{"id":20231,"date":"2018-05-21T14:16:57","date_gmt":"2018-05-21T14:16:57","guid":{"rendered":"https:\/\/kinsta.com\/it\/?post_type=knowledgebase&#038;p=20231"},"modified":"2025-10-01T20:54:33","modified_gmt":"2025-10-01T19:54:33","slug":"cosa-e-nginx","status":"publish","type":"post","link":"https:\/\/kinsta.com\/it\/blog\/cosa-e-nginx\/","title":{"rendered":"Cosa \u00e8 Nginx? Una Rapida Occhiata a Cosa \u00e8 e Come Funziona"},"content":{"rendered":"<p><a href=\"https:\/\/www.nginx.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Nginx<\/a>, pronunciato &#8220;engine-ex&#8221;, \u00e8 un web server open source che, a cominciare dal suo successo iniziale come server, \u00e8 ora utilizzato anche come <a href=\"https:\/\/kinsta.com\/it\/blog\/proxy-inverso\/\">proxy inverso<\/a>, cache HTTP e bilanciatore di carico.<\/p>\n<p>Tra le varie aziende di alto profilo che utilizzano Nginx, ricordiamo Autodesk, Atlassian, Intuit, T-Mobile, GitLab, DuckDuckGo, Microsoft, IBM, Google, Adobe, Salesforce, VMWare, Xerox, LinkedIn, Cisco, Facebook, Target, Citrix Systems, Twitter, Apple , Intel e molti altri (<a href=\"https:\/\/siftery.com\/company\/nginx\" target=\"_blank\" rel=\"noopener noreferrer\">fonte<\/a>).<\/p>\n<p>Nginx \u00e8 stato originariamente creato da Igor Sysoev, con il suo primo rilascio al pubblico nell&#8217;ottobre del 2004. Igor inizialmente concep\u00ec il software come risposta al <a href=\"https:\/\/en.wikipedia.org\/wiki\/C10k_problem\" target=\"_blank\" rel=\"noopener noreferrer\">problema C10k<\/a>, riguardante le anomalie delle prestazioni nella gestione di 10.000 connessioni simultanee.<\/p>\n<p>Dato che le sue origini sono legate all&#8217;ottimizzazione delle prestazioni su scala, nei test di benchmark Nginx supera spesso le prestazioni di altri server web popolari, specialmente in situazioni con contenuto statico e\/o numerose richieste simultanee, motivo per cui <a href=\"https:\/\/kinsta.com\/it\/hosting-wordpress\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kinsta utilizza Nginx<\/a> per alimentare il suo servizio di hosting.<\/p>\n<ul>\n<li><a href=\"#come-funziona-nginx\">Come funziona Nginx?<\/a><\/li>\n<li><a href=\"#statistiche-nginx-apache\">Statistiche di Utilizzo di Nginx rispetto ad Apache<\/a><\/li>\n<li><a href=\"#verifica-esecuzione-nginx-apache\">Come Verificare se Girate su Nginx o Apache<\/a><\/li>\n<\/ul>\n<h2 id=\"come-funziona-nginx\">Come funziona Nginx?<\/h2>\n<p>Nginx \u00e8 stato progettato per garantire un <strong>basso consumo di memoria<\/strong> e un&#8217;elevata concorrenza. Anzich\u00e9 creare nuovi processi per ogni richiesta web, Nginx utilizza un approccio asincrono, basato sugli eventi, in cui le richieste vengono gestite in un singolo thread.<\/p>\n<p>Con Nginx, un processo master pu\u00f2 controllare pi\u00f9 processi worker. Il master mantiene i processi worker, mentre i worker eseguono l&#8217;elaborazione effettiva. Poich\u00e9 Nginx \u00e8 asincrono, ogni richiesta pu\u00f2 essere eseguita dal worker contemporaneamente senza bloccare altre richieste.<\/p>\n<p>Alcune caratteristiche comuni di Nginx sono:<\/p>\n<ul>\n<li>Reverse proxy con caching<\/li>\n<li>IPv6<\/li>\n<li>Bilanciamento del carico<\/li>\n<li>Supporto FastCGI con caching<\/li>\n<li>WebSockets<\/li>\n<li>Gestione di file statici, file indice e autoindicizzazione<\/li>\n<li><a href=\"https:\/\/kinsta.com\/it\/blog\/tls-ssl\/\">TLS\/SSL<\/a> con SNI<\/li>\n<\/ul>\n<p>Su Kinsta, puoi dare <a href=\"https:\/\/kinsta.com\/it\/add-on-di-kinsta\/?plan=visits-business1&#038;interval=month\">un&#8217;occhiata a Nginx e a tutti gli altri nostri add-on premium<\/a>.<\/p>\n<h2 id=\"statistiche-nginx-apache\">Statistiche di Utilizzo di Nginx rispetto ad Apache<\/h2>\n<p><a href=\"https:\/\/kinsta.com\/it\/blog\/cosa-e-apache\/\" target=\"_blank\" rel=\"noopener noreferrer\">Apache<\/a> \u00e8 un altro famoso web server open-source. In termini di numeri grezzi, Apache \u00e8 il server web pi\u00f9 popolare, ed \u00e8 utilizzato dal 47% di tutti i siti web con un server noto, <a href=\"https:\/\/w3techs.com\/technologies\/cross\/web_server\/ranking\" target=\"_blank\" rel=\"noopener noreferrer\">secondo quanto afferma W3Techs<\/a>. Nginx \u00e8 secondo a poca distanza con il 41.8%.<\/p>\n<p>Netcraft ha fatto un <a href=\"https:\/\/news.netcraft.com\/archives\/2019\/04\/22\/april-2019-web-server-survey.html\" target=\"_blank\" rel=\"noopener noreferrer\">sondaggio<\/a> su 233 milioni di domini e ha scoperto che l&#8217;utilizzo di Apache si attesta al 31.54%, mentre l&#8217;utilizzo di Nginx \u00e8 al 26.20%.<\/p>\n<figure id=\"attachment_24962\" aria-describedby=\"caption-attachment-24962\" style=\"width: 1462px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-24962\" src=\"https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/web-server-developers-quota-di-mercato-dei-domini.png\" alt=\"Web server developers: quote di mercato dei domini\" width=\"1462\" height=\"748\" srcset=\"https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/web-server-developers-quota-di-mercato-dei-domini.png 1462w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/web-server-developers-quota-di-mercato-dei-domini-300x153.png 300w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/web-server-developers-quota-di-mercato-dei-domini-768x393.png 768w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/web-server-developers-quota-di-mercato-dei-domini-1024x524.png 1024w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/web-server-developers-quota-di-mercato-dei-domini-610x312.png 610w\" sizes=\"auto, (max-width: 1462px) 100vw, 1462px\" \/><figcaption id=\"caption-attachment-24962\" class=\"wp-caption-text\">Web server developers: quote di mercato dei domini (Origine immagine: <a href=\"https:\/\/news.netcraft.com\/archives\/2019\/04\/22\/april-2019-web-server-survey.html\" target=\"_blank\" rel=\"noopener noreferrer\">Netcraft<\/a>)<\/figcaption><\/figure>\n<p>Mentre Apache \u00e8 l&#8217;opzione complessivamente pi\u00f9 popolare, <strong>Nginx \u00e8 in realt\u00e0 il server web pi\u00f9 popolare tra i siti web ad alto traffico<\/strong>.<\/p>\n<p>Quando si analizzano i tassi di utilizzo in base al traffico, <strong>Nginx alimenta<\/strong>:<\/p>\n<ul>\n<li>Il 60,9% dei 100.000 siti pi\u00f9 popolari (dal 56,1% del 2018)<\/li>\n<li>Il 67.1% dei 10.000 siti pi\u00f9 popolari (dal 63.2% del 2018)<\/li>\n<li>Il 62.1% dei 1.000 siti pi\u00f9 popolari (dal 57% del 2018)<\/li>\n<\/ul>\n<p>Infatti, Nginx \u00e8 utilizzato da alcuni dei siti che consumano pi\u00f9 risorse, tra cui <a href=\"https:\/\/www.nginx.com\/blog\/why-netflix-chose-nginx-as-the-heart-of-its-cdn\/\" target=\"_blank\" rel=\"noopener noreferrer\">Netflix<\/a>, NASA e persino WordPress.com.<\/p>\n<p><strong>L&#8217;utilizzo di Apache<\/strong>, d&#8217;altra parte, si muove nella direzione opposta rispetto all&#8217;aumento del traffico del sito. Questo alimenta:<\/p>\n<ul>\n<li>Il 24,0% dei 100.000 siti pi\u00f9 popolari (dal 27,1% del 2018)<\/li>\n<li>Il 18,8% dei 10.000 siti pi\u00f9 popolari (dal 21,5% del 2018)<\/li>\n<li>Il 16,6% dei 1.000 siti pi\u00f9 popolari (dal 16,2% del 2018)<\/li>\n<\/ul>\n<p>Se diamo un&#8217;occhiata ai <a href=\"https:\/\/trends.google.com\/trends\/explore?date=all&#038;q=nginx,apache\" target=\"_blank\" rel=\"noopener noreferrer\">termini di ricerca di Google<\/a> dal 2004, possiamo vedere che Apache \u00e8 in costante decrescita, mentre Nginx ha visto una leggera crescita.<\/p>\n<figure id=\"attachment_20235\" aria-describedby=\"caption-attachment-20235\" style=\"width: 1996px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20235\" src=\"https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/termini-ricerca-nginx-vs-apache-e1521229502606.png\" alt=\"Termini di ricerca Nginx vs Apache\" width=\"1996\" height=\"588\" srcset=\"https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/termini-ricerca-nginx-vs-apache-e1521229502606.png 1996w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/termini-ricerca-nginx-vs-apache-e1521229502606-300x88.png 300w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/termini-ricerca-nginx-vs-apache-e1521229502606-768x226.png 768w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/termini-ricerca-nginx-vs-apache-e1521229502606-1024x302.png 1024w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/termini-ricerca-nginx-vs-apache-e1521229502606-610x180.png 610w\" sizes=\"auto, (max-width: 1996px) 100vw, 1996px\" \/><figcaption id=\"caption-attachment-20235\" class=\"wp-caption-text\">Nginx vs Apache<\/figcaption><\/figure>\n<p>Ancora una volta, considerando che Nginx offre prestazioni migliori su scala, non sorprende che i siti web ad alto traffico optino per Nginx piuttosto che ad Apache. Dai un&#8217;occhiata al nostro confronto pi\u00f9 approfondito di <a href=\"https:\/\/kinsta.com\/it\/blog\/nginx-verso-apache\/\">Nginx vs Apache<\/a>.<\/p>\n<h2 id=\"verifica-esecuzione-nginx-apache\">Come Verificare se Girate su Nginx o Apache<\/h2>\n<p>Per la maggior parte dei siti Web, basta semplicemente controllare l&#8217;intestazione HTTP <code>server<\/code> per vedere \u00e8 Nginx o Apache. Potete vedere le intestazioni HTTP lanciando la scheda di rete in Chrome Devtools. Oppure potete controllare le intestazioni in uno strumento come <a href=\"https:\/\/kinsta.com\/it\/blog\/test-velocita-pingdom\/\" target=\"_blank\" rel=\"noopener noreferrer\">Pingdom<\/a> o <a href=\"https:\/\/kinsta.com\/it\/blog\/speed-test-gtmetrix\/\" target=\"_blank\" rel=\"noopener noreferrer\">GTmetrix<\/a>.<\/p>\n<p>Tuttavia, l&#8217;intestazione HTTP potrebbe non rivelare sempre il server web sottostante. Ad esempio, se il vostro sito WordPress \u00e8 dietro un servizio proxy come Cloudflare, l&#8217;intestazione HTTP del <code>server<\/code> dir\u00e0, invece, cloudflare.<\/p>\n<figure id=\"attachment_20234\" aria-describedby=\"caption-attachment-20234\" style=\"width: 1697px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20234\" src=\"https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/header-http-nginx.png\" alt=\"Header HTTP Nginx\" width=\"1697\" height=\"656\" srcset=\"https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/header-http-nginx.png 1697w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/header-http-nginx-300x116.png 300w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/header-http-nginx-768x297.png 768w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/header-http-nginx-1024x396.png 1024w, https:\/\/kinsta.com\/it\/wp-content\/uploads\/sites\/2\/2018\/05\/header-http-nginx-610x236.png 610w\" sizes=\"auto, (max-width: 1697px) 100vw, 1697px\" \/><figcaption id=\"caption-attachment-20234\" class=\"wp-caption-text\">Header HTTP Nginx<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Nginx, pronunciato &#8220;engine-ex&#8221;, \u00e8 un web server open source che, a cominciare dal suo successo iniziale come server, \u00e8 ora utilizzato anche come proxy inverso, cache &#8230;<\/p>\n","protected":false},"author":38,"featured_media":20233,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[36,39],"topic":[25929],"class_list":["post-20231","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-hosting","tag-nginx","topic-suggerimenti-marketing-online"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cosa \u00e8 Nginx? 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