{"id":4944,"date":"2026-02-10T22:20:03","date_gmt":"2026-02-10T19:20:03","guid":{"rendered":"https:\/\/www.dchost.com\/blog\/vpste-noisy-neighbor-ve-cpu-steal-sorunlarini-tespit-etmek-ve-azaltmak\/"},"modified":"2026-02-10T22:20:03","modified_gmt":"2026-02-10T19:20:03","slug":"vpste-noisy-neighbor-ve-cpu-steal-sorunlarini-tespit-etmek-ve-azaltmak","status":"publish","type":"post","link":"https:\/\/www.dchost.com\/blog\/vpste-noisy-neighbor-ve-cpu-steal-sorunlarini-tespit-etmek-ve-azaltmak\/","title":{"rendered":"VPS\u2019te Noisy Neighbor ve CPU Steal Sorunlar\u0131n\u0131 Tespit Etmek ve Azaltmak"},"content":{"rendered":"<div class=\"dchost-blog-content-wrapper\"><p>VPS kullan\u0131rken CPU grafikleri tavan yapmad\u0131\u011f\u0131 h\u00e2lde uygulaman\u0131z\u0131n arada bir sebepsiz yava\u015flad\u0131\u011f\u0131n\u0131, cron i\u015flerinizin uzad\u0131\u011f\u0131n\u0131 veya veritaban\u0131 sorgular\u0131n\u0131z\u0131n ayn\u0131 y\u00fckte daha ge\u00e7 d\u00f6nd\u00fc\u011f\u00fcn\u00fc mutlaka ya\u015fam\u0131\u015fs\u0131n\u0131zd\u0131r. \u00d6zellikle kapasite planlama toplant\u0131lar\u0131nda \u201cSunucuyu b\u00fcy\u00fctelim mi, yoksa sorun ba\u015fka yerde mi?\u201d sorusuna net cevap verememek, teknik ekibin en s\u0131k zorland\u0131\u011f\u0131 noktalardan biridir. Bu belirsizli\u011fin arkas\u0131nda \u00e7o\u011fu zaman <strong>noisy neighbor<\/strong> (g\u00fcr\u00fclt\u00fcc\u00fc kom\u015fu) ve <strong>CPU steal<\/strong> sorunlar\u0131 yatar.<\/p>\n<p>VPS d\u00fcnyas\u0131nda i\u015flemci, RAM, disk ve a\u011f kaynaklar\u0131 fiziksel bir sunucu \u00fczerinde sanalla\u015ft\u0131r\u0131larak birden fazla kirac\u0131ya payla\u015ft\u0131r\u0131l\u0131r. E\u011fer ayn\u0131 fiziksel host \u00fczerinde sizin <a href=\"https:\/\/www.dchost.com\/tr\/vps\">VPS<\/a>\u2019inizle birlikte \u00e7al\u0131\u015fan ba\u015fka bir VPS anl\u0131k olarak \u00e7ok yo\u011fun CPU kullan\u0131rsa, hiperviz\u00f6r \u00f6nceli\u011fi o tarafa kayd\u0131rabilir. Siz kendi sanal makinenizde CPU t\u00fcketmiyor olsan\u0131z bile, <strong>CPU steal time<\/strong> ad\u0131 verilen bu durum y\u00fcz\u00fcnden i\u015flemcinin bir k\u0131sm\u0131n\u0131 <em>payla\u015famad\u0131\u011f\u0131n\u0131z<\/em> i\u00e7in uygulaman\u0131z yava\u015flar. Bu yaz\u0131da VPS\u2019te noisy neighbor ve CPU steal sorunlar\u0131n\u0131 hem <strong>nas\u0131l tespit edece\u011finizi<\/strong> hem de <strong>uygulama, sistem ve altyap\u0131 seviyesinde nas\u0131l azaltabilece\u011finizi<\/strong> ad\u0131m ad\u0131m anlataca\u011f\u0131z.<\/p>\n<div id=\"toc_container\" class=\"toc_transparent no_bullets\"><p class=\"toc_title\">\u0130&ccedil;indekiler<\/p><ul class=\"toc_list\"><li><a href=\"#VPSte_Noisy_Neighbor_ve_CPU_Steal_Nedir\"><span class=\"toc_number toc_depth_1\">1<\/span> VPS\u2019te Noisy Neighbor ve CPU Steal Nedir?<\/a><\/li><li><a href=\"#CPU_Steal_ve_Noisy_Neighbor_Nasil_Tespit_Edilir\"><span class=\"toc_number toc_depth_1\">2<\/span> CPU Steal ve Noisy Neighbor Nas\u0131l Tespit Edilir?<\/a><ul><li><a href=\"#Linux_Araclariyla_CPU_Steal_Olcumu\"><span class=\"toc_number toc_depth_2\">2.1<\/span> Linux Ara\u00e7lar\u0131yla CPU Steal \u00d6l\u00e7\u00fcm\u00fc<\/a><\/li><li><a href=\"#Uygulama_Seviyesinde_Noisy_Neighbor_Belirtileri\"><span class=\"toc_number toc_depth_2\">2.2<\/span> Uygulama Seviyesinde Noisy Neighbor Belirtileri<\/a><\/li><li><a href=\"#Uzun_Vadeli_Izleme_ve_Trend_Analizi\"><span class=\"toc_number toc_depth_2\">2.3<\/span> Uzun Vadeli \u0130zleme ve Trend Analizi<\/a><\/li><\/ul><\/li><li><a href=\"#Noisy_Neighbor_ile_Karistirilan_Diger_Performans_Sorunlari\"><span class=\"toc_number toc_depth_1\">3<\/span> Noisy Neighbor ile Kar\u0131\u015ft\u0131r\u0131lan Di\u011fer Performans Sorunlar\u0131<\/a><ul><li><a href=\"#Disk_IO_Darbogazlari\"><span class=\"toc_number toc_depth_2\">3.1<\/span> Disk IO Darbo\u011fazlar\u0131<\/a><\/li><li><a href=\"#RAM_Yetersizligi_ve_Swap_Kullanimi\"><span class=\"toc_number toc_depth_2\">3.2<\/span> RAM Yetersizli\u011fi ve Swap Kullan\u0131m\u0131<\/a><\/li><li><a href=\"#Uygulama_ve_Veritabani_Optimizasyon_Eksiklikleri\"><span class=\"toc_number toc_depth_2\">3.3<\/span> Uygulama ve Veritaban\u0131 Optimizasyon Eksiklikleri<\/a><\/li><\/ul><\/li><li><a href=\"#Noisy_Neighbor_Etkisini_Azaltmak_Icin_Uygulama_Tarafi_Stratejiler\"><span class=\"toc_number toc_depth_1\">4<\/span> Noisy Neighbor Etkisini Azaltmak \u0130\u00e7in Uygulama Taraf\u0131 Stratejiler<\/a><ul><li><a href=\"#Onbellekleme_ile_CPU_Yukunu_Hafifletmek\"><span class=\"toc_number toc_depth_2\">4.1<\/span> \u00d6nbellekleme ile CPU Y\u00fck\u00fcn\u00fc Hafifletmek<\/a><\/li><li><a href=\"#Arka_Plan_Isleri_ve_Kuyruk_Mimarisini_Dogru_Kurmak\"><span class=\"toc_number toc_depth_2\">4.2<\/span> Arka Plan \u0130\u015fleri ve Kuyruk Mimarisini Do\u011fru Kurmak<\/a><\/li><li><a href=\"#Kaynak_Limitleri_Process_Izolasyonu_ve_Dockercgroups_Kullanimi\"><span class=\"toc_number toc_depth_2\">4.3<\/span> Kaynak Limitleri, Process \u0130zolasyonu ve Docker\/cgroups Kullan\u0131m\u0131<\/a><\/li><\/ul><\/li><li><a href=\"#Altyapi_ve_Planlama_Tarafinda_Cozumler\"><span class=\"toc_number toc_depth_1\">5<\/span> Altyap\u0131 ve Planlama Taraf\u0131nda \u00c7\u00f6z\u00fcmler<\/a><ul><li><a href=\"#vCPU_Turu_ve_Plan_Secimini_Gozden_Gecirmek\"><span class=\"toc_number toc_depth_2\">5.1<\/span> vCPU T\u00fcr\u00fc ve Plan Se\u00e7imini G\u00f6zden Ge\u00e7irmek<\/a><\/li><li><a href=\"#Yatay_Olcekleme_ve_Is_Yuku_Ayristirma\"><span class=\"toc_number toc_depth_2\">5.2<\/span> Yatay \u00d6l\u00e7ekleme ve \u0130\u015f Y\u00fck\u00fc Ayr\u0131\u015ft\u0131rma<\/a><\/li><li><a href=\"#Altyapi_Saglayicinizla_Seffaf_Iletisim\"><span class=\"toc_number toc_depth_2\">5.3<\/span> Altyap\u0131 Sa\u011flay\u0131c\u0131n\u0131zla \u015eeffaf \u0130leti\u015fim<\/a><\/li><\/ul><\/li><li><a href=\"#DCHost_Altyapisinda_Noisy_Neighbor_Riskini_Nasil_Minimize_Ediyoruz\"><span class=\"toc_number toc_depth_1\">6<\/span> DCHost Altyap\u0131s\u0131nda Noisy Neighbor Riskini Nas\u0131l Minimize Ediyoruz?<\/a><\/li><li><a href=\"#Ozet_Noisy_Neighbor_ile_Yasamak_Zorunda_Degilsiniz\"><span class=\"toc_number toc_depth_1\">7<\/span> \u00d6zet: Noisy Neighbor ile Ya\u015famak Zorunda De\u011filsiniz<\/a><\/li><\/ul><\/div>\n<h2><span id=\"VPSte_Noisy_Neighbor_ve_CPU_Steal_Nedir\">VPS\u2019te Noisy Neighbor ve CPU Steal Nedir?<\/span><\/h2>\n<p><strong>Noisy neighbor<\/strong>, ayn\u0131 fiziksel sunucu \u00fczerinde \u00e7al\u0131\u015fan ba\u015fka bir VPS\u2019in, sizinle payla\u015f\u0131lan kaynaklar\u0131 (\u00f6zellikle CPU, disk IO ve a\u011f) <em>orant\u0131s\u0131z bi\u00e7imde<\/em> t\u00fcketmesi sonucu performans\u0131n\u0131z\u0131 olumsuz etkilemesi anlam\u0131na gelir. Buradaki \u201cg\u00fcr\u00fclt\u00fc\u201d, do\u011frudan sizin VPS\u2019inizde g\u00f6r\u00fcnen bir proses de\u011fil, altyap\u0131 taraf\u0131nda payla\u015f\u0131lan fiziksel kayna\u011f\u0131n bask\u0131lanmas\u0131d\u0131r.<\/p>\n<p><strong>CPU steal<\/strong> ise \u00f6zellikle KVM gibi sanalla\u015ft\u0131rma ortamlar\u0131nda kar\u015f\u0131m\u0131za \u00e7\u0131kan, sanal makinenin \u00e7al\u0131\u015ft\u0131rmak istedi\u011fi CPU talebinin, hiperviz\u00f6r taraf\u0131ndan ge\u00e7 veya k\u0131smen kar\u015f\u0131lanmas\u0131 durumunda \u00f6l\u00e7\u00fclen zaman dilimidir. Basit\u00e7e:<\/p>\n<ul>\n<li>VPS i\u00e7indeki \u00e7ekirdek, CPU\u2019da 100 ms \u00e7al\u0131\u015fmak istiyor,<\/li>\n<li>Hiperviz\u00f6r yo\u011funluktan dolay\u0131 bu iste\u011fi hemen kar\u015f\u0131layam\u0131yor,<\/li>\n<li>Aradaki \u201cbekleme\u201d s\u00fcresi <strong>steal time<\/strong> olarak kaydediliyor.<\/li>\n<\/ul>\n<p>Bu iki kavram birbirine s\u0131k\u0131 s\u0131k\u0131ya ba\u011fl\u0131d\u0131r: Genellikle y\u00fcksek CPU steal de\u011ferleri, ayn\u0131 hosttaki <strong>noisy neighbor<\/strong> etkisine i\u015faret eder. Ancak her steal art\u0131\u015f\u0131 illa ki k\u00f6t\u00fc bir altyap\u0131 anlam\u0131na gelmez; \u00f6nce sistematik bi\u00e7imde \u00f6l\u00e7mek ve di\u011fer metriklerle birlikte yorumlamak gerekir.<\/p>\n<h2><span id=\"CPU_Steal_ve_Noisy_Neighbor_Nasil_Tespit_Edilir\">CPU Steal ve Noisy Neighbor Nas\u0131l Tespit Edilir?<\/span><\/h2>\n<h3><span id=\"Linux_Araclariyla_CPU_Steal_Olcumu\">Linux Ara\u00e7lar\u0131yla CPU Steal \u00d6l\u00e7\u00fcm\u00fc<\/span><\/h3>\n<p>VPS i\u00e7inde do\u011frudan fiziksel hostu g\u00f6remezsiniz ama Linux \u00e7ekirde\u011finin sundu\u011fu baz\u0131 metriklerle <strong>steal time<\/strong>\u2019\u0131 izleyebilirsiniz. En pratik ara\u00e7lardan baz\u0131lar\u0131 \u015funlard\u0131r:<\/p>\n<ul>\n<li><strong>top<\/strong>: Varsay\u0131lan g\u00f6r\u00fcn\u00fcmde CPU sat\u0131r\u0131nda <code>st<\/code> alan\u0131 steal time\u2019\u0131 g\u00f6sterir.<\/li>\n<li><strong>htop<\/strong>: Her \u00e7ekirdek i\u00e7in ayr\u0131 steal y\u00fczdesini g\u00f6rmek i\u00e7in <em>Setup &gt; Columns<\/em> k\u0131sm\u0131ndan <code>Steal<\/code> s\u00fctununu ekleyebilirsiniz.<\/li>\n<li><strong>mpstat<\/strong> (sysstat paketi): <code>mpstat -P ALL 1<\/code> \u00e7\u0131kt\u0131s\u0131nda her CPU i\u00e7in <code>%steal<\/code> kolonu yer al\u0131r.<\/li>\n<li><strong>vmstat<\/strong>: <code>vmstat 1<\/code> \u00e7\u0131kt\u0131s\u0131ndaki <code>st<\/code> kolonu steal zaman\u0131n\u0131 saniye baz\u0131nda g\u00f6sterir.<\/li>\n<\/ul>\n<p>Sahada g\u00f6rd\u00fc\u011f\u00fcm\u00fcz tipik senaryolar \u015f\u00f6yle:<\/p>\n<ul>\n<li>Normal durumda <code>%steal<\/code> de\u011feri genelde <strong>0\u20131%<\/strong> civar\u0131nda seyreder.<\/li>\n<li>K\u0131sa s\u00fcreli <strong>5\u201310%<\/strong> s\u0131\u00e7ramalar anl\u0131k yo\u011funluklarda ya\u015fanabilir, \u00e7o\u011fu zaman tolere edilebilir.<\/li>\n<li>S\u00fcrekli veya s\u0131k s\u0131k <strong>20%+<\/strong> seviyelerinde steal g\u00f6rmek, noisy neighbor veya host taraf\u0131nda ciddi kapasite bask\u0131s\u0131 ya\u015fand\u0131\u011f\u0131na i\u015faret eder.<\/li>\n<\/ul>\n<p>\u00d6nemli nokta, steal de\u011ferine tek bir anl\u0131k bakmak yerine <strong>zaman serisi<\/strong> olarak izlemektir. Bu konuda ad\u0131m ad\u0131m komut \u00f6rnekleriyle ilerlemek isterseniz, <a href=\"https:\/\/www.dchost.com\/blog\/vps-kaynak-kullanimi-izleme-rehberi-htop-iotop-netdata-ve-prometheus\/\">VPS kaynak kullan\u0131m\u0131n\u0131 htop, iotop, Netdata ve Prometheus ile izlemeye y\u00f6nelik rehberimize<\/a> g\u00f6z atabilirsiniz.<\/p>\n<h3><span id=\"Uygulama_Seviyesinde_Noisy_Neighbor_Belirtileri\">Uygulama Seviyesinde Noisy Neighbor Belirtileri<\/span><\/h3>\n<p>CPU steal de\u011ferlerini toplamak \u00f6nemli, ancak \u00e7o\u011fu ekip sorunu \u00f6nce <strong>uygulama davran\u0131\u015f\u0131<\/strong> \u00fczerinden fark eder. Noisy neighbor ve y\u00fcksek steal time genellikle \u015fu belirtilerle kendini g\u00f6sterir:<\/p>\n<ul>\n<li><strong>Belirli saatlerde yava\u015flayan web sitesi<\/strong>: Trafik seviyesi ayn\u0131 oldu\u011fu h\u00e2lde \u00f6rne\u011fin her g\u00fcn 11:00\u201313:00 aras\u0131 TTFB ve sayfa y\u00fcklenme s\u00fcreleri art\u0131yorsa.<\/li>\n<li><strong>Cron job\u2019lar\u0131n uzamas\u0131<\/strong>: Normalde 1\u20132 dakika s\u00fcren rapor olu\u015fturma i\u015fleri arada 10 dakikaya kadar \u00e7\u0131k\u0131yorsa.<\/li>\n<li><strong>Kuyruk i\u015flerinin birikmesi<\/strong>: Queue worker\u2019lar\u0131n\u0131z\u0131n CPU kullan\u0131m\u0131 d\u00fc\u015f\u00fck g\u00f6r\u00fcnmesine ra\u011fmen, i\u015f kuyru\u011funda bekleyen g\u00f6rev say\u0131s\u0131 h\u0131zla art\u0131yorsa.<\/li>\n<li><strong>Veritaban\u0131 sorgu s\u00fcrelerinde d\u00fczensiz art\u0131\u015f<\/strong>: Ayn\u0131 sorgular ayn\u0131 veritaban\u0131 plan\u0131 ile bazen 20 ms, bazen 500 ms s\u00fcr\u00fcyorsa.<\/li>\n<\/ul>\n<p>Bu semptomlar sadece noisy neighbor kaynakl\u0131 olmayabilir; disk IO veya veritaban\u0131 optimizasyon problemleri de benzer etki yarat\u0131r. \u00d6zellikle \u201cg\u00fcn\u00fcn belli saatlerinde\u201d ya\u015fanan dalgalanmalar\u0131 analiz etmek i\u00e7in, <a href=\"https:\/\/www.dchost.com\/blog\/siteniz-belli-saatlerde-yavasliyorsa-paylasimli-hosting-ve-vpste-cpu-io-ve-mysql-darbogazi-teshisi\/\">belirli saatlerde yava\u015flayan siteler i\u00e7in CPU, IO ve MySQL darbo\u011faz\u0131 te\u015fhisi rehberimize<\/a> mutlaka g\u00f6z atman\u0131z\u0131 \u00f6neririz.<\/p>\n<h3><span id=\"Uzun_Vadeli_Izleme_ve_Trend_Analizi\">Uzun Vadeli \u0130zleme ve Trend Analizi<\/span><\/h3>\n<p>Noisy neighbor sorununu bir defal\u0131k \u00f6l\u00e7\u00fcmlerle yakalamak her zaman m\u00fcmk\u00fcn olmayabilir. En sa\u011fl\u0131kl\u0131 yakla\u015f\u0131m, CPU steal dahil t\u00fcm temel metrikleri <strong>24\/7 izleyip grafiklemek<\/strong>tir. Bunun i\u00e7in:<\/p>\n<ul>\n<li><strong>Node Exporter + Prometheus<\/strong> ile CPU, memory, disk ve network metriklerini toplayabilir,<\/li>\n<li><strong>Grafana<\/strong> ile %steal, load average, response time gibi de\u011ferlerin zaman i\u00e7indeki seyrini g\u00f6rebilir,<\/li>\n<li><strong>Uptime Kuma<\/strong> veya benzeri ara\u00e7larla u\u00e7tan uca HTTP yan\u0131t s\u00fcresini takip edebilirsiniz.<\/li>\n<\/ul>\n<p>Steal grafi\u011fi ile HTTP response time grafi\u011fini \u00fcst \u00fcste koydu\u011funuzda, belirli zamanlarda <strong>paralel y\u00fckseli\u015fler<\/strong> g\u00f6r\u00fcyorsan\u0131z, noisy neighbor \u015f\u00fcphesi g\u00fc\u00e7lenir. Bu t\u00fcr bir izleme altyap\u0131s\u0131n\u0131 s\u0131f\u0131rdan kurmak istiyorsan\u0131z, <a href=\"https:\/\/www.dchost.com\/blog\/vps-izleme-ve-alarm-kurulumu-prometheus-grafana-ve-uptime-kuma-ile-baslangic\/\">Prometheus, Grafana ve Uptime Kuma ile VPS izleme ve alarm kurulumunu anlatt\u0131\u011f\u0131m\u0131z yaz\u0131ya<\/a> ad\u0131m ad\u0131m bakabilirsiniz.<\/p>\n<h2><span id=\"Noisy_Neighbor_ile_Karistirilan_Diger_Performans_Sorunlari\">Noisy Neighbor ile Kar\u0131\u015ft\u0131r\u0131lan Di\u011fer Performans Sorunlar\u0131<\/span><\/h2>\n<p>Sahada s\u0131k\u00e7a g\u00f6rd\u00fc\u011f\u00fcm\u00fcz bir hata, her performans dalgalanmas\u0131n\u0131 \u201ckesin noisy neighbor\u201d diyerek a\u00e7\u0131klamaya \u00e7al\u0131\u015fmakt\u0131r. Oysa \u00e7o\u011fu zaman problem bamba\u015fka katmanlardad\u0131r. \u00d6zellikle \u015fu \u00fc\u00e7 ba\u015fl\u0131kla CPU steal\u2019i kar\u0131\u015ft\u0131rmamak \u00f6nemli:<\/p>\n<h3><span id=\"Disk_IO_Darbogazlari\">Disk IO Darbo\u011fazlar\u0131<\/span><\/h3>\n<p>Veritaban\u0131 veya dosya odakl\u0131 uygulamalarda, disk IO gecikmesi (latency) artt\u0131\u011f\u0131nda CPU kullan\u0131m\u0131 d\u00fc\u015f\u00fck kalsa da uygulama hissedilir \u015fekilde yava\u015flar. Bu durumda <code>iostat<\/code>, <code>iotop<\/code> ve veritaban\u0131 slow query log\u2019lar\u0131 size daha net sinyal verir. IO problemi ya\u015f\u0131yorsan\u0131z:<\/p>\n<ul>\n<li>Steal time genelde d\u00fc\u015f\u00fck kal\u0131r,<\/li>\n<li>Disk bekleme s\u00fcresi (await) ve queue depth y\u00fckselir,<\/li>\n<li>CPU \u201cbo\u015fta\u201d g\u00f6r\u00fcn\u00fcr ama istekler yava\u015f d\u00f6ner.<\/li>\n<\/ul>\n<p>B\u00f6yle durumlarda \u00f6ncelikle <strong>disk taraf\u0131n\u0131<\/strong> te\u015fhis etmek, gerekirse NVMe diskli planlara veya uygun depolama mimarisine ge\u00e7mek daha do\u011fru bir ad\u0131md\u0131r.<\/p>\n<h3><span id=\"RAM_Yetersizligi_ve_Swap_Kullanimi\">RAM Yetersizli\u011fi ve Swap Kullan\u0131m\u0131<\/span><\/h3>\n<p>Uygulaman\u0131z RAM\u2019i doldurup swap kullanmaya ba\u015flad\u0131\u011f\u0131nda, CPU steal olmasa bile sistem genel olarak a\u011f\u0131rla\u015f\u0131r. \u00d6zellikle PHP-FPM, Node.js veya Java tabanl\u0131 uygulamalarda bellek kullan\u0131m\u0131n\u0131 iyi y\u00f6netmek kritik. Bu minvalde, swap ve OOM killer davran\u0131\u015flar\u0131n\u0131 anlamak i\u00e7in <a href=\"https:\/\/www.dchost.com\/blog\/vpste-ram-swap-ve-oom-killer-yonetimi\/\">VPS\u2019te RAM, swap ve OOM killer y\u00f6netimi rehberimize<\/a> bakabilirsiniz.<\/p>\n<p>RAM kaynakl\u0131 yava\u015flamalarda tipik belirtiler:<\/p>\n<ul>\n<li><code>free -m<\/code> ve <code>vmstat<\/code> \u00e7\u0131kt\u0131s\u0131nda yo\u011fun swap kullan\u0131m\u0131,<\/li>\n<li>dmesg i\u00e7inde <code>Out of memory: Kill process<\/code> log\u2019lar\u0131,<\/li>\n<li>Steal % genelde d\u00fc\u015f\u00fck, fakat load average y\u00fcksek seyredebilir.<\/li>\n<\/ul>\n<h3><span id=\"Uygulama_ve_Veritabani_Optimizasyon_Eksiklikleri\">Uygulama ve Veritaban\u0131 Optimizasyon Eksiklikleri<\/span><\/h3>\n<p>\u0130yi optimize edilmemi\u015f sorgular, gereksiz b\u00fcy\u00fck objeleri RAM\u2019e alan kodlar veya yanl\u0131\u015f yap\u0131land\u0131r\u0131lm\u0131\u015f PHP-FPM havuzlar\u0131, CPU steal olmasa da y\u00fcksek load ve yava\u015f yan\u0131t s\u00fcrelerine yol a\u00e7abilir. \u00d6zellikle WordPress, WooCommerce ve benzeri PHP uygulamalar\u0131nda:<\/p>\n<ul>\n<li>OPcache ve object cache (Redis\/Memcached) kullan\u0131m\u0131,<\/li>\n<li>Do\u011fru PHP-FPM <code>pm<\/code> ve <code>pm.max_children<\/code> de\u011ferleri,<\/li>\n<li>Veritaban\u0131 indeksleme ve sorgu optimizasyonu<\/li>\n<\/ul>\n<p>gibi ba\u015fl\u0131klar do\u011frudan performans\u0131 etkiler. Bu konular\u0131 sistematik bi\u00e7imde ele almak i\u00e7in, <a href=\"https:\/\/www.dchost.com\/blog\/wordpress-icin-sunucu-tarafi-optimizasyon-php-fpm-opcache-redis-ve-mysql-ile-neyi-ne-zaman-nasil-ayarlamalisin\/\">WordPress i\u00e7in sunucu taraf\u0131 optimizasyon rehberimize<\/a> g\u00f6z atabilirsiniz.<\/p>\n<h2><span id=\"Noisy_Neighbor_Etkisini_Azaltmak_Icin_Uygulama_Tarafi_Stratejiler\">Noisy Neighbor Etkisini Azaltmak \u0130\u00e7in Uygulama Taraf\u0131 Stratejiler<\/span><\/h2>\n<p>Noisy neighbor tamamen altyap\u0131 kaynakl\u0131 bir konu gibi g\u00f6r\u00fcnse de, uygulama mimarisini do\u011fru kurarak bu etkinin hissedilirli\u011fini <strong>ciddi \u00f6l\u00e7\u00fcde azaltabilirsiniz<\/strong>. \u00d6zellikle CPU steal anlar\u0131nda \u201czarif\u00e7e yava\u015flayan\u201d ve kuyruklar\u0131n\u0131 patlatmayan sistemler tasarlamak m\u00fcmk\u00fcn.<\/p>\n<h3><span id=\"Onbellekleme_ile_CPU_Yukunu_Hafifletmek\">\u00d6nbellekleme ile CPU Y\u00fck\u00fcn\u00fc Hafifletmek<\/span><\/h3>\n<p>CPU steal anlar\u0131nda en b\u00fcy\u00fck avantaj\u0131n\u0131z, <strong>i\u015flemciye binen y\u00fck\u00fc zaten d\u00fc\u015f\u00fck tutuyor olman\u0131zd\u0131r<\/strong>. Bunun i\u00e7in:<\/p>\n<ul>\n<li>Statik i\u00e7erikler ve HTML sayfalar i\u00e7in reverse proxy veya tam sayfa cache (Nginx micro-caching, Varnish, LiteSpeed Cache vb.) kullan\u0131n.<\/li>\n<li>Veritaban\u0131 ile s\u0131k konu\u015fan kodlar i\u00e7in Redis\/Memcached tabanl\u0131 object cache kurun.<\/li>\n<li>Yo\u011fun raporlama veya filtreli listeleme sayfalar\u0131nda, sonu\u00e7lar\u0131 belirli aral\u0131klarla cache edip, her istekte yeniden hesaplamay\u0131n.<\/li>\n<\/ul>\n<p>B\u00f6ylece altyap\u0131 taraf\u0131nda k\u0131sa s\u00fcreli steal art\u0131\u015flar\u0131 ya\u015fansa bile, kullan\u0131c\u0131lar b\u00fcy\u00fck oranda cache\u2019den servis edildi\u011fi i\u00e7in hissedilen yava\u015flama minimumda kal\u0131r.<\/p>\n<h3><span id=\"Arka_Plan_Isleri_ve_Kuyruk_Mimarisini_Dogru_Kurmak\">Arka Plan \u0130\u015fleri ve Kuyruk Mimarisini Do\u011fru Kurmak<\/span><\/h3>\n<p>CPU steal sorunlar\u0131, zamanlamaya ba\u011fl\u0131 i\u015fler ve queue mimarilerinde daha ac\u0131 verici hissedilir. \u00d6rne\u011fin:<\/p>\n<ul>\n<li>Yo\u011fun bir e-posta kampanyas\u0131n\u0131 her gece 02:00\u2019de tek bir VPS \u00fczerinden g\u00f6ndermek,<\/li>\n<li>CPU a\u011f\u0131r rapor hesaplar\u0131n\u0131 senkron \u00e7al\u0131\u015ft\u0131rmak,<\/li>\n<li>Video veya g\u00f6rsel i\u015fleme gibi CPU yo\u011fun i\u015fleri web iste\u011fi s\u0131ras\u0131nda yapmak.<\/li>\n<\/ul>\n<p>Bu noktada yap\u0131lmas\u0131 gereken, bu i\u015f y\u00fcklerini <strong>arka plan kuyruklar\u0131na<\/strong> ta\u015f\u0131mak ve m\u00fcmk\u00fcnse ayr\u0131 worker s\u00fcre\u00e7leriyle y\u00f6netmektir. Laravel Queue, Supervisor, systemd veya PM2 gibi ara\u00e7larla pratik bir i\u015f\u00e7i mimarisi kurmak i\u00e7in, <a href=\"https:\/\/www.dchost.com\/blog\/vps-uzerinde-arka-plan-isleri-ve-kuyruk-yonetimi-laravel-queue-supervisor-systemd-ve-pm2\/\">arka plan i\u015fleri ve kuyruk y\u00f6netimi rehberimizden<\/a> yararlanabilirsiniz.<\/p>\n<p>Steal de\u011ferleri y\u00fckseldi\u011finde kuyruk i\u015f\u00e7ileri biraz yava\u015flayabilir ama:<\/p>\n<ul>\n<li>Kritik kullan\u0131c\u0131 istekleri bloklanmaz,<\/li>\n<li>Zamanla kuyruk tekrar bo\u015fal\u0131r,<\/li>\n<li>Performans dalgalanmas\u0131 daha y\u00f6netilebilir h\u00e2le gelir.<\/li>\n<\/ul>\n<h3><span id=\"Kaynak_Limitleri_Process_Izolasyonu_ve_Dockercgroups_Kullanimi\">Kaynak Limitleri, Process \u0130zolasyonu ve Docker\/cgroups Kullan\u0131m\u0131<\/span><\/h3>\n<p>Ayn\u0131 VPS \u00fczerinde birden fazla uygulama \u00e7al\u0131\u015ft\u0131r\u0131yorsan\u0131z, noisy neighbor etkisi sadece fiziksel hosttan de\u011fil, <strong>kendi i\u00e7 servislerinizden<\/strong> de gelebilir. \u00d6rne\u011fin yanl\u0131\u015f yap\u0131land\u0131r\u0131lm\u0131\u015f bir arka plan worker\u2019\u0131 kendi VPS\u2019iniz i\u00e7inde di\u011fer uygulamalar\u0131n\u0131z i\u00e7in noisy neighbor rol\u00fc \u00fcstlenebilir.<\/p>\n<p>Bunu engellemek i\u00e7in:<\/p>\n<ul>\n<li>Docker veya systemd slice\u2019lar\u0131 \u00fczerinden CPU ve RAM limitleri tan\u0131mlay\u0131n.<\/li>\n<li>Her proje i\u00e7in ayr\u0131 PHP-FPM havuzu, ayr\u0131 user ve gerekirse ayr\u0131 container kullan\u0131n.<\/li>\n<li>CPU yo\u011fun batch i\u015fleri i\u00e7in <code>nice<\/code> ve <code>ionice<\/code> ile \u00f6ncelik d\u00fc\u015f\u00fcr\u00fcn.<\/li>\n<\/ul>\n<p>B\u00f6ylece hem fiziksel host seviyesindeki noisy neighbor etkisini daha az hisseder, hem de kendi VPS\u2019inizde projeler aras\u0131 kaynak \u00e7eki\u015fmesini s\u0131n\u0131rlam\u0131\u015f olursunuz.<\/p>\n<h2><span id=\"Altyapi_ve_Planlama_Tarafinda_Cozumler\">Altyap\u0131 ve Planlama Taraf\u0131nda \u00c7\u00f6z\u00fcmler<\/span><\/h2>\n<p>Uygulama taraf\u0131nda yapabileceklerinizi yapt\u0131ktan sonra h\u00e2l\u00e2 <strong>y\u00fcksek ve kal\u0131c\u0131 CPU steal<\/strong> ya\u015f\u0131yorsan\u0131z, art\u0131k i\u015f altyap\u0131 ve kapasite planlama taraf\u0131na kayar. Burada yap\u0131labilecekleri \u00fc\u00e7 ba\u015fl\u0131kta \u00f6zetleyebiliriz.<\/p>\n<h3><span id=\"vCPU_Turu_ve_Plan_Secimini_Gozden_Gecirmek\">vCPU T\u00fcr\u00fc ve Plan Se\u00e7imini G\u00f6zden Ge\u00e7irmek<\/span><\/h3>\n<p>VPS d\u00fcnyas\u0131nda her vCPU ayn\u0131 de\u011fildir. Genel olarak:<\/p>\n<ul>\n<li><strong>Payla\u015f\u0131ml\u0131 vCPU<\/strong>: Ayn\u0131 fiziksel \u00e7ekirdek birden fazla VPS\u2019e payla\u015ft\u0131r\u0131l\u0131r. Do\u011fru oranlarla yap\u0131ld\u0131\u011f\u0131nda maliyet\/performans dengesi iyidir ancak noisy neighbor riski daha y\u00fcksektir.<\/li>\n<li><strong>Dedicated vCPU \/ pinned core<\/strong>: Fiziksel \u00e7ekirde\u011fin belirli bir k\u0131sm\u0131 veya tamam\u0131 sadece sizin VPS\u2019inize ayr\u0131l\u0131r. Noisy neighbor riski ciddi \u015fekilde azal\u0131r, maliyet y\u00fckselir.<\/li>\n<\/ul>\n<p>DCHost taraf\u0131nda, CPU yo\u011fun i\u015f y\u00fckleri i\u00e7in m\u00fc\u015fterilerle yapt\u0131\u011f\u0131m\u0131z de\u011ferlendirmelerde genellikle \u015fu yolu izliyoruz:<\/p>\n<ul>\n<li>\u00d6nce 1\u20132 haftal\u0131k detayl\u0131 metrik toplay\u0131p ger\u00e7ek CPU kullan\u0131m desenini \u00e7\u0131kar\u0131yoruz.<\/li>\n<li>Kal\u0131c\u0131 y\u00fcksek steal g\u00f6r\u00fcl\u00fcyorsa, \u00f6nce ayn\u0131 veri merkezinde farkl\u0131 fiziksel hosta ta\u015f\u0131ma gibi <strong>altyap\u0131sal iyile\u015ftirmeleri<\/strong> deniyoruz.<\/li>\n<li>\u0130\u015f y\u00fck\u00fc ger\u00e7ekten CPU a\u011f\u0131rl\u0131kl\u0131ysa (\u00f6rne\u011fin video i\u015fleme, raporlama, ML inferencing), dedicated vCPU veya gerekirse <strong>dedicated sunucu<\/strong> taraf\u0131na ge\u00e7meyi masaya yat\u0131r\u0131yoruz.<\/li>\n<\/ul>\n<h3><span id=\"Yatay_Olcekleme_ve_Is_Yuku_Ayristirma\">Yatay \u00d6l\u00e7ekleme ve \u0130\u015f Y\u00fck\u00fc Ayr\u0131\u015ft\u0131rma<\/span><\/h3>\n<p>Tek bir b\u00fcy\u00fck VPS \u00fczerinde her \u015feyi \u00e7al\u0131\u015ft\u0131rmak yerine, i\u015f y\u00fck\u00fcn\u00fc mant\u0131kl\u0131 par\u00e7alara b\u00f6lmek hem noisy neighbor etkisini hem de genel riskleri azalt\u0131r. \u00d6rne\u011fin:<\/p>\n<ul>\n<li>Web sunucusu + PHP-FPM<\/li>\n<li>Veritaban\u0131 sunucusu<\/li>\n<li>Queue\/worker sunucusu<\/li>\n<\/ul>\n<p>\u015feklinde \u00fc\u00e7 VPS\u2019lik bir mimari, tek b\u00fcy\u00fck VPS\u2019e g\u00f6re daha \u00f6ng\u00f6r\u00fclebilir davran\u0131r. Bir node \u00fczerinde ge\u00e7ici noisy neighbor etkisi ya\u015fansa bile, di\u011fer bile\u015fenler ayakta kal\u0131r ve toplam deneyim daha stabil olur.<\/p>\n<p>DCHost \u00fczerinde bu t\u00fcr \u00f6l\u00e7eklendirmelerde, veritaban\u0131 ve queue gibi bile\u015fenleri ayr\u0131 VPS\u2019lere almak ve gerekti\u011finde bunlar\u0131 <a href=\"https:\/\/www.dchost.com\/tr\/fiziksel-sunucu\">dedicated sunucu<\/a> veya colocation taraf\u0131na ta\u015f\u0131mak, s\u0131k kulland\u0131\u011f\u0131m\u0131z bir yol haritas\u0131d\u0131r.<\/p>\n<h3><span id=\"Altyapi_Saglayicinizla_Seffaf_Iletisim\">Altyap\u0131 Sa\u011flay\u0131c\u0131n\u0131zla \u015eeffaf \u0130leti\u015fim<\/span><\/h3>\n<p>Noisy neighbor ve CPU steal tamamen sizin kontrol\u00fcn\u00fczde olmayan, <strong>hiperviz\u00f6r ve fiziksel host<\/strong> katman\u0131nda ortaya \u00e7\u0131kan problemler oldu\u011fu i\u00e7in, bir noktadan sonra hosting sa\u011flay\u0131c\u0131n\u0131zla birlikte hareket etmek zorundas\u0131n\u0131z. Sa\u011fl\u0131kl\u0131 bir s\u00fcre\u00e7 i\u00e7in:<\/p>\n<ul>\n<li>Toplad\u0131\u011f\u0131n\u0131z <code>%steal<\/code> grafikleri, load average, response time ve log\u2019lar\u0131 destek talebine ekleyin.<\/li>\n<li>\u201c\u015eu saatler aras\u0131 \u015fu pattern\u2019i g\u00f6r\u00fcyorum\u201d diyerek somut \u00f6rnekler verin.<\/li>\n<li>Gerekti\u011finde VPS\u2019inizi farkl\u0131 bir fiziksel hosta ta\u015f\u0131ma, plan\u0131n\u0131z\u0131 dedicated vCPU\u2019ya y\u00fckseltme gibi opsiyonlar\u0131 beraber de\u011ferlendirin.<\/li>\n<\/ul>\n<p>DCHost ekibi olarak, m\u00fc\u015fterilerimizden bu tarz detayl\u0131 metrik geldi\u011finde fiziksel host taraf\u0131nda da kontroller yap\u0131yor, gerekti\u011finde g\u00fcr\u00fclt\u00fc yapan VPS\u2019leri k\u0131s\u0131tlama veya farkl\u0131 hostlara ta\u015f\u0131ma gibi aksiyonlarla noisy neighbor etkisini minimumda tutuyoruz.<\/p>\n<h2><span id=\"DCHost_Altyapisinda_Noisy_Neighbor_Riskini_Nasil_Minimize_Ediyoruz\">DCHost Altyap\u0131s\u0131nda Noisy Neighbor Riskini Nas\u0131l Minimize Ediyoruz?<\/span><\/h2>\n<p>Noisy neighbor tamamen yok edilebilen bir olgu de\u011fil; ancak do\u011fru mimari ve politika setiyle pratikte fark edilmeyecek seviyelere indirilebilir. DCHost taraf\u0131nda bu konuda uygulad\u0131\u011f\u0131m\u0131z ba\u015fl\u0131ca yakla\u015f\u0131mlar \u015funlar:<\/p>\n<ul>\n<li><strong>Dengeli overcommit oranlar\u0131<\/strong>: Fiziksel host ba\u015f\u0131na vCPU ve RAM overcommit oranlar\u0131n\u0131 agresif tutmuyor, yo\u011fun i\u015f y\u00fcklerini daha ba\u015ftan uygun host gruplar\u0131na yerle\u015ftiriyoruz.<\/li>\n<li><strong>Proaktif izleme<\/strong>: Fiziksel host seviyesinde de CPU, IO ve network metriklerini izleyerek \u201chost bazl\u0131\u201d anomalileri yakal\u0131yor, daha m\u00fc\u015fteri \u015fik\u00e2yet etmeden aksiyon al\u0131yoruz.<\/li>\n<li><strong>Kaynak ihlali yapan VPS\u2019ler i\u00e7in politikalar<\/strong>: S\u00fcrekli limit \u00fcst\u00fc CPU veya IO t\u00fcketen VPS\u2019leri otomatik kurallarla tespit ediyor, \u00f6nce bilgilendiriyor, gerekirse throttle veya ta\u015f\u0131ma uyguluyoruz.<\/li>\n<li><strong>Dedicated vCPU ve dedicated sunucu opsiyonlar\u0131<\/strong>: G\u00fcr\u00fclt\u00fcye hassas, ger\u00e7ek zamanl\u0131 veya finansal sistemler i\u00e7in do\u011frudan izole kaynak sunan mimariler \u00f6neriyoruz.<\/li>\n<li><strong>Colocation se\u00e7ene\u011fi<\/strong>: Baz\u0131 m\u00fc\u015fteriler kendi donan\u0131mlar\u0131n\u0131 getirerek tamamen kendilerine ait fiziksel sunucularda \u00e7al\u0131\u015fmay\u0131 tercih ediyor; biz de veri merkezi, a\u011f ve operasyonel katman\u0131 sa\u011fl\u0131yoruz.<\/li>\n<\/ul>\n<p>B\u00fct\u00fcn bunlar\u0131n \u00fczerine, m\u00fc\u015fterilerimizin VPS\u2019lerinde detayl\u0131 metrik toplamalar\u0131n\u0131 ve d\u00fczenli sa\u011fl\u0131k kontrolleri yapmalar\u0131n\u0131 te\u015fvik ediyoruz. Monitoring taraf\u0131n\u0131 sa\u011flam kurdu\u011funuzda, noisy neighbor ve CPU steal gibi konular\u0131 sezgiyle de\u011fil, <strong>veriyle konu\u015fma<\/strong> imk\u00e2n\u0131n\u0131z oluyor.<\/p>\n<h2><span id=\"Ozet_Noisy_Neighbor_ile_Yasamak_Zorunda_Degilsiniz\">\u00d6zet: Noisy Neighbor ile Ya\u015famak Zorunda De\u011filsiniz<\/span><\/h2>\n<p>Noisy neighbor ve CPU steal, sanalla\u015ft\u0131r\u0131lm\u0131\u015f altyap\u0131lar\u0131n do\u011fas\u0131nda var ama bu, performans dalgalanmalar\u0131n\u0131 \u201ckader\u201d olarak kabullenece\u011finiz anlam\u0131na gelmiyor. Do\u011fru metrikleri izleyerek, uygulama mimarinizi g\u00fc\u00e7lendirerek ve altyap\u0131 sa\u011flay\u0131c\u0131n\u0131zla veri odakl\u0131 ileti\u015fim kurarak bu etkiyi pratikte g\u00f6r\u00fcnmez seviyeye indirebilirsiniz.<\/p>\n<p>\u00d6ncelikle VPS\u2019inizde <strong>%steal<\/strong> de\u011ferlerini, load average\u2019i ve uygulama yan\u0131t s\u00fcrelerini d\u00fczenli olarak takip edin. Disk IO, RAM ve uygulama tarafl\u0131 sorunlar\u0131 eleyip ger\u00e7ekten noisy neighbor \u015f\u00fcphesi kald\u0131\u011f\u0131nda, somut grafiklerle birlikte bizimle ileti\u015fime ge\u00e7in. DCHost olarak; gerek ayn\u0131 veri merkezi i\u00e7inde farkl\u0131 hostlara ta\u015f\u0131ma, gerekse dedicated vCPU, dedicated sunucu veya colocation gibi daha izole \u00e7\u00f6z\u00fcmlere ge\u00e7i\u015fte size ad\u0131m ad\u0131m yol haritas\u0131 \u00e7\u0131karabiliriz.<\/p>\n<p>Altyap\u0131n\u0131z\u0131 g\u00f6zden ge\u00e7irmek, monitoring kurmak veya mevcut VPS\u2019inizde noisy neighbor olas\u0131l\u0131\u011f\u0131n\u0131 birlikte de\u011ferlendirmek isterseniz, DCHost ekibine her zaman ula\u015fabilirsiniz. Metriklere dayal\u0131 net bir tablo \u00e7\u0131kard\u0131ktan sonra, performans\u0131n\u0131z\u0131 istikrarl\u0131 h\u00e2le getirmek i\u00e7in en uygun mimariyi birlikte tasarlayal\u0131m.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>VPS kullan\u0131rken CPU grafikleri tavan yapmad\u0131\u011f\u0131 h\u00e2lde uygulaman\u0131z\u0131n arada bir sebepsiz yava\u015flad\u0131\u011f\u0131n\u0131, cron i\u015flerinizin uzad\u0131\u011f\u0131n\u0131 veya veritaban\u0131 sorgular\u0131n\u0131z\u0131n ayn\u0131 y\u00fckte daha ge\u00e7 d\u00f6nd\u00fc\u011f\u00fcn\u00fc mutlaka ya\u015fam\u0131\u015fs\u0131n\u0131zd\u0131r. \u00d6zellikle kapasite planlama toplant\u0131lar\u0131nda \u201cSunucuyu b\u00fcy\u00fctelim mi, yoksa sorun ba\u015fka yerde mi?\u201d sorusuna net cevap verememek, teknik ekibin en s\u0131k zorland\u0131\u011f\u0131 noktalardan biridir. Bu belirsizli\u011fin arkas\u0131nda \u00e7o\u011fu zaman noisy neighbor [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4945,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-4944","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-teknoloji"],"_links":{"self":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/posts\/4944","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/comments?post=4944"}],"version-history":[{"count":0,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/posts\/4944\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/media\/4945"}],"wp:attachment":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/media?parent=4944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/categories?post=4944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/tags?post=4944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}