ec3 v\u00f4 hi\u00eau h\u00f3a to\u00e0n b\u1ed9 file locking b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh h\u1eb1ng s\u1ed1 WPSC_DISABLE_LOCKING, ho\u1eb7c x\u00e1c \u0111\u1ecbnh h\u1eb1ng s\u1ed1 WPSC_REMOVE_SEMAPHORE v\u00ec th\u1ebf sem_remove() \u0111\u01b0\u1ee3c g\u1ecdi sau khi t\u1eebng trang \u0111\u01b0\u1ee3c cache nh\u01b0ng d\u01b0\u1eddng nh\u01b0 g\u00e2y ra v\u1ea5n \u0111\u1ec1 cho c\u00e1c y\u00eau c\u1ea7u x\u1eed l\u00fd kh\u00e1c gi\u1ed1ng v\u1edbi semaphore. T\u1ed1t nh\u1ea5t l\u00e0 v\u00f4 hi\u1ec7u h\u00f3a n\u00f3.<\/li>\n<li>Thi\u1ebft l\u1eadp bi\u1ebfn $htaccess_path trong wp-config.php ho\u1eb7c wp-cache-config.php t\u1edbi \u0111\u01b0\u1eddng d\u1eabn to\u00e0n c\u1ee5c c\u1ee7a .htaccess n\u1ebfu plugin t\u00ecm file n\u00e0y trong th\u01b0 m\u1ee5c kh\u00f4ng ch\u00ednh x\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra n\u1ebfu b\u1ea1n c\u00e0i \u0111\u1eb7t WordPress theo c\u00e1ch kh\u00f4ng b\u00ecnh th\u01b0\u1eddng.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Plugin WP Super Cache t\u1ea1o file html t\u0129nh t\u1eeb blog WordPress \u0111\u1ed9ng. Sau khi file html \u0111\u01b0\u1ee3c t\u1ea1o, m\u00e1y ch\u1ee7 web s\u1ebd s\u1eed d\u1ee5ng file \u0111\u00f3 thay v\u00ec x\u1eed l\u00fd c\u00e1c \u0111o\u1ea1n m\u00e3 PHP (c\u1ee7a WordPress) n\u1eb7ng v\u00e0 t\u1ed1n k\u00e9m h\u01a1n. C\u00e1c file html t\u0129nh s\u1ebd \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 cho \u0111a s\u1ed1 ng\u01b0\u1eddi d\u00f9ng: Nh\u1eefng &hellip;<\/p>\n","protected":false},"author":1,"featured_media":9872,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[97],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>M\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 WP Super Cache &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/faq-wp-super-cache\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 WP Super Cache &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"Plugin WP Super Cache t\u1ea1o file html t\u0129nh t\u1eeb blog WordPress \u0111\u1ed9ng. 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