{"id":3595,"date":"2026-10-27T09:30:00","date_gmt":"2026-10-27T09:30:00","guid":{"rendered":"https:\/\/potenting.com\/cs\/blog\/what-is-caching-how-it-works-and-why-it-matters\/"},"modified":"2026-10-27T09:53:38","modified_gmt":"2026-10-27T09:53:38","slug":"what-is-caching-how-it-works-and-why-it-matters-cs","status":"publish","type":"post","link":"https:\/\/potenting.com\/cs\/blog\/what-is-caching-how-it-works-and-why-it-matters\/","title":{"rendered":"Co je cachov\u00e1n\u00ed? Jak funguje a pro\u010d je d\u016fle\u017eit\u00e9"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3595\" class=\"elementor elementor-3595\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ef0e68 e-flex e-con-boxed e-con e-parent\" data-id=\"9ef0e68\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d5c5c70 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"d5c5c70\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;Na t\\u00e9to str\\u00e1nce nebyly nalezeny \\u017e\\u00e1dn\\u00e9 nadpisy.&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<div class=\"elementor-toc__header-title\">\n\t\t\t\tObsah\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__d5c5c70\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__d5c5c70\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__d5c5c70\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-917074d e-flex e-con-boxed e-con e-parent\" data-id=\"917074d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-21f2763 elementor-widget elementor-widget-text-editor\" data-id=\"21f2763\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>P\u0159edstavte si, \u017ee by web musel p\u0159i ka\u017ed\u00e9 va\u0161\u00ed n\u00e1v\u0161t\u011bv\u011b zpracov\u00e1vat v\u0161echna data od za\u010d\u00e1tku, aby na\u010detl obr\u00e1zky, zobrazil str\u00e1nky nebo z\u00edskal informace. To by nejen prodlou\u017eilo dobu odezvy, ale tak\u00e9 by to d\u00e1le zat\u011b\u017eovalo server a syst\u00e9mov\u00e9 prost\u0159edky. Pr\u00e1v\u011b zde p\u0159ich\u00e1z\u00ed na \u0159adu cachov\u00e1n\u00ed. D\u00edky ukl\u00e1d\u00e1n\u00ed \u010dasto pou\u017e\u00edvan\u00fdch dat do rychlej\u0161\u00ed pam\u011bti m\u016f\u017ee cachov\u00e1n\u00ed zkr\u00e1tit dobu p\u0159\u00edstupu k dat\u016fm a zv\u00fd\u0161it v\u00fdkon syst\u00e9mu. Jak ale cachov\u00e1n\u00ed funguje, jak\u00e9 typy cachov\u00e1n\u00ed existuj\u00ed a jak\u00e1 \u00faskal\u00ed mohou p\u0159i jeho pou\u017e\u00edv\u00e1n\u00ed nastat?<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3cda91c e-flex e-con-boxed e-con e-parent\" data-id=\"3cda91c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-641c43c elementor-widget elementor-widget-text-editor\" data-id=\"641c43c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Co je cachov\u00e1n\u00ed?<\/h2><p>Cachov\u00e1n\u00ed je proces ukl\u00e1d\u00e1n\u00ed \u010dasto pou\u017e\u00edvan\u00fdch dat do ur\u010dit\u00e9 pam\u011bti. P\u0159edstavte si, \u017ee pot\u0159ebujete ka\u017ed\u00fdch p\u00e1r minut p\u0159istupovat ke konkr\u00e9tn\u00ed aplikaci nebo dat\u016fm. Proto\u017ee se k t\u011bmto dat\u016fm p\u0159istupuje \u010dasto, ukl\u00e1daj\u00ed se do m\u00edsta zvan\u00e9ho mezipam\u011b\u0165 (cache), aby je nebylo nutn\u00e9 na\u010d\u00edtat znovu p\u0159i ka\u017ed\u00e9m pou\u017eit\u00ed. D\u016fvod\u016f pro pou\u017e\u00edv\u00e1n\u00ed cachov\u00e1n\u00ed je mnoho, jedn\u00edm z nejd\u016fle\u017eit\u011bj\u0161\u00edch je v\u0161ak zkr\u00e1cen\u00ed doby p\u0159\u00edstupu k dat\u016fm.<\/p><p>Pevn\u00e9 disky jsou pomal\u00e9 a ani ty nejrychlej\u0161\u00ed nedok\u00e1\u017eou dos\u00e1hnout rychlosti RAM a procesoru. Na\u010d\u00edt\u00e1n\u00ed dat z nich proto zabere \u010das. Mezipam\u011b\u0165 je v\u0161ak jin\u00e1, proto\u017ee jde o typ vysokorychlostn\u00ed pam\u011bti. Tento typ pam\u011bti m\u00e1 omezenou kapacitu a dok\u00e1\u017ee uchov\u00e1vat pouze \u010dasto pou\u017e\u00edvan\u00e1 data.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-35dac7d e-flex e-con-boxed e-con e-parent\" data-id=\"35dac7d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6af3baa elementor-widget elementor-widget-text-editor\" data-id=\"6af3baa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Typy cachov\u00e1n\u00ed<\/h2><p>V t\u00e9to \u010d\u00e1sti si p\u0159edstav\u00edme r\u016fzn\u00e9 typy cachov\u00e1n\u00ed a jejich vyu\u017eit\u00ed.<\/p><ul><li><h3>Cachov\u00e1n\u00ed na stran\u011b klienta<\/h3>P\u0159i t\u00e9to metod\u011b se data ukl\u00e1daj\u00ed na stran\u011b klienta, obvykle ve webov\u00e9m prohl\u00ed\u017ee\u010di. Prohl\u00ed\u017ee\u010d si m\u016f\u017ee do sv\u00e9 mezipam\u011bti ulo\u017eit kopie webov\u00fdch str\u00e1nek a prost\u0159edk\u016f, jako jsou obr\u00e1zky, aby je mohl p\u0159i dal\u0161\u00edch n\u00e1v\u0161t\u011bv\u00e1ch zobrazit bez op\u011btovn\u00e9ho na\u010d\u00edt\u00e1n\u00ed ze serveru. Prohl\u00ed\u017ee\u010d nap\u0159\u00edklad dok\u00e1\u017ee podle data posledn\u00ed zm\u011bny str\u00e1nky ur\u010dit, zda je verze ulo\u017een\u00e1 v mezipam\u011bti st\u00e1le platn\u00e1.<\/li><li><h3>Cachov\u00e1n\u00ed na stran\u011b serveru<\/h3>P\u0159i t\u00e9to metod\u011b se data ukl\u00e1daj\u00ed na stran\u011b serveru, aby bylo mo\u017en\u00e9 rychleji odpov\u00eddat na po\u017eadavky a sn\u00ed\u017eit z\u00e1t\u011b\u017e serveru i s\u00edt\u011b. P\u0159\u00edkladem je pou\u017eit\u00ed cachovac\u00edho proxy serveru, kter\u00fd dok\u00e1\u017ee ukl\u00e1dat po\u017eadovan\u00fd obsah a v p\u0159\u00edpad\u011b pot\u0159eby jej poskytovat i dal\u0161\u00edm u\u017eivatel\u016fm. Dal\u0161\u00edm p\u0159\u00edkladem mechanismu cachov\u00e1n\u00ed na stran\u011b serveru je DynaCache v IBM WebSphere Application Server.<\/li><li><h3>Cachov\u00e1n\u00ed cel\u00fdch str\u00e1nek<\/h3>P\u0159i t\u00e9to metod\u011b se ukl\u00e1d\u00e1 kopie cel\u00e9 vykreslen\u00e9 webov\u00e9 str\u00e1nky, tak\u017ee ji lze p\u0159i dal\u0161\u00edch po\u017eadavc\u00edch doru\u010dit, ani\u017e by bylo nutn\u00e9 znovu spou\u0161t\u011bt v\u0161echny procesy generov\u00e1n\u00ed obsahu. Tato metoda je v\u0161ak vhodn\u00e1 pouze tehdy, kdy\u017e lze obsah str\u00e1nky cachovat a jeho zm\u011bny jsou spr\u00e1vn\u011b \u0159\u00edzeny.<\/li><li><h3>Cachov\u00e1n\u00ed fragment\u016f<\/h3>P\u0159i t\u00e9to metod\u011b se m\u00edsto cel\u00e9 str\u00e1nky ukl\u00e1daj\u00ed do mezipam\u011bti nez\u00e1visle na sob\u011b jej\u00ed jednotliv\u00e9 \u010d\u00e1sti. Tento p\u0159\u00edstup se hod\u00ed, pokud str\u00e1nka obsahuje statick\u00fd i dynamick\u00fd obsah. Cachov\u00e1n\u00edm \u010d\u00e1st\u00ed, kter\u00e9 ulo\u017eit lze, je mo\u017en\u00e9 zlep\u0161it v\u00fdkon str\u00e1nky, ani\u017e by bylo nutn\u00e9 cachovat celou str\u00e1nku jako jeden celek.<\/li><li><h3>Cachov\u00e1n\u00ed statick\u00e9ho obsahu<\/h3>Tato metoda slou\u017e\u00ed k ukl\u00e1d\u00e1n\u00ed obsahu, kter\u00fd se m\u011bn\u00ed jen z\u0159\u00eddka, nap\u0159\u00edklad grafick\u00fdch obr\u00e1zk\u016f a textov\u00fdch soubor\u016f. Proto\u017ee tento obsah obvykle nevy\u017eaduje \u010dast\u00e9 aktualizace, ulo\u017een\u00ed jeho kopie do mezipam\u011bti m\u016f\u017ee sn\u00ed\u017eit po\u010det po\u017eadavk\u016f na zdrojov\u00fd server a zkr\u00e1tit dobu na\u010d\u00edt\u00e1n\u00ed str\u00e1nek.<\/li><li><h3>Cachov\u00e1n\u00ed dynamick\u00e9ho obsahu<\/h3>P\u0159i t\u00e9to metod\u011b se do mezipam\u011bti ukl\u00e1d\u00e1 obsah, kter\u00fd se m\u016f\u017ee \u010dasto m\u011bnit nebo kter\u00fd se generuje na z\u00e1klad\u011b informac\u00ed o u\u017eivateli a dal\u0161\u00edch podm\u00ednek. Proto\u017ee dynamick\u00fd obsah m\u016f\u017ee b\u00fdt personalizovan\u00fd, je obzvl\u00e1\u0161\u0165 d\u016fle\u017eit\u00e9 spravovat platnost mezipam\u011bti a ur\u010dovat, kdy je t\u0159eba ji aktualizovat. P\u0159\u00edkladem \u0159e\u0161en\u00ed pro cachov\u00e1n\u00ed dynamick\u00e9ho obsahu je DynaCache v IBM WebSphere Application Server.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e10552c elementor-widget elementor-widget-image\" data-id=\"e10552c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"708\" src=\"https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/10\/Types-of-Caching.webp\" class=\"attachment-large size-large wp-image-3497\" alt=\"Types of Caching\" srcset=\"https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/10\/Types-of-Caching.webp 800w, https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/10\/Types-of-Caching-300x266.webp 300w, https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/10\/Types-of-Caching-768x680.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-137bc46 e-flex e-con-boxed e-con e-parent\" data-id=\"137bc46\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5777338 elementor-widget elementor-widget-text-editor\" data-id=\"5777338\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Pro\u010d byste m\u011bli pou\u017e\u00edvat cachov\u00e1n\u00ed?<\/h2><p>Jak bylo zm\u00edn\u011bno v\u00fd\u0161e, jedn\u00edm z d\u016fvod\u016f pro pou\u017e\u00edv\u00e1n\u00ed cachov\u00e1n\u00ed je zrychlen\u00ed p\u0159\u00edstupu k \u010dasto pou\u017e\u00edvan\u00fdm dat\u016fm. Cachov\u00e1n\u00ed nav\u00edc sni\u017euje v\u00fdpo\u010detn\u00ed z\u00e1t\u011b\u017e serveru. Ale pro\u010d?<\/p><p>Kdy\u017e syst\u00e9m \u010dasto pot\u0159ebuje ur\u010dit\u00e1 data a mus\u00ed je na\u010d\u00edtat z \u00falo\u017ei\u0161t\u011b, nejen\u017ee to trv\u00e1 d\u00e9le, ale z\u00e1rove\u0148 to vy\u017eaduje dal\u0161\u00ed zpracov\u00e1n\u00ed ze strany CPU a dal\u0161\u00edch syst\u00e9mov\u00fdch prost\u0159edk\u016f. Pokud jsou v\u0161ak tato data k dispozici v mezipam\u011bti, syst\u00e9m k nim m\u016f\u017ee p\u0159istoupit p\u0159\u00edmo tam, ani\u017e by musel znovu p\u0159istupovat k \u00falo\u017ei\u0161ti.<\/p><p>Cachov\u00e1n\u00ed p\u0159in\u00e1\u0161\u00ed i dal\u0161\u00ed v\u00fdhody, kter\u00e9 nejl\u00e9pe vysv\u011btl\u00ed p\u0159\u00edklad. P\u0159edpokl\u00e1dejme, \u017ee m\u00e1te 10 GB dat, kter\u00e1 je t\u0159eba ulo\u017eit. Proto\u017ee je procesor mnohem rychlej\u0161\u00ed ne\u017e \u00falo\u017en\u00fd syst\u00e9m, \u00falo\u017ei\u0161t\u011b nemus\u00ed b\u00fdt schopn\u00e9 tato data ukl\u00e1dat stejnou rychlost\u00ed. Pr\u00e1v\u011b zde p\u0159ich\u00e1z\u00ed na \u0159adu cachov\u00e1n\u00ed. Procesor ode\u0161le data do mezipam\u011bti, kter\u00e1 je pak p\u0159ed\u00e1v\u00e1 \u00falo\u017en\u00e9mu syst\u00e9mu p\u0159im\u011b\u0159en\u00fdm tempem. Procesor tak m\u016f\u017ee pokra\u010dovat v pr\u00e1ci bez zbyte\u010dn\u00e9ho zdr\u017een\u00ed a data se p\u0159itom spr\u00e1vn\u011b ulo\u017e\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1196b3f e-flex e-con-boxed e-con e-parent\" data-id=\"1196b3f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-730d422 elementor-widget elementor-widget-text-editor\" data-id=\"730d422\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Jak hosting ovliv\u0148uje v\u00fdkon webu?<\/h2><p>Cachov\u00e1n\u00ed m\u016f\u017ee v\u00fdrazn\u011b zlep\u0161it v\u00fdkon webu, nen\u00ed v\u0161ak jedin\u00fdm faktorem, kter\u00fd ur\u010duje, jak rychle se web na\u010d\u00edt\u00e1. D\u016fle\u017eitou roli hraje tak\u00e9 hostingov\u00e1 infrastruktura. Serverov\u00e9 prost\u0159edky, jako je CPU, RAM, rychlost \u00falo\u017ei\u0161t\u011b a v\u00fdkon s\u00edt\u011b, mohou ovlivnit, jak rychle se po\u017eadavky zpracov\u00e1vaj\u00ed, zejm\u00e9na kdy\u017e m\u00e1 web vysokou n\u00e1v\u0161t\u011bvnost.<\/p><p>I p\u0159i \u00fa\u010dinn\u00e9 strategii cachov\u00e1n\u00ed m\u016f\u017ee v\u00fdkon webu z\u016fstat slab\u00fd, pokud hostingov\u00e9 prost\u0159ed\u00ed nedok\u00e1\u017ee efektivn\u011b zvl\u00e1dat jeho z\u00e1t\u011b\u017e. Volba hostingov\u00e9 slu\u017eby s dostate\u010dn\u00fdmi prost\u0159edky a spolehliv\u00fdm v\u00fdkonem m\u016f\u017ee pomoci zkr\u00e1tit dobu odezvy serveru a zlep\u0161it u\u017eivatelsk\u00fd z\u00e1\u017eitek. Pokud tedy chcete zv\u00fd\u0161it rychlost a v\u00fdkon sv\u00e9ho webu, m\u016f\u017ee b\u00fdt vedle zaveden\u00ed optimaliza\u010dn\u00edch technik \u00fa\u010dinn\u00fdm krokem i pr\u016fzkum tarif\u016f <a href=\"\/cs\/webhosting\/\">webhostingu<\/a>, kter\u00e9 odpov\u00eddaj\u00ed pot\u0159eb\u00e1m va\u0161eho webu.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7570a06 e-flex e-con-boxed e-con e-parent\" data-id=\"7570a06\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b3af328 elementor-widget elementor-widget-text-editor\" data-id=\"b3af328\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Jak cachov\u00e1n\u00ed funguje?<\/h2><p>Cachov\u00e1n\u00ed existuje v r\u016fzn\u00fdch podob\u00e1ch a jde o ur\u010ditou formu ukl\u00e1d\u00e1n\u00ed dat. Kdy\u017e jsou data vy\u017e\u00e1d\u00e1na, nejprve se zkontroluje mezipam\u011b\u0165 a teprve pot\u00e9 se data na\u010d\u00edtaj\u00ed z pevn\u00e9ho disku. Proto\u017ee v\u0161ak mezipam\u011b\u0165 m\u00e1 omezenou kapacitu, nelze do n\u00ed ulo\u017eit v\u0161echna syst\u00e9mov\u00e1 data. Syst\u00e9m proto mus\u00ed ur\u010dit, kter\u00e1 data se maj\u00ed do mezipam\u011bti ukl\u00e1dat.<\/p><p>Na druhou stranu, kdy\u017e je mezipam\u011b\u0165 pln\u00e1 a je t\u0159eba p\u0159idat nov\u00e1, \u010dasto pou\u017e\u00edvan\u00e1 data, mus\u00ed syst\u00e9m rozhodnout, kter\u00e1 st\u00e1vaj\u00edc\u00ed data odstranit. K tomuto \u00fa\u010delu slou\u017e\u00ed r\u016fzn\u00e9 algoritmy, kter\u00e9 vyhodnocuj\u00ed, u kter\u00fdch dat je nejm\u00e9n\u011b pravd\u011bpodobn\u00e9, \u017ee budou znovu pou\u017eita.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4ee719d e-flex e-con-boxed e-con e-parent\" data-id=\"4ee719d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-51b9e52 elementor-widget elementor-widget-text-editor\" data-id=\"51b9e52\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Co je cache miss?<\/h2><p>Kdy\u017e aplikace po\u017eaduje r\u016fzn\u00e9 typy dat, po\u017eadavky se odes\u00edlaj\u00ed do mezipam\u011bti. Pokud po\u017eadovan\u00e1 data v mezipam\u011bti nejsou k dispozici, roste po\u010det tzv. cache miss (ne\u00fasp\u011b\u0161n\u00fdch p\u0159\u00edstup\u016f do mezipam\u011bti). To znamen\u00e1, \u017ee syst\u00e9m opakovan\u011b p\u0159istoupil do mezipam\u011bti, ale proto\u017ee tam pot\u0159ebn\u00e1 data nebyla, musel je na\u010d\u00edst z \u00falo\u017ei\u0161t\u011b.<\/p><p>To sni\u017euje v\u00fdkon syst\u00e9mu. Tento probl\u00e9m lze \u0159e\u0161it zv\u00fd\u0161en\u00edm kapacity mezipam\u011bti.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-82c6df1 e-flex e-con-boxed e-con e-parent\" data-id=\"82c6df1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cafb898 elementor-widget elementor-widget-text-editor\" data-id=\"cafb898\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Co je RAID \u0159adi\u010d?<\/h2><p>RAID \u0159adi\u010d je hardwarov\u00e1 komponenta server\u016f navr\u017een\u00e1 speci\u00e1ln\u011b ke zlep\u0161en\u00ed v\u00fdkonu cachov\u00e1n\u00ed a \u00falo\u017ei\u0161t\u011b. Jeho mezipam\u011b\u0165 s vyu\u017eit\u00edm flash pam\u011bti poskytuje dodate\u010dnou \u00falo\u017enou kapacitu a v\u00fdrazn\u011b zvy\u0161uje v\u00fdkon serveru.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ef3e64c e-flex e-con-boxed e-con e-parent\" data-id=\"ef3e64c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-740b1f3 elementor-widget elementor-widget-text-editor\" data-id=\"740b1f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>\u00daskal\u00ed cachov\u00e1n\u00ed<\/h2><ul><li>Lok\u00e1ln\u00ed mezipam\u011b\u0165: Ukl\u00e1d\u00e1n\u00ed r\u016fzn\u00fdch verz\u00ed stejn\u00fdch dat ve v\u00edce syst\u00e9mech m\u016f\u017ee v\u00e9st k nekonzistenci dat a sn\u00ed\u017eit efektivitu cachov\u00e1n\u00ed.<\/li><li>Probl\u00e9m koherence mezipam\u011bti: Kdy\u017e se data v jedn\u00e9 mezipam\u011bti zm\u011bn\u00ed, je obt\u00ed\u017en\u00e9 udr\u017eet odpov\u00eddaj\u00edc\u00ed kopie t\u011bchto dat synchronizovan\u00e9 v ostatn\u00edch mezipam\u011bt\u00edch.<\/li><li>Cache penetration: K tomuto jevu doch\u00e1z\u00ed, kdy\u017e po\u017eadovan\u00e1 data neexistuj\u00ed ani v mezipam\u011bti, ani v p\u016fvodn\u00ed datab\u00e1zi. Tento probl\u00e9m m\u016f\u017ee pomoci omezit pou\u017eit\u00ed Bloomova filtru.<\/li><li>Cache avalanche: V\u00fdpadek mezipam\u011bti nebo sou\u010dasn\u00e9 vypr\u0161en\u00ed platnosti velk\u00e9ho mno\u017estv\u00ed polo\u017eek v mezipam\u011bti m\u016f\u017ee do datab\u00e1ze poslat obrovsk\u00e9 mno\u017estv\u00ed po\u017eadavk\u016f a zp\u016fsobit v\u00fdpadky. Tento probl\u00e9m m\u016f\u017ee pomoci zm\u00edrnit pou\u017eit\u00ed clusteru mezipam\u011bti a n\u00e1stroj\u016f, jako je Hystrix.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b3cff08 e-flex e-con-boxed e-con e-parent\" data-id=\"b3cff08\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e55c7cb elementor-widget elementor-widget-text-editor\" data-id=\"e55c7cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Z\u00e1v\u011brem<\/h2><p>Cachov\u00e1n\u00ed je \u00fa\u010dinn\u00fd zp\u016fsob, jak zv\u00fd\u0161it v\u00fdkon syst\u00e9mu, zkr\u00e1tit dobu p\u0159\u00edstupu k dat\u016fm a sn\u00ed\u017eit v\u00fdpo\u010detn\u00ed z\u00e1t\u011b\u017e server\u016f. Podle po\u017eadavk\u016f syst\u00e9mu lze k ukl\u00e1d\u00e1n\u00ed a rychlej\u0161\u00edmu doru\u010dov\u00e1n\u00ed \u010dasto pou\u017e\u00edvan\u00fdch dat vyu\u017e\u00edt r\u016fzn\u00e9 metody cachov\u00e1n\u00ed. Pro udr\u017een\u00ed v\u00fdkonu a p\u0159edch\u00e1zen\u00ed probl\u00e9m\u016fm, jako jsou cache miss, probl\u00e9my s koherenc\u00ed mezipam\u011bti nebo cache avalanche, je v\u0161ak z\u00e1sadn\u00ed zvolit spr\u00e1vnou strategii cachov\u00e1n\u00ed a \u0159\u00e1dn\u011b spravovat data v mezipam\u011bti. Pochopen\u00ed toho, jak cachov\u00e1n\u00ed funguje, jak\u00e9 m\u00e1 typy a jak\u00e1 p\u0159in\u00e1\u0161\u00ed \u00faskal\u00ed, v\u00e1m pom\u016f\u017ee l\u00e9pe se rozhodovat p\u0159i n\u00e1vrhu a optimalizaci syst\u00e9m\u016f.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-56aa431 e-flex e-con-boxed e-con e-parent\" data-id=\"56aa431\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-4cd24fe e-con-full e-flex e-con e-child\" data-id=\"4cd24fe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3c9b0eb elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"3c9b0eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-question-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 448c-110.532 0-200-89.431-200-200 0-110.495 89.472-200 200-200 110.491 0 200 89.471 200 200 0 110.53-89.431 200-200 200zm107.244-255.2c0 67.052-72.421 68.084-72.421 92.863V300c0 6.627-5.373 12-12 12h-45.647c-6.627 0-12-5.373-12-12v-8.659c0-35.745 27.1-50.034 47.579-61.516 17.561-9.845 28.324-16.541 28.324-29.579 0-17.246-21.999-28.693-39.784-28.693-23.189 0-33.894 10.977-48.942 29.969-4.057 5.12-11.46 6.071-16.666 2.124l-27.824-21.098c-5.107-3.872-6.251-11.066-2.644-16.363C184.846 131.491 214.94 112 261.794 112c49.071 0 101.45 38.304 101.45 88.8zM298 368c0 23.159-18.841 42-42 42s-42-18.841-42-42 18.841-42 42-42 42 18.841 42 42z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fee56b6 e-con-full e-flex e-con e-child\" data-id=\"fee56b6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6b539ae elementor-widget elementor-widget-text-editor\" data-id=\"6b539ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>\u010cast\u00e9 dotazy<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1cbe91b elementor-widget elementor-widget-text-editor\" data-id=\"1cbe91b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3>1. Jak funguj\u00ed algoritmy pro vy\u0159azov\u00e1n\u00ed dat z mezipam\u011bti?<\/h3><p style=\"padding-left: 40px;\">Algoritmy pro vy\u0159azov\u00e1n\u00ed dat z mezipam\u011bti ur\u010duj\u00ed, kter\u00e1 data se maj\u00ed odstranit, kdy\u017e mezipam\u011b\u0165 dos\u00e1hne sv\u00e9 kapacity. Algoritmy jako LRU (Least Recently Used) a LFU (Least Frequently Used) vyb\u00edraj\u00ed data podle toho, jak ned\u00e1vno nebo jak \u010dasto se k nim p\u0159istupovalo.<\/p><p style=\"padding-left: 40px;\">Pou\u017eit\u00ed obou metod zvy\u0161uje zabezpe\u010den\u00ed dedikovan\u00e9ho serveru a dostupnost slu\u017eeb.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37e992e elementor-widget elementor-widget-text-editor\" data-id=\"37e992e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3>2. Co je koherence mezipam\u011bti a pro\u010d je d\u016fle\u017eit\u00e1?<\/h3><p style=\"padding-left: 40px;\">Koherence mezipam\u011bti zaji\u0161\u0165uje, \u017ee v\u00edce kopi\u00ed stejn\u00fdch dat ulo\u017een\u00fdch v mezipam\u011bti z\u016fst\u00e1v\u00e1 p\u0159i zm\u011bn\u00e1ch konzistentn\u00edch. Je obzvl\u00e1\u0161\u0165 d\u016fle\u017eit\u00e1 v distribuovan\u00fdch syst\u00e9mech a v\u00edceprocesorov\u00fdch prost\u0159ed\u00edch, kde m\u016f\u017ee v\u00edce mezipam\u011bt\u00ed uchov\u00e1vat kopie stejn\u00fdch dat.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>P\u0159edstavte si, \u017ee by web musel p\u0159i ka\u017ed\u00e9 va\u0161\u00ed n\u00e1v\u0161t\u011bv\u011b zpracov\u00e1vat v\u0161echna data od za\u010d\u00e1tku, aby na\u010detl obr\u00e1zky, zobrazil str\u00e1nky nebo z\u00edskal informace. To by nejen prodlou\u017eilo dobu odezvy, ale tak\u00e9 by to d\u00e1le zat\u011b\u017eovalo server a syst\u00e9mov\u00e9 prost\u0159edky. Pr\u00e1v\u011b zde p\u0159ich\u00e1z\u00ed na \u0159adu cachov\u00e1n\u00ed. D\u00edky ukl\u00e1d\u00e1n\u00ed \u010dasto pou\u017e\u00edvan\u00fdch dat do rychlej\u0161\u00ed pam\u011bti m\u016f\u017ee cachov\u00e1n\u00ed [\u2026]<\/p>\n","protected":false},"author":7,"featured_media":3490,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3595","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Co je cachov\u00e1n\u00ed a jak ovliv\u0148uje rychlost webu?<\/title>\n<meta name=\"description\" content=\"Zjist\u011bte, co je cachov\u00e1n\u00ed, jak funguje, jak\u00e9 m\u00e1 typy, v\u00fdhody a \u00faskal\u00ed a jak zrychluje web a zvy\u0161uje v\u00fdkon serveru.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/potenting.com\/cs\/blog\/what-is-caching-how-it-works-and-why-it-matters\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Co je cachov\u00e1n\u00ed a jak ovliv\u0148uje rychlost webu?\" \/>\n<meta property=\"og:description\" content=\"Zjist\u011bte, co je cachov\u00e1n\u00ed, jak funguje, jak\u00e9 m\u00e1 typy, v\u00fdhody a \u00faskal\u00ed a jak zrychluje web a zvy\u0161uje v\u00fdkon serveru.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/potenting.com\/cs\/blog\/what-is-caching-how-it-works-and-why-it-matters\/\" \/>\n<meta property=\"og:site_name\" content=\"Potenting Blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-27T09:30:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-27T09:53:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/10\/Dedicated-Server-Security-2.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"966\" \/>\n\t<meta property=\"og:image:height\" content=\"665\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Nina Ash\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nina Ash\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/potenting.com\\\/cs\\\/blog\\\/what-is-caching-how-it-works-and-why-it-matters\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/cs\\\/blog\\\/what-is-caching-how-it-works-and-why-it-matters\\\/\"},\"author\":{\"name\":\"Nina Ash\",\"@id\":\"https:\\\/\\\/potenting.com\\\/blog\\\/#\\\/schema\\\/person\\\/743a7b4616c4d55a0ed17f5ac379fcdb\"},\"headline\":\"Co je cachov\u00e1n\u00ed? 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